vardhaman college of engineering8. a) write a note on the following machine independent operating...

Hall Ticket No: Question Paper Code : A1423

VARDHAMAN COLLEGE OF ENGINEERING (AUTONOMOUS)

B. Tech V Semester Supplementary Examinations, May - 2016 (Regulations: VCE-R11/R11A)

MICROPROCESSORS AND INTERFACING (Common to Computer Science and Engineering & Information Technology)

Date: 07 May, 2016 Time: 3 hours Max Marks: 75

Answer ONE question from each Unit All Questions Carry Equal Marks

Unit – I

1. a) Explain with a neat diagram, 8086 microprocessor architecture. 10M b) Explain the PIN diagram of 8086-based microcomputer operated in minimum mode.

5M

2. a) Explain the various categories of registers present in 8086 microprocessor. 8M b) Discuss the timing diagram of read operation with waiting state.

7M

Unit – II

3. a) Explain each of the following instructions with examples: i. XCHG ii. OUT DX, AX iii. SAHF iv. XLAT

7M

b) Write an ALP using 8086 instructions to mask lower nibble of upper – half array elements and mask higher nibble of lower-half array elements. The array size is 10h.

8M

4. a) What is a procedure? What are the advantages of using procedures in program development? Differentiate between macro and procedure.

8M

b) Write an ALP to Search for a given element in an array of 10 elements.

7M

Unit – III

5. a) Explain interfacing of keyboard to 8086 microprocessor. 8M b) Give the block diagram for interfacing 8255 (PPI) in mode 0 between ADC and 8086. Use

BSR mode for SOC and EOC signals. Write an ALP for the same.

7M

6. a) How stepper motor is controlled using 8086 microprocessor? 8M b) Interface two 4k X 8 EPROM’s and two 4k X 8 RAM chips with 8086 microprocessor.

7M

Unit – IV

7. a) Explain BIOS interrupts with example. 7M b) Give the block diagram of 8086 microprocessor connected in the maximum mode of

operation and explain its working.

8M

8. a) What is the maximum number of interrupts that 8086 can handle and name the scheme which makes it possible.

5M

b) With a neat diagram, explain the working of 8259A priority interrupt controller.

10M

Unit – V

9. a) Explain the mode word, command word and status word of 8251 USART. 7M b) What is segmentation and Virtual memory in 80386?

8M

10. a) Discuss 80286 architecture. 8M b) Give the need for RS-423A, RS-422A and explain them with their respective driver and

receiver circuits. 7M

Hall Ticket No: Question Paper Code: A1513

VARDHAMAN COLLEGE OF ENGINEERING

(AUTONOMOUS) B. Tech V Semester Supplementary Examinations, May - 2016

(Regulations: VCE-R11/R11A)

SOFTWARE ENGINEERING

(Common to Computer Science and Engineering & Information Technology)

Date: 10 May, 2016 Time: 3 hours Max Marks: 75 Answer ONE question from each Unit

All Questions Carry Equal Marks

Unit – I

1. a) Distinguish between a software product and a software process. 8M b) Define software engineering. What are the characteristics of software product?

7M

2. a) Explain with suitable Illustration about SPIRAL model. 7M b) Explain the following software phases of waterfall model:

i. Design and specification ii. Delivery and maintenance

8M

Unit – II

3. a) Explain the different types of Non-Functional Requirements. 8M b) Explain the Context Model of ATM system.

7M

4. a) Explain the structure of Software Requirement Document with respect to IEEE standard. 7M b) Explain the different Architectural Styles.

8M

Unit – III

5. a) Discuss the different strategic issues that must be addressed if a Software Testing strategy is to be implemented.

8M

b) Differentiate between White box and Black box testing.

7M

6. a) Explain System testing and discuss the types of phases in System testing. 8M b) What is validation testing and discuss the different validation testing approaches?

7M

Unit – IV

7. a) Explain the different Metrics for Source Code and Testing. 8M b) Explain the different Metrics for Software Quality.

7M

8. a) Discuss the different types of checks in Risk Identification. 6M b) Discuss how Risk Mitigation, Monitoring and Management assist project team in

developing a strategy for dealing with risk.

9M

Unit – V

9. a) Define "software Quality". Explain different indicators of measuring quality. 10M b) Write short notes on Statistical Quality Assurance.

5M

10. a) Identify and elaborate all the risk factors in software project. Also, explain the techniques that can be used to manage them.

10M

b) Write short notes on Formal and Informal technical Reviews. 5M




UNIX PROGRAMMING (Common to Computer Science and Engineering & Information Technology)



Unit - I 1. a) With suitable examples explain the following Unix General purpose Utilities:

i. cal ii. date iii. bc

6M

b) Write the important features of Unix operating System.

9M

2. a) Discuss the significance of any five built in variables used by awk with suitable examples. 10M b) Demonstrate the usage of CPIO with –i and –o options.

5M

Unit – II 3. a) Write a Shell script to accept 2 file names, check if the permission for these files are

identical/not, outputs each filename. 5M

b) With their corresponding syntax explain the following: i. Lseek( ) ii. Lstat( ) iii. Umask( ) iv. Chmod( )

10M

4. a) Explain the different types of files supported by Unix. 8M b) Demonstrate the usage of the following in Unix with suitable examples:

i. Pipes ii. i/o redirection

7M

Unit – III 5. a) Write a program to avoid Zombie process. 5M b) Explain the file sharing between the parent process and the child process with a neat

diagram.

10M

6. a) Explain the functions for dynamic allocation of memory in C. 6M b) Explain the different types of record locking and file locking in Unix.

9M

Unit – IV 7. a) What are pipes? Explain the different ways to view a half duplex pipe. Write a program to

create a pipe between a parent and its child and to send data down the pipe. 10M

b) Discuss with an example, the client server communication using FIFO.

5M

8. a) Explain the following function related to message queues: i. msgget( ) ii. msgsnd( )

5M

b) What are semaphores? What is their purpose? List and explain the APIs used to create and control the semaphores.

10M

Cont…2

::2::

Unit – V 9. a) What is a socket? Describe the socket API. Explain the different APIs used for

establishing connection between two systems using socket. 10M

b) Explain the BYTE Ordering and types of byte ordering.

5M

10. With the help of proper syntax give the significance of the following functions: i. Send ( ) ii. Receive ( ) iii. Sendto ( ) iv. Recvfrom ( ) v. Close ( )

15M




COMPUTER NETWORKS (Common to Computer Science and Engineering & Information Technology)



Unit - I 1. a) List and explain the popular uses of the Internet for home users. 5M b) Explain the two types of transmission technology.

10M

2. a) Explain in detail OSI reference model. 8M b) With a neat diagram, explain Public switched telephone network.

7M

Unit – II 3. a) State and explain the design issues for data link layer. 7M b) With a neat diagram explain 802.16 protocol stack and frame format.

8M

4. a) Explain the working of HDLC protocol with required frame formats. 10M b) State the difference between Bluetooth and WLAN.

5M

Unit – III 5. a) Compare the Virtual circuit and Datagram Subnets. 5M b) Explain the shortest path routing algorithm with suitable example.

10M

6. a) Define Congestion control. Explain the congestion control principles and policies. 10M b) What is Count-to-infinity problem?

5M

Unit – IV 7. a) Discuss in various transport primitives used in Berkeley UNIX for TCP. 7M b) With a neat diagram explain TCP header format.

8M

8. a) Illustrate the three protocol scenarios for establishing connection using three-way handshake.

10M

b) Discuss TCP Congestion control.

5M

Unit – V 9. Write a short notes on:

i. Electronic mail ii. File transfer protocol

15M

10. a) Explain in detail about domain name system. 10M b) What are problems with SMTP? 5M





SYSTEMS PROGRAMMING

(Computer Science and Engineering) Date: 17 May, 2016 Time: 3 hours Max Marks: 75


Unit – I

1. a) Suppose the ALPHA is an array of 100 words. Write a sequence of instructions for SIC/XE to set all 100 elements of array to ZERO. Use immediate addressing and register to register addressing to make the process as efficient as possible.

6M

b) List the data structures used by TWO PASS assembler. Write the PASS-1 and PASS-2 functionalities of TWO PASS assembler. Also Write an algorithm for PASS-1 of two pass assembler.

9M

2. a) Generate the target address for the following assembly level program. Finally indicate the values of register A. Content of X register (X)=000090 Content of B register (B)=006000 Content of PC register (PC)=003000 [3030] = 003600, [3600] = 103000 , [6390] = 00C303 , [C303] = 003030 032600 03C300 022030 010030 003600 0310C303

6M

b) What is one pass assembler? Mention two types of one pass assembler. Explain the implementation of forward referencing in the mentioned assemblers.

9M

Unit – II

3. a) What are relative loaders? Explain the two methods of relocating a program. 7M b) Explain the concept of program relocation by bit mask.

8M 4. a) Explain the loader design options. 7M b) Write an algorithm for pass 1 of linking loader.

8M

Unit – III

5. a) Briefly discuss the various data structures required for the design of one pass macro processor.

6M

b) With regard to machine independent microprocessor features, explain the following: i. Concatenation of macro parameters ii. Generation of unique labels

9M

6. a) Explain MASM Macro Processor. 8M b) What is meant by line by line macro processor? Mention its advantages and

disadvantage.

7M

Unit – IV

7. a) What is an interrupt? Describe the four classes of interrupts of SIC/XE computer. 7M b) Write an algorithm for processing an I/O request and processing an I/O interrupt.

8M

Cont…2

:: 2 ::

8. a) Write a note on the following machine independent operating system features: i. File processing ii. Job scheduling

10M

b) Discuss the features of distributed operating systems.

5M

Unit – V

9. a) Explain the features and functions of Embedded software. 7M b) Write short note on android system software.

8M

10. a) Explain the concept of cloud virtualization. 7M b) Explain the cloud service models. 8M




DESIGN AND ANALYSIS OF ALGORITHMS (Common to Computer Science and Engineering & Information Technology)



Unit - I 1. a) Define Asymptotic notations. 6M b) Write an algorithm to sort elements using quicksort. Draw the tree structure for the

recursive calls made for the input. Analyze the efficiency of quciksort: M, E, R, G, E, S, O, R, T

9M

2. a) Use the informal definitions of O, θ, and Ω to determine whether the following assertions are true or false: i. n(n2+1)/2 ∈ O(n3) ii. n(n+1)/2 ∈ O(n2) iii. n(n-1)/2 ∈ θ(n3) iv. n(log n)/2 ∈ Ω(n)

6M

b) Multiply the following two matrices using Strassen’s matrix multiplication technique and find its efficiency:

1 23 4

and 1 12 2

9M

Unit – II 3. a) Compare DFS and BFS traversal techniques. Analyze its time efficiency. 7M b) What is Job sequencing with deadline? Obtain an optimal solution for the following jobs

using greedy technique, where n=5, profit=(1, 5, 20, 15, 10) and deadlines= (1, 2, 4, 1, 3).

8M

4. a) Give an algorithm for DFS and BFS traversals. Find DFS and BFS traversal for the following graph with the starting vertex 4:

Fig.1

10M

b) Find the shortest path from the vertex 1 to all other vertices for the following graph using Dijkstra’s algorithm:

Fig.2

5M

Cont…2

::2::

Unit – III 5. a) Give any 2 differences between Dynamic programming technique and Greedy technique. 4M b) Write Floyd’s algorithm and analyze its time efficiency. Find all pair shortest path for the

following graph:

Fig.3

11M

6. a) Discuss the technique Dynamic programming used for problem solving. 5M b) Solve the following instance of knapsack problem using Dynamic programming technique

where n=5 and capacity of knapsack w=6, Give objects selected:

Items Weight Profit 1 3 25 2 2 20 3 1 15 4 4 40 5 5 50

10M

Unit – IV 7. a) Solve the following sum of subsets problem using backtracking technique.

S = 3, 5, 6, 7 and the sun of subsets d = 15. 7M

b) Apply backtracking to the problem of find a hamiltonain circuit in the following graph:

Fig.4

8M

8. a) Explain the principal idea of the branch and bound technique. List out the reasons when to terminate a search path at the current node in branch and bound technique.

7M

b) Apply the branch and bound technique to solve the 0/1 knapsack problem for the following (capacity = 10):

Item Weight Value 1 4 40 2 7 42 3 5 25 4 3 12

8M

Unit – V 9. a) What is non deterministic algorithm, explain with an example. Compare P, NP, NP-

Complete problem. 8M

b) Discuss on Cook’s theorem.

7M

10. a) Define decision tree with an example, obtain decision tree for 3 elements insertion sort. 8M b) Explain with an example:

i. Lower Bounds through Reduction ii. Adversary Arguments

7M




THEORY OF COMPUTATION (Information Technology)



Unit – I

1. a) Explain the operations on the string with an example for each. 8M b) Write an algorithm to convert an NFA to DFA.

7M

2. a) Convert the given ε NFA to its equivalent DFA: δ ε a b c

→p q,r Ф q r q Ф p r p,q *r Ф Ф Ф Ф

7M

b) Define distinguishable and indistinguishable states. Minimize the given automata using table filling algorithm:

δ 0 1 →A B A

B A C C D B

*D D A E D F F G E G F G H G D

8M

Unit – II

3. a) Obtain regular expressions for the following: i. Language consisting of strings of 0s and 1s with atleast three consecutive 0’s ii. Language of strings of a’s and b’s such that every block of 4 consecutive symbols

contains atleast two a’s

6M

b) Prove using Pumping Lemma that the language consisting of set of strings of balanced parenthesis is not regular.

9M

4. a) Show that if the language L is regular then LR (reversal of L) is also regular. 7M b) Obtain an ε-NFA for the regular expression (a+b)*ab.

8M

Unit – III

5. a) Write CFG for: L=anbncm | n>0, m>=0 L=w w is a string of a’s and b’s and w is a palindrome

7M

b) Verify the below grammars are ambiguous or not? i. EE | E-E | E*E |id ii. S aB | Ba A aS | bAA | a B bS | aBB | b

8M

Cont…2

:: 2 ::

6. a) Show that CFLs are closed under union and concatenation. 8M b) Eliminate useless symbols and productions from the grammar:

S aA | a | Bb | cC aaB Ba| Aa C cCD Dddd

7M

Unit – IV

7. a) Define DPDA. Construct a PDA to accept the language L=anbn| n ≥1 . 8M b) Write an algorithm to convert:

i. CFG to PDA ii. PDA to CFG

7M

8. a) Construct a PDA to accept the Language L=a nb2n | n ≥1 7M b) Obtain CFG for the given PDA:

δ(q0,a,Z)=(q0,AZ) δ(q0,a,A)=( q0,A) δ(q0,b,A)=( q1, Є) δ(q1,Є,Z)=( q2, Є)

8M

Unit – V

9. a) Briefly explain the types of Turing Machines. 7M b) Construct a Turing machine to accept the language:

L= wwR | w is any string of 0’s and 1’s

8M

10. a) Write a note on recursively enumerable language. 7M b) Explain the following:

i. PCP ii. Halting problem

8M




OBJECT ORIENTED PROGRAMMING THROUGH JAVA (Common to Electronics and Communication Engineering &

Electrical and Electronics Engineering) Date: 07 May, 2016 Time: 3 hours Max Marks: 75


Unit – I

1. a) List the three OOP principles and explain them. 7M b) Create a class Student which includes data members usn, name, percentage_marks.

Include member functions for the following: i. Accept the above details ii. Display the details iii. Display the name of the topper iv. Total number of students who have failed v. Create n student objects and perform the above functionalities

8M

2. a) List and explain the features of java. 10M b) Explain about the following operators with examples:

i. >> ii. >>>

5M

Unit – II

3. a) Demonstrate the three uses of final keyword with an example program. 5M b) Write a java program to create a class Student whose data members are usn, name and

phoneno. Derive a class Test from Student to include an array of CIE marks of each course and their corresponding credits in another array. Derive a class Exam from Test which includes an array of SEE marks. Derive a class Result which calculates the grade for each course and then and displays all the above details of n students.

10M

4. a) Explain with suitable code the different types of Inheritance supported by Java language. 7M b) What are Interfaces? Write a Java code to demonstrate multiple base class inheritance

using interfaces.

8M

Unit – III

5. a) Define Exceptions. List and Explain with code the keywords associated with exception handling.

8M

b) How to create our own exception subclasses? Create an exception called MyDivideByZeroException which is thrown when we divide a number by zero.

7M

6. a) What are Threads? Explain the different thread priorities of Java Thread. 8M b) Write a Java code to demonstrate the creation of Thread using Runnable interface.

7M

Cont…2

:: 2 ::

Unit – IV

7. a) Write short notes on: i. Relationship between event sources and listeners ii. Adapter classes

7M

b) Write program to display the following output using awt components which has four checkboxes naming the different operating systems. As user selects the checkbox, Applet has to display the status of all the checkboxes.

8M

8. a) Discuss the various ways for using the font selection procedure in AWT. 5M b) Write a program for handling any 4 mouse events.

10M

Unit – V

9. a) Explain the following with an example for each: i. JTextField class ii. JButton class iii. JComboBox class

6M

b) Write a program that creates a frame window in an applet. Display the message “Mouse is clicked here” at the position of mouse click. This feature is to be included in both applet and the frame window.

9M

10. a) What are applets? Explain the different stages in the life cycle of an applet. Write a program to find the area of a circle.

10M

b) Write a Java swing applet, which accepts a text from a JText field, and displays the same text with selected font size and font color using Jlabel.

5M




ELECTRONIC MEASUREMENTS AND INSTRUMENTATION (Electronics and Communication Engineering)



Unit - I 1. a) What are the three general classes of errors? Explain. 7M b) With a neat block diagram explain the working of dual slope DVM.

8M

2. a) Explain shunt type Ohmmeter. Derive the expression to find shunt resistor. 8M b) A set of independent voltage measurements taken by four observers was recorded as

117.02 V, 117.11V, 117.08V and 117.03V. Calculate: i. The average voltage ii. The range of error

7M

Unit – II 3. a) With a neat block diagram explain the general purpose Oscilloscope. 10M b) Why is delay line used in the vertical section of the Oscilloscope? Explain.

5M

4. a) How to obtain the vertical input and sweep generator signal synchronization. Explain different methods of it.

8M

b) How Lissajous pattern helps in measuring the phase difference between the signals. Explain with example.

7M

Unit – III 5. a) Explain the Digital Readout Oscilloscope with neat diagram. 8M b) Draw the block diagram of Digital Storage Oscilloscope and explain its working principle.

7M

6. a) Explain the Ac bridge used to measure low resistance (>1 ohm) values, and derive the expression to calculate the unknown resistance value.

8M

b) An unbalanced Wheat Stone bridge is given in Fig.1. Calculate the current through the Galvanometer:

Fig.1

7M

Unit – IV 7. a) Explain the principle of Thermistor and its various configurations in detail. 7M b) What are temperature transducers? Explain resistance thermometer in detail. 8M

Cont…2

::2::

8. a) Draw the circuit diagram of Instrumentation amplifier and explain its functionality. 8M b) With neat diagram explain the working principle of LVDT.

7M

Unit – V 9. a) With a neat block diagram explain digital data acquisition system. 8M b) Explain measurement of force using variable differential transformer transducer with

necessary diagram.

7M

10. a) Draw and explain the block diagram of PC based data acquisition system. 8M b) Explain measurement of pressure using inductive type pressure transducer with

necessary diagram. 7M





INTEGRATED CIRCUITS APPLICATIONS

(Common to Electronics and Communication Engineering & Electrical and Electronics Engineering)



Unit – I

1. a) Explain with relevant circuit diagrams and equations how the total output offset voltage of an Op-Amp due to non-ideal DC characteristics is assessed.

7M

b) List the different blocks of a typical Op-Amp. Briefly explain the function of each block.

8M

2. a) Define Slew rate of an Op-Amp. Assuming slew rate for 741 is 0.5V/µs, what is the maximum frequency of undistorted sine wave that can be obtained for: i. 12V peak ii. 2V peak

8M

b) Explain briefly different ways of classifying Integrated circuits.

7M

Unit – II

3. a) What are the merits of Instrumentation amplifier over conventional differential amplifier and obtain expression for the gain of an instrumentation amplifier.

7M

b) Derive the expression for the frequency of oscillation of a Wein’s bridge oscillator using op amp. Design the circuit for a frequency of 965Hz.

8M

4. a) Design an inverting Schmitt trigger circuit using Op-Amp with UTP=+4V and LTP=+2V. Assume a sinusoidal input signal and Vsat=±10V. Plot the input and output waveforms. Indicate the trigger points. Also plot the transfer characteristic.

7M

b) Derive the expression for the gain A in the circuit shown in the Fig.1, assuming Ri=R1. Also find the scaling factor.

Fig.1

8M

Unit – III

5. a) Derive the expression for the voltage gain of a Second order Butterworth high pass filter. 8M b) With a neat circuit diagram, waveforms explain the working of a Monostable

multivibrator using 555 timer. Clearly explain the function of the reset input.

7M

6. a) Describe the principle of operation of PLL and show how this can be used for frequency multiplication. Sketch the diagram.

8M

b) With a neat circuit diagram, waveforms explain the working of an Astable multivibrator using op-amp. Derive the expression for the frequency for a duty cycle of 50%.

7M

Cont…2

:: 2 ::

Unit – IV

7. a) With the help of 723 IC block diagram explain the working of a low voltage regulator. 7M b) List the advantages of R-2R DAC. Explain with the help of a circuit diagram working of R-

2R ladder DAC.

8M

8. a) Design a voltage regulator using 723 IC for an o/p voltage of 10V at IL=100mA. Draw the schematic diagram with component values.

7M

b) Explain the working of a 3 bit Flash ADC. List its advantages and disadvantages.

8M

Unit – V

9. a) Design a mod-12 Asynchronous up counter using IC 7493. 7M b) Construct a 16 X 1 multiplexer using 4 X 1 multiplexers and logic gates.

8M

10. a) Implement a full subtractor using a decoder IC 74138. 7M b) Explain the working of a 3-bit shift register using D-FFs. 8M




DIGITAL DESIGN THROUGH VERILOG HDL (Electronics and Communication Engineering)



Unit – I

1. a) Explain the ASIC design and development flow with an appropriate diagram. 8M b) Write a Verilog test bench program for simulating the OR gate.

7M

2. a) Explain the functional mismatch, timing mismatch and overload issues at the debugging stage.

8M

b) Write a note on the use of scalars and vectors used in Verilog HDL with examples.

7M

Unit – II

3. a) Write a verilog code for master slave D-ff using structural modelling. 7M b) Write a verilog code and test bench for the given circuit.

Fig.1

8M

4. a) Write a verilog code for 1-bit full adder using gate level modelling. 5M b) A 2 input XOR gate can be built from my-and, my-or and my-not gates. Construct an XOR

module in verilog that realizes the logic function z=xy’+x’y. Inputs are X and Y and Z is the output. Write the stimulus module that exercise all four combination of x and y inputs.

10M

Unit – III

5. a) Explain the blocking and non-blocking assignments used in Verilog HDL with appropriate examples.

8M

b) Design a Verilog HDL module to implement a versatile counter that can function as an up-down counter using the ‘initial’ construct.

7M

6. a) Design a Verilog HDL code to implement a D-Latch and its simulated output. 8M b) Explain the five types of stratified events present during the execution stages in a Verilog

HDL. 7M

Unit – IV

7. a) Describe the different operators used in Verilog HDL with appropriate examples. 7M b) Design a switch level Verilog construct to implement a NMOS inverter with pull-up load.

Also sketch the circuit diagram for the same.

8M

8. a) Design a simple CMOS switch with a single control line in Verilog HDL. Support your solution with an appropriate circuit.

8M

b) Write the switch level verilog code, discuss for 2 input NAND gate.

7M

Cont…2

:: 2 ::

Unit – V

9. a) Design a Verilog module to illustrate a D Flip-flop with edge sensitive path delay and also its test bench.

7M

b) Design a Verilog HDL module to add two 32-bit numbers through a function definition.

8M

10. a) Consider the Half adder module as an example and illustrate the process of writing into a file.

7M

b) Design a Verilog HDL module to compute the sum of squares of first ‘n’ natural numbers using recursive functions.

8M





ANALOG COMMUNICATIONS

(Electronics and Communication Engineering) Date: 17 May, 2016 Time: 3 hours Max Marks: 75


Unit – I

1. a) Explain the coherent detection of DSB-SC waves and write frequency domain representation.

8M

b) Find the power saving when the carrier wave and one of the side bands are suppressed in the AM wave with modulation depth: i. 100% ii. 50%

7M

2. a) Explain working of square law demodulator to detect AM wave. 7M b) AM voltage represented by V=5[1+0.6 cos(6280t)]sin(2 π X 104t)volts. Write minimum

and maximum amplitude of AM wave. What frequency components are contained in the modulated wave and its amplitude?

8M

Unit – II

3.

a) If x t is the Hilbert transform of x(t), then

Show that the Hilbert transform of x t is -x(t)

Show that energies of x(t) and x t are identical

8M

b) With relevant block diagram explain the frequency discrimination method of generation of SSB modulated signal.

7M

4. a) With a neat block diagram briefly explain about frequency division multiplexing. 7M b) Show that for distortion less demodulation of a VSB signal using the synchronous

detector, the frequency response H(w) of the VSB filter of given in the Fig.1, (below) must satisfy the condition: tanc cH w w H w w Cons t for mw w

Fig.1

8M

Cont…2

:: 2 ::

Unit – III

5. a) In a tone modulated angle modulation, the modulated signal x(t)is x(t)=A cos (wct +β sin wmt). When β<<1,we have narrow band angle modulation: i. Find the spectrum of this NB angle -modulated signal ii. Compare the result with that of a tone modulated AM signal

7M

b) An angle modulated signal with carrier frequency wc=2π х106 is described by the equation S(t)=10cos(wct+0.1sin2000πt), Find out: i. The power of the modulated signal ii. The frequency deviation Δf iii. The bandwidth of S(t)

8M

6. a) With relevant block diagram explain the direct method of generation of frequency modulated signal.

7M

b) Design an Armstrong indirect FM modulator to generate an FM signal with carrier frequency 97.20MHz and frequency deviation of 10.24kHz. An NBFM generator of carrier frequency 20kHz and frequency deviation of 5Hz is available. Only frequency doublers can be used as multipliers. A local oscillator is available with the frequency between 400 to 500kHz which can be used for frequency mixing.

8M

Unit – IV

7. a) With noise model, analyze noise performance FM receiver and indicate its figure of merit. 9M b) Compute transmission BW of SSB and DSB system for transmitting audio signal which has

BW of 10kHz. List two advantages of PPM system.

6M

8. a) Evaluate the figure of merit for single tone AM receiver and comment on this. 8M b) List two features of FDM. Compute Nyquist rate and Nyquist interval for

x(t) =2coss(2000πt).

7M

Unit – V

9. a) The above is the block diagram of frequency multiplication and heterodyning section of an FM transmitter. Determine the carrier frequency and frequency deviation at points 1, 2, 3. Assume that at point 3 additive frequency is selected by mixture.

Fig.2

7M

b) Explain the working principle of tuned radio frequency receiver with suitable block diagram.

8M

10. a) For a receiver with IF and RF frequencies of 450KHz. and 900KHz respectively. Determine: i. The local oscillator frequency ii. Image frequency iii. Image frequency rejection ratio for a pre-selected Q of 80

8M

b) With a neat diagram discuss about local oscillator. 7M





ANTENNAS AND WAVE PROPAGATION

(Electronics and Communication Engineering)



Unit – I

1. a) Differentiate between: i. Directivity & Gain ii. Radiation Intensity & Power density iii. Effective Aperture & Physical Aperture iv. Power pattern &Field Pattern

8M

b) Prove that 퐷 = 2(푛 + 1) is the directivity of an antenna for a source with unidirectional power pattern 푈 = 푈 푐표푠 (휃).

7M

2. a) Derive the relation between Directivity and effective aperture and hence find the effective aperture of an isotropic antenna.

7M

b) Show that Radiation Resistance of Half wave dipole is 73Ω.

8M

Unit – II

3. a) A loop antenna is symmetrically placed on the x-y plane, at z = 0, The wire is assumed to be very thin and the current spatial distribution is Iφ= I0 where I0 is a constant. Derive far field Electric and Magnetic field expressions of loop antenna.

10M

b) Determine array factor for two isotropic sources placed one wavelength apart. Also sketch its pattern.

5M

4. a) Using principle of pattern multiplication determine the pattern of two Collinear, half-Wavelength Spaced Short Dipoles. Also Sketch its waveforms.

7M

b) A linear, End fire, uniform array of ‘푁’ isotropic elements with a separation distance of 푑 between the elements is placed along Z-axis. Derive an expression for directivity of the array.

8M

Unit – III

5. a) Describe the construction and working of Rhombic antenna with neat figures. 8M b) With neat figure, explain helical geometry.

7M 6. a) Explain practical design considerations for the monofilar Axial mode helical antenna. 8M b) With neat diagram and relevant equations explain travelling wave antenna.

7M

Unit – IV

7. a) Write short note on pyramidal Horn antenna. 8M b) With relevant diagram and radiation pattern, explain Yagi Uda Antenna.

7M 8. a) Write a brief note on Lens antenna. 8M b) Explain the different feed systems for a parabolic with neat figures reflector. 7M

Unit – V

9. a) With a neat sketch explain the characteristics of different ionized layers. 8M b) Deduce the relation between Maximum Usable Frequency and skip distance.

7M 10. a) Explain the ground wave propagation with diagram. 5M b) Write Short note on:

i. Virtual Height ii. Skip distance

10M




SIGNAL ANALYSIS AND TRANSFORM TECHNIQUES (Electrical and Electronics Engineering)



Unit – I

1. a) Explain the significance of time compression and expansion. Determine the relationship between the signals x(t) and y(t) in the following figures. 1 a

Fig.1

10M

b) A discrete time signal x[n] is shown in Fig.2. Sketch and label each of the following signals: i. x[n]u[1-n] ii. x[n]u[n+2]-u[n]

Fig.2

5M

2. a) Derive the trigonometric Fourier series from the complex exponential Fourier series. 7M

b) Consider a sequence 4x n n k

. Sketch x[n] and find the Fourier

coefficients ck of x[n].

8M

Unit – II

3. a) Find the Fourier transform and spectrum of the following signals: i. x(t)=cosw0t ii. x(t)=sinw0t

7M

b) State and prove the following properties of DT Fourier transform: i. Convolution ii. Parsevals theorem

8M

Cont…2

:: 2 ::

4. a) Find the Fourier Transform of the following:

i. ( ) sgn( )atx t e t

ii. ( ) sin 5 ( )tx t e tu t

8M

b) Find the Discrete Time Fourier Transform (DTFT) And Inverse DTFT of the following signal: i. 8: ( ) cos sin(2 )

7nFT x n n

ii. 2: ( ) cosID T F T X

7M

Unit – III

5. a) Given x(t)=2u(t-1)-2u(t-3) and h(t)=u(t+1)-2u(t-1)+u(t-3). Find the response y(t). 10M b) Find the step response if the impulse response is given by h[n]=(1/2)nu[n]+(-1/3)nu[n].

5M

6. a) Compute the response of the system where x [ n ] = αnu[n], h[n] = α-nu[-n], 0 <α< 1. 8M b) Consider an integrator whose input x(t) and output y ( t ) are related by:

t

y t x d

i. Find the impulse response h(t) of the integrator ii. Is the integrator stable?

7M

Unit – IV

7. a) Verify time differentiation property of Laplace transform. 5M b) Find the Laplace transform X(s) and sketch the pole-zero plot with the ROC for the

following signal: x ( t ) = e-3tu(t) + e2tu(-t)

10M

8. a) Find the Laplace transform and the associated ROC for each of the following signals: i. 2 5tx t e u t u t

ii. 0kt kT

10M

b) Find the inverse Laplace transform of 2

2 44 3

sX ss s

with ROC -3<Re(s)<-1.

5M

Unit – V

9. a) Explain sampling techniques: i. Flat top sampling ii. Instantaneous sampling

8M

b) Find the Z-transform for the following sequence: i. ( ) ( 1)nx n a u n ii.

)1()()()()( nununx nn

7M

10. a) Find the inverse Z-transform for the following sequence: 2i. ( ) ; 0.52( 1.5 0.5)

zX z zz z

ii. ( ) ; 12(2 3 1)zX z z

z z

7M

b) Find the Z-transform of the following: i. ( ) 2 ( ) 3 ( 1)x n nu n nu n

ii. ( ) co s( ) ( )0x n n u n

8M





POWER SYSTEM TRANSMISSION AND DISTRIBUTION

(Electrical and Electronics Engineering)



Unit – I

1. a) Derive an expression for capacitance of a single phase overhead line. 7M b) A part of the transposition cycle of a 3-phase double circuit line is shown in Fig.1. Radius

of each conductor is 0.9cm. The conductors are solid copper. Find the inductance per phase per km of the line.

Fig.1

8M

2. a) Write a short notes on the following: i. Effect of earth on the capacitance of a transmission line ii. Transposition of conductors

8M

b) Calculate the GMR of a 6/3mm Al, 1/3mm steel ACSR conductor shown in Fig. 2 with six outer conductors of aluminum each of radius r=3mm and one central conductor of steel also of radius r=3mm.

Fig.2

7M

Unit – II

3. a) Write a short note on classification of transmission lines. 6M b) A 3-phase overhead transmission line has a total series impedance per phase of 200

∠800Ω and a total shunt admittance of 0.0013∠900 per phase. The line delivers a load of 80MW at 0.8 p.f lagging and 220KV between the lines. Calculate the following by nominal-T: i. The ABCD constants of the line ii. The sending end voltage, current and power factor of the line and iii. The efficiency of transmission

9M

Cont…2

:: 2 ::

4. a) What are the ABCD constants of a transmission line? Evaluate the ABCD constants for medium line using nominal π method.

10M

b) A 3-phase 50Hz, 300KM long transmission line has the following parameters:r=0.15Ω/km, y=3*10-6/km. If the line is represented by nominal π method, determine the ABCD constants of the line.

5M

Unit – III

5. a) Derive the expression for sag in a freely suspended conductor, when supports are at equal levels.

7M

b) Determine the critical disruptive voltage for a 3phase line operating at 110kV which has a conductor of 1.25cm diameter arranged in a 3.05m delta configuration. Assume air density factor of 1.0 and dielectric strength of air 21kV/cm.

8M

6. a) List the factors affecting the sag in transmission lines. 7M b) The towers of height 30m and 90m respectively support a transmission line conductor at

water crossing. The span is 500m. If the tension in the conductor is 1600Kg. Find the minimum clearance of the conductor and water. Weight of the conductor is 1.5Kg/m. Bases of the towers can be considered to be at water level.

8M

Unit – IV

7. a) Derive the expression for potential distribution for a string having 3 units. 7M b) An insulator string has 3 units each having a safe working voltage of 15kV. The ratio of

self capacitanceto stray capacitance to earth is 10:1. Calculate the safe working voltage of the string and the string efficiency.

8M

8. a) Derive the expression for maximum dielectric stress in two dielectrics of a graded cable in terms of permittivity and radius.

7M

b) Find the most economical conductor diameter of a single core cable to be used on 132kV, 3phasesystem. Also find the overall diameter of the insulation, if the maximum permissible stress is not to exceed 60 kV/cm(peak value).

8M

Unit – V

9. a) Explain the radial distribution system and ring main distribution system. 8M b) A two-conductor street main AB, 500metres in length is fed from both ends at 250volts,

loads of 50A, 60A, 40A and 30A are tapped at distances of 100m, 250m, 350m and 400m from A respectively. If the cross section of the conductors be 1cm2 and specific resistance of the material of the conductors is 1.7 x 10-8 Ω-m, determine the minimum consumer voltage.

7M

10. a) Derive an expression for voltage drop and power loss uniformly loaded DC distributor fed at one end.

6M

b) A DC distributor cable is 1000m long and is loaded as under: i. Distance from the feeding point(metres) “A” : 250 750 1000 ii. Load in amperes : 100 200 300 The resistance of each conductor is 0.025Ω per 1000m (km). Find the voltage at each load print if the voltage at the feeding point A is maintained at 250V.

9M




AC MACHINES-II (Electrical and Electronics Engineering)



Unit – I

1. a) What are the causes of harmonics in the voltage waveform of an alternator? How can these be minimized?

8M

b) Calculate the rms value of the induced emf per phase of a 10 pole, 3 phase 50Hz alternator with 2 slots per pole per phase and 4 conductors per slot in two layers. The coil span is 150°. The flux per pole has fundamental component of 0.12wb and a 20% third harmonic component.

7M

2. a) Deduce the relationship between the number of poles, the frequency and the speed of the armature and write the advantages of stationary armature and rotating field in an alternator.

7M

b) Name the factors responsible for making terminal voltage of an alternator less than induced voltage. Explain them. Describe what is synchronous reactance of an alternator.

8M

Unit – II

3. a) Explain an experimental method of separating stator reactance drop and drop due to armature reaction, when an alternator is loaded.

8M

b) A 3 phase synchronous generator has per phase direct axis synchronous reactance of 1.0P.U and a quadrature axis synchronous reactance of 0.65P.U. Draw a phasor diagram of the machine when operating at full load at a P.F of 0.8 lagging and estimate from there: i. The load angle ii. P.U no load emf Neglect armature resistance.

7M

4. a) Describe the MMF method for predetermining voltage regulation of an alternator. 8M b) A 3 phase, star connected alternator is rated at 1600KVA, 13,500V. The armature

resistance and synchronous reactance are 1.5Ω and 30Ω respectively per phase. Calculate the percentage regulation for a load of 1280KW at 0.8 leading power factor.

7M

Unit – III

5. a) Explain with the help of phasor diagrams, the effect of varying excitation of a synchronous machine connected to infinite bus bars.

8M

b) Two identical 2MVA alternators operate in parallel. The governor of first machine is such that the frequency drops uniformly from 50Hz on no-load to 47.5Hz on full load. The corresponding speed drop of the second machine is 50Hz to 48Hz. How will they share a load of 3MW?

7M

6. a) Derive expressions for Synchronizing power and synchronizing torque when two alternators are connected in parallel.

8M

b) A 3 phase, 11kV, 10MW, star connected synchronous generator has a synchronous impedance of (0.8 + j8)Ω per phase. If the excitation is such that the open circuit voltage is 14kV, determine: i. The maximum output of the generator ii. Current corresponding to maximum power

7M

Cont…2

:: 2 ::

Unit – IV

7. a) Deduce an expression for power developed by a synchronous motor with and without armature resistance

6M

b) A substation operating at its full load of 1000kVA supplies a load of power factor 0.71 lagging. Calculate the permissible additional load at this power factor and the rating of synchronous condenser to raise the substation power factor to 0.87 lagging.

9M

8. a) Why a synchronous motor is not self-starting? Explain any one method of starting a synchronous motor.

7M

b) A 6.6kV, star connected, three phase synchronous motor operates at constant voltage and excitation. The motor operates at 0.8 power factor leading and draws 800kW from the mains. Determine the power factor when the motor draws an increased power of 1200kW from the mains. Synchronous impedance = (2 + j20)Ω per phase.

8M

Unit – V

9. a) Explain double revolving field theory as applied to single phase Induction motors. 8M b) Explain with the help of diagrams constructional features of single phase Induction

motors. Give their classification.

7M

10. a) Describe the construction, working and used of a reluctance motor. 8M b) Describe the constructional features and operating characteristics of a shaded pole

motor. Give its uses.

7M




SOFT COMPUTING (Electrical and Electronics Engineering)



Unit - I 1. a) Explain the following:

i. Activation and synaptic dynamics ii. Structural versus global stability

7M

b) Discuss pattern recognition tasks by competitive learning. What are the different learning methods?

8M

2. a) Explain pattern association and pattern classification problems. 9M b) What is pattern recognition? Explain this with an functional units.

6M

Unit – II 3. a) What is a perceptron? Explain perceptron convergence theorem. 10M b) Explain linear associative network.

5M

4. a) Derive an expression for Backpropagation algorithm. 10M b) Explain the perceptron learning as gradient descent.

5M

Unit – III 5. a) With neat diagram explain analysis of linear autoassociative FF networks. 10M b) Write a note on Boltzmann Machine.

5M

6. a) Explain the Bidirectional associative memory. 10M b) Write a note on SOFM.

5M

Unit – IV 7. a) With neat diagrams explain types of membership functions. 5M b) The two discrete fuzzy sets are:

A=0.15/50+0.25/100+0.5/150+0.7/200andB=0.2/50+0.3 /100+0.6/150+0.65/200 Calculate union, intersection, difference and demorgan’s principle.

10M

8. a) Explain fuzzy set operations with diagrams. 7M b) Explain fuzzy control system with example.

8M

Unit – V 9. a) Suppose S is a similarity relation of domain D, and x, y and z are elements of D.

If S(x,y) ≠ S(y,z), then prove S(x,z)=min ( S(x,y), S(y,z))

10M

b) Discuss possibility based fuzzy relations.

5M

10. Write a note on: i. Fuzzy object oriented databases ii. Genetic Algorithms iii. Evolutionary Algoritms

15M





MANAGERIAL ECONOMICS AND FINANCIAL ANALYSIS

(Mechanical Engineering)



Unit – I

1. a) Define Managerial economics. Write a short note on nature of ME. 7M b) What is elasticity of demand? What are the determinants of demand?

8M

2. a) Write short notes on: i. Survey method of forecasting ii. Expert opinion Method

10M

b) The demand function for chocolate is, Qd=400-4P, where Qd=Quantity demanded for chocolates in week, P=Price of the chocolate per packet: i. Construct a demand curve assuming price of Rs. 10, 12, 15, 20 and 25 per packet ii. At what price will the demand be zero

5M

Unit – II

3. a) Explain the concept of production function. Discuss the production function based on cobb-douglas theories. Sketch the shape of the production function curves for the cobb-douglas type.

9M

b) Mention the three principles involved in the operations of economies of scale. Discuss its applicability in business environments.

6M

4. a) Distinguish between fixed costs and variable costs with the help of a neat figure. Indicate total cost in figure.

7M

b) What is breakeven point? What are the benefits of Break-even analysis.

8M

Unit – III

5. a) Describe the features of monopoly. 5M b) Explain price and output determination in a perfectly competitive market with the help of

suitable graphs.

10M

6. a) Explain the factors that determine the degree of price discrimination. 6M b) List the various methods of pricing and explain any two in detail.

9M

Unit – IV

7. What are the three principle forms of business organization? What are the advantages and disadvantages of each?

15M

8. a) What is capital budgeting? What is its significance for a firm? 5M b) A project Delta cost Rs. 5000 now and is expected to generate year-end cash inflows of

Rs.1500, Rs.2000, Rs.2800, Rs.2700 and Rs.2900 in years 1 through 5. The opportunity cost of capital may be assumed to be 10%. Using NPV method suggests the owner to accept or reject the investment in project Delta.

10M

Cont….2

:: 2 ::

Unit – V

9. a) Explain the objectives of book keeping and differentiate between accounting and double entry system.

5M

b) A company having certain reserves and surplus has following year end details.

Equity shares 200000 Bills payable 20000 Bank Balance 10000 Plant and equipment 80000 Dividend payable 72000 Bills receivable 20000 Provision for tax 40000 Creditors 55000 Preference shares 135000 General reserves 40000 Land and building 200000 Cash in hand 15000 Debtors 160000 Stock 77000

Prepare the balance sheet.

10M

10. a) Explain different types of Liquidity ratio. 6M b) A company has the following data, net earnings after taxes is Rs 600000, preference

dividends Rs 100000, dividends to ordinary shareholders is Rs 300000, market price per share is Rs. 100 Find: i. Earnings per share if dividend per share is Rs 5 ii. P/E ratio

9M





DYNAMICS OF MACHINERY

(Mechanical Engineering)



Unit – I

1. a) What is a gyroscope? Mention the applications of gyroscope. With usual notations, obtain an expression for the gyroscopic couple.

7M

b) A ship is propelled by a turbine rotor which has a mass of 5000kg and has a speed of 2100rpm. The rotor has a radius of gyration of 0.5m and rotates in clockwise direction when viewed from the stern. Find the gyroscopic couple and its effect when: i. The ship pitches 60 above and 60 below the horizontal position. The bow descends

with its maximum velocity. The pitching motion is SHM with a periodic time of 20 seconds

ii. The ship rolls at a certain instant with an angular velocity of 0.03rad/sec clockwise when viewed from the stern

8M

2. a) An effort of 1500N is required to just move a certain body up an inclined plane of angle 120, force acting parallel to the plane. If the angle of inclination is increased to 150, then the effort required is 1720N. Find the weight of the body and the coefficient of friction.

8M

b) What is lubrication? Explain the differences between thin film lubrication, boundary lubrication and fluid film lubrication.

7M

Unit – II

3. a) With the help of a neat diagram explain the working of a single plate clutch. 7M b) A single plate clutch transmits 25kW at 900rpm. The maximum pressure intensity

between the plates is 85 KN/m2. The outer diameter of the plate is 360mm. Both sides of the plate are effective and the coefficient of friction is 0.25. Determine: i. The inner diameter of the plate ii. The axial force to engage the clutch

8M

4. a) With the help of a neat diagram explain the working of a simple band brake. 7M b) A bicycle and rider, travelling at 12KMPH on a level road have a mass of 105kg. A brake is

applied to the rear wheel which is 800mm in diameter. The pressure on the brake is 80N and the coefficient of friction is 0.06. Find the distance covered by the bicycle and number of turns of its wheel before coming to rest.

8M

Unit – III

5. a) Explain the terms: i. Sensitiveness ii. Hunting iii. Isochronism

3M

b) In a hartnell governor the length of ball and sleeve arms are 12cm and 10cm respectively. The distance of fulcrum of the bell crank lever from the governor axis is 14cm. Mass of each governor ball is 4kg. When the governor runs at the mean speed of 300rpm, the ball arm is vertical and sleeve arm is horizontal? For increase of speed of 4% the sleeve moves 10mm upward. Neglecting friction, find: i. Minimum equilibrium speed, if total sleeve movement is 20mm ii. Spring stiffness iii. Sensitiveness of governor

12M

Cont…2

:: 2 ::

6. a) Show that emax = KsIω/100 and hence prove emax=0.02KsE where emax is Maximum fluctuation of energy, Ks is total fluctuation of speed and E is mean kinetic energy.

5M

b) A shaft fitted with a fly wheel rotates at 240rpm and drives a machine. The torque of the machine varies in a cyclic manner over a period of three revolutions. The torque rises from 1000Nm to 4000Nm uniformly during half revolution and remains constant during the following one revolution, it then falls uniformly to 1000Nm during the next half revolution and remains constant for one revolution. This being repeated thereafter, Determine: i. Power required to drive the machine ii. % age fluctuation of speed The driving torque applied to the shaft is constant and the mass of the fly wheel is 520kg with radius of gyration 625mm. Design the flywheel rim if width is 4 times the thickness.

10M

Unit – IV

7. A system of rotating masses which is in complete dynamic balance has magnitudes of 5kg, 6kg, Mkg and 8kg and revolve in planes A, B, C and D. The planes B, C and D are at distances of 0.3m, 1.2m and 2.0m respectively from A. All the masses are at the same radii of 0.3m. Find the magnitudes of M and relative angular position of all the masses for complete balance.

15M

8. The pistons of a 4-cylinder vertical in line engine reach their uppermost position at 900 interval in order of their axial position. Pitch of the cylinder=0.35m. Crank radius=0.12m. Length of Connecting rod=0.42m. The engine runs at 600rpm. If the reciprocating parts of each cylinder is 2.5kg, find the unbalanced primary and secondary forces and couples. Take the central plane of the engine as reference plane.

15M

Unit – V

9. a) What are the causes and effects of mechanical vibrations? 7M b) Determine the equivalent spring stiffness and the natural frequency of the vibrating

system when a mass of 10kg is: i. Fixed in between two springs of stiffness 5N/mm and 8N/mm ii. Supported by two springs of each stiffness 5N/mm which are in series

8M

10. a) With neat sketches, discuss the critical speeds and phase angle relationships for undamped case.

7M

b) A rotor has a mass of 12Kg and is mounted midway on a horizontal shaft of 24mm simply supported at the ends by two bearings. The bearings are 1 m apart. The shaft rotates at 1200rpm. The mass center of the rotor is 0.11mm away from the geometric center of the rotor due to certain manufacturing errors. Determine the amplitude of steady state vibrations and dynamic force transmitted to the bearings if E=200 GN/m2.

8M





MACHINE TOOLS (Mechanical Engineering)



Unit – I

1. a) Explain with a neat sketch mechanism of chip formation in ductile material and explain different types of chips.

7M

b) When cast steel is machined in lathe the following conditions observed. Chip thickness 0.62mm, feed 0.2mm, rake angle 15o. Calculate chip thickness reduction ratio and shear angle when cutting is pure orthogonal.

8M

2. a) Sketch and explain geometry of single point cutting tool. 7M b) List and explain different cutting tool materials.

8M

Unit – II

3. a) How lathes are specified? And differentiate Capstan and Turret lathes. 12M b) List taper turning methods used in lathe.

3M

4. a) Draw a neat sketch of turret indexing mechanism and explain functioning. 7M b) A manufacturing industry wants to give consultancy to you to make hexagonal bolts of

1000 in no’s. Before approval they want to know how to manufacture hexagonal bolts in step by step procedure using lathes. Give a solution.

8M

Unit – III

5. a) What is planing? Explain the working principle of a planer. 7M b) Find the time required for taking a complete cut on a plate (600 X 900)mm, if the cutting

speed is 9m/min. The return time to cutting time ratio is 1:4, and the feed is 3mm. The clearance at each end is 75mm.

8M

6. a) Explain the features of a horizontal milling machine and its working with the help of a neat sketch.

10M

b) Briefly explain compound indexing method.

5M

Unit – IV

7. a) Explain with a neat sketch the Drill tool nomenclature. 7M b) Draw a neat sketch of surface grinding machine and explain its working.

8M

8. a) Illustrate the salient design features of vertical precision boring machine. 8M b) Explain the terms grit, grade and structure of a grinding wheel.

7M

Unit – V

9. a) What is honing process? What are the critical honing process parameters? 8M b) List out the advantages of employing jigs and fixtures in mass production.

7M

10. a) List and explain basic principles of location. 7M b) Explain six pin method of location with a neat sketch during machining. 8M




THERMAL ENGINEERING-II (Mechanical Engineering)



Unit – I

1. a) Name the methods to improve the thermal efficiency of Rankine cycle. 5M b) In a steam power cycle the steam supply is at 15bar and dry and saturated. The

Compressor pressure is 0.4bar. Calculate the Carnot and Rankine efficiencies of the cycle. Neglect pump work.

10M

2. a) Define adiabatic flame temperature. 5M b) The percentage composition of sample of liquid fuel by weight is C=84.8% and H2=15.2%.

Calculate: i. The weight of air needed for the combustion of 1kg. of fuel ii. The volumetric composition of the products of combustion if 15%excess air is supplied

10M

Unit – II

3. a) With neat sketch explain Air Preheater in a boiler. 8M b) Explain the working principle of Lamont Boiler with a neat sketch.

7M

4. a) Define nozzle efficiency and velocity coefficient. Write short notes on functions of nozzle. 5M b) Dry saturated steam at a pressure of 11bar enters a convergent and divergent nozzle and

leaves at a pressure of 2 bar. If the flow is adiabatic and frictionless, determine: i. The exit velocity of steam ii. Ratio of cross section at exit and that of throat. Assume the adiabatic expansion to be 1.135

10M

Unit – III

5. a) With neat sketch explain surface condenser. 9M b) Exhaust steam having a quality of 0.9 enters a surface condenser at an absolute pressure

of 0.13bar and comes out as water at 450C. The circulating water enters at 300C and leaves at 400C. Estimate the quantity of circulating water required and condenser efficiency.

6M

6. a) Explain pressure compounding with neat sketch. 8M b) In a stage of an Impulse turbine provided with a single row wheel, the mean diameter of

the blade ring is 800mm and the speed of rotation is 3000rpm. The steam issues from the nozzles with a velocity of 300m/s and the nozzle angle is 200. The rotor blades are equiangular and the blade friction factor is 0.86. What is the power developed in the blading when the axial thrust on the blades is 140 Newton?

7M

Unit – IV

7. a) Explain the difference between an impulse turbine and reaction turbine. 7M b) Define the term degree of reaction as applied to a steam turbine. Show that for a Parson’s

reaction turbine the degree of reaction is 50%. 8M

Cont…2

:: 2 ::

8. a) Discuss briefly the methods employed for improvement of thermal efficiency of open

cycle gas turbine plant. 8M

b) In a gas turbine the compressor takes in air at a temperature of 15°C and compresses it to four times the initial pressure with an isentropic efficiency of 82%. The air is then passes through a heat exchanger heated by the turbine exhaust before reaching the combustion chamber. In the heat exchanger 78% of the available heat is given to the air. The maximum temperature after constant pressure combustion is 600°C, and the efficiency of the turbine is 70%. Neglecting all losses except those mentioned, and assuming the working fluid throughout the cycle to have the characteristic of air find the efficiency of the cycle. Assume R=0.287kJ/kgK and γ=1.4 for air and constant specific heats throughout.

7M

Unit – V

9. a) Write the classification of jet propulsive engines. 3M b) The following data pertain to a turbojet flying at an altitude of 9500m, speed of the

turbojet is 800km/h, propulsive efficiency is 55%, overall efficiency of the turbine plant is 17%, density of air at 9500m altitude is 0.17kg/m3, drag on the plane is 6100N, assuming calorific value of the fuels used as 46000kJ/kg, calculate: i. Absolute velocity of the jet ii. Volume of air compressed per min iii. Diameter of the jet iv. Power output of the unit v. Air fuel ratio

12M

10. a) Give the classification of a Rocket engines. 6M b) With a neat sketch show the components of a general Rocket. 9M




DESIGN OF MACHINE MEMBERS-I (Mechanical Engineering)



Unit – I

1. a) State and explain Guest theory (Maximum shear stress theory) for ductile materials. 5M b) A rectangular component of 30mm width and 40mm depth and having a length of

400mm is rigidly fixed at one of its ends. Other end is subjected to a bending load of 8kN and an axial load of 10kN. Determine the factor of safety adopted based on Maximum normal stress theory and maximum shear stress theory if the material has an Yield strength of 680MPa.

10M

2. a) Differentiate between design for strength and design for rigidity in tension, bending and torsion.

6M

b) A circular steel shaft of 50mm diameter and length 450mm is fixed at one of its end is subjected to an axial load of 15kN and bending load of 5kN at its other end. Calculate the direct and bending normal stresses. Calculate the combined normal stresses. Also calculate the normal and shear strains. Take E=200GPa and G=80GPa.

9M

Unit – II

3. a) Briefly explain the various methods of reducing the stress concentration. 5M b) A stepped shaft down from 60mm diameter to 40mm diameter with a fillet radius of

8mm rotates at 2000rpm. Find the safe power that can be transmitted by this shaft limited shear stress to 60MPa.

10M

4. a) Define the following: i. Stress Amplitude ii. Stress Ratio iii. Amplitude Ratio

6M

b) A shaft of circular cross section of diameter 1.5d is stepped down to diameter ‘d’ with a fillet produces an stress concentration factor [Kf] of 1.22. The shaft is subjected to torsion. The material has a yield point stress as 336MPa and endurance strength as 375MPa. Determine the size of the shaft required for a torque, which varies from 0 to 2.26kN-m. Use FOS=2.0. Take B=C=0.85, q=0.9.

9M

Unit – III

5. a) What are the stresses to be considered in designing of threaded fastener? 5M b) A flat circular plate is used to close the flanged end of a pressure vessel of internal

diameter 300mm. The vessel carries a fluid at a pressure of 0.7N/mm2. A soft copper gasket is used to make the joint leak proof. Twelve bolts are used to fasten the cover plate onto the pressure vessel. Find the size of the bolts limiting the stress to 100N/mm2. Note: Take initial tightening for leak proof joint as Fi=2804.7d where d is the bolt diameter. Also take the actual load on to bolt as 0.6 times the load exerted.

10M

Cont…2

:: 2 ::

6. a) A plate of 80mm wide and 10mm thick is to be welded to another plate by means of two parallel fillet welds. The plates are subjected to a load of 50kN. Find the length of the weld so that the maximum stress does not exceed 50N/mm2. Consider the joint under static and dynamic loading with stress concentration factor for dynamic loading to be taken as 2.7.

7M

b) Design a double riveted but joint with two cover plates for the longitudinal seam of boiler shell 1.5m in diameter subjected to a steam pressure of 0.95N/mm2. Assume efficiency of 75 %. Allowable tensile stress in the plate is 90N/mm2. Use h=PfDi/2σo+c.

8M

Unit – IV

7. a) Design cotter joint with sleeve to connect two axial rods subjected to an axial pull of 60kN. The allowable stress of C30 material used for the rods and cotters are: Tensile strength=65N/mm2, Shear strength=35N/mm2. Cast steel used for the sleeve has an allowable tensile strength of 70N/mm2, Compressive strength of 110N/mm2 and shear strength of 45 N/mm2.

7M

b) Design the assembly of knuckle joint to connect two mild steel rods subjected to an axial load of 100kN. The allowable stresses for the rods and pin are 100MPa, 130MPa and 60MPa in tension, compression and shear respectively.

8M

8. a) Compare a hollow shaft having internal diameter half the external diameter and whose external diameter is equal to that of solid shaft having same length and material for torque transmission capacity and weight.

3M

b) A C50Mn Steel with yield strength of 392.3MPa transmits 15kW at 210rpm. It is supported between two bearings 750mm apart and has two gears keyed to it. The pinion having 24 teeth and module 6mm is located 100mm to the left of right hand bearing. This gear delivers horizontally to the right when viewed from the left hand bearing. The gear having 80 teeth of module 6mm is located 150mm to the right of left bearing and receives from a pinion in a vertical direction from below. Take shock factors in bending and torsion as 1.75 and 1.25 respectively. Pressure angle of the gear is 18o (Diameter of the gear is given by the product of module and number of teeth, d=mz). Maximum allowable shear stress is τmax=0.75*0.3*σyt.

12M

Unit – V

9. a) What are the requirements of a good coupling? 5M b) Design a bush – pin type flanged coupling to transmit 15kW at 2000rpm. Draw a neat

sketch of the coupling. Maximum torque to be transmitted is 30% more than the mean torque. Assume C-40 Steel for shaft and bolts and take FOS=2.5.

10M

10. a) Explain the phenomenon of ‘nipping’ in leaf springs. 5M b) A railway wagon weighing 50kN moving with a speed of 8km/hour is brought to rest by

four buffer springs in which the maximum compression allowed is 220mm. Find force and the number of coils in each spring having a mean diameter of 150mm. The diameter of the spring wire can be taken as 25mm. Take G=84GPa.

10M




METROLOGY AND SURFACE ENGINEERING (Mechanical Engineering)



Unit - I 1. a) Explain with neat sketches the hole and shaft basis system. 8M b) Explain the concept of interchangeability with an example.

7M

2. a) List the different types of fits. Elaborate, clearance fit with neat sketch. 8M b) Define tolerance and explain the importance of the same.

7M

Unit – II 3. a) What is the difference between line standard and end standard? How will you compare

an end standard with a line standard? 8M

b) Explain the method of calibration of slip gauges.

7M

4. a) With the help of a neat sketch explain the working principle of a dial indicator. 7M b) Calculate the dimensions of plug and ring gauges to control the production of 50mm shaft

and hole pair of H7d8 as per I.S specification. The following assumptions maybe made, 50mm lies in diameter step of 30 and 50mm and the upper deviation for ‘d’ shaft is given by -16D0.44 (microns) and lower deviation for hole H is zero. Tolerance factor i (microns)=0.45(D)1/3+0.001D, IT7=16i and IT8=25i.

8M

Unit – III 5. a) Explain with a neat sketch construction & working of optical projector. 8M b) With a neat sketch, explain the working of autocollimator.

7M

6. a) Explain the procedure of measuring angle of thread and thread pitch. 7M b) Explain the working of interferometers with neat sketch.

8M

Unit – IV 7. a) Discuss what you understand by the following terms in connection with surface finish

measurement: i. Waviness ii. Lay iii. Envelope method iv. Crest line method

8M

b) How does the Tomlinson surface recorder and Talysurf machine work? What are their relative merits?

7M

8. a) Describe mechanical comparator and clearly explain the magnification method adopted in it.

8M

b) Explain with a neat sketch the working principle of Johansson ‘ Mikrokator’.

7M

Unit – V 9. a) Describe the features of Co-ordinate measuring machine(CMM). 8M b) List and explain any two application of Co-ordinate measuring machine(CMM).

7M

10. a) List out different surface treatment processes. Briefly discuss. 7M b) Explain the various methods of measurement of wear. 8M




AIR TRANSPORTATION SYSTEMS (Aeronautical Engineering)



Unit – I

1. a) Define Aerospace industry and Air transport industry. 3M b) Describe the factors affecting commercial transport sale.

12M

2. Define ‘oligopoligy’. Why is the airline industry characterized as an oligopoligy? Briefly explain.

15M

Unit – II

3. a) How do earth’s physical issues affect surface, core, continents? 7M b) What are the gaseous properties in earth atmosphere and explain the weather effects on

navigation.

8M

4. a) Elaborate how the how environmental hazards effect the earth surface. 7M b) Give an account of effect of different atmospheric conditions on navigation.

8M

Unit – III

5. a) What is range? Explain balancing efficiency and effectiveness of pay load and range. 5M b) Explain effect of cabin dimensions and flight deck.

10M

6. a) Write notes on wake vortices, cabin dimensions and flight deck. 10M b) Describe Instrument landing system (ILS).

5M

Unit – IV

7. a) What is airline scheduling? What are the factors affecting airline scheduling? 7M b) What is airline fleet planning? What are the aspects that have to considered while fleet

planning?

8M

8. a) Describe the characteristics of a modern airport. 7M b) What is runway capacity? Evaluate runway capacity.

8M

Unit – V

9. Write notes on categories of airspace and airspace sectors.

15M

10. a) What is an Air Traffic Control system and its different types? 10M b) Write a note on financial viability regulatory and compliance. 5M




AEROSPACE PROPULSION-I (Aeronautical Engineering)



Unit – I

1. a) Explain working principle of turbojet engine with aid of thermodynamic cycle. 10M b) Derive thrust equation for a gas turbine.

5M

2. a) Explain working principle of turbofan engine with help of sketch. 10M b) Write a short on performance characteristics of jet engine.

5M

Unit – II

3. a) Explain boundary layer separation. 5M b) Explain subsonic inlet nomenclature with help of neat sketch.

10M

4. a) Discuss reverse nozzle diffuser and starting problem in supersonic inlets. 7M b) Discuss subsonic inlet performance criterion.

8M

Unit – III

5. a) Explain briefly the classification of combustion chambers. 5M b) List and explain requirements of the combustion chamber.

10M

6. a) Write a note on combustion chamber performance. 5M b) Explain the flow pattern in the primary zone with the help of neat sketch.

10M

Unit – IV

7. a) Write a note on rocket nozzle classification. 5M b) Explain the concept of after burner and write a note how exhaust variable nozzles are

used.

10M

8. a) Write a note on over expanded nozzles. 5M b) Air at temperature 284K and atmospheric pressure flows isentropically through a

convergent-divergent nozzle. The velocity at the inlet is 150m/s and the inlet area is 10cm^2. If the flow at the exit is supersonic find: i. The Mach number at inlet ii. Stagnation temperature and pressure iii. The temperature and Pressure at throat iv. The velocity and Mach Number at the exit if 2 220T K v. The area of the throat

10M

Cont…2

:: 2 ::

Unit – V

9. a) Represent complete flow features of an axial flow compressor on h-s plots and explain the salient features.

5M

b) An axial flow compressor stage where the flow process is adiabatic and the axial velocity component is constant. The stage operating conditions are: Mass flow rate m = 2.2 kg/s Rotational speed (N) = 36000 rpm Inlet Total Temperature 01T = 450 K

Inlet Total Pressure bar 01P =2.8 bar Rotor wise loss in total relative pressure = 12.28% Stator flow process is is-entropic Stator critical Mach number = 0.68 Stator exit absolute flow angle 1 0

Rotor exit relative flow angle 01 25

Assuming an average specific heat ratio is 1.4. Calculate: i. Stage total-to total efficiency ii. Torque transmitted to the compressor stage iii. rotor exit static pressure iv. If the rotor-blade incidence angle is 012 determine the blade inlet angle

10M

10. a) Explain the effect of exit blade angle on the work input for the case of centrifugal compressors.

5M

b) A Centrifugal compressor stage is equipped with a totally radial impeller (ie, one with no appreciable axial velocity component anywhere), the stage geometrical data and operating conditions are as follows: Mass flow rate (dot m) = 2.5 kg/s shaft speed N = 22000 rpm Impeller Inlet Total Pressure 1.09 bar Impeller Inlet Total Temperature 300 K Side Wall Spacing B = 2.2 cm Impeller Inlet Blade Angle 0

1 52

Impeller Exit Blade Angle 02 55

Impeller Inlet Flow Is Assumed Incompressible Impeller Inlet Velocity Is Totally Raidal 1 0

Impeller Inlet Radius 1 8R Cm

Impeller Exit Radius 2 20R Cm Impeller Total To Total Pressure Ratio = 3.6 Impeller Total To Total Efficiency = 78% Assuming specific heat ratio as 1.4, calculate: i. The incidence caused total pressure loss ii. Blade exit deviation angle iii. Specific speed iv. Torque v. Exit/ Inlet total relative temperature ratio

10M




AERODYNAMICS-II (Aeronautical Engineering)



Unit - I 1. a) Define Mach number. Describe the different aerodynamic flows with reference to Mach

number regimes. 10M

b) Write a short note on aerodynamic heating.

5M

2. a) A high-speed aircraft is cruising in still air. How does the temperature of air at the nose of the aircraft differ from the temperature of air at some distance from the aircraft? Explain.

5M

b) At a given instant of time, two pressure waves, each moving with the speed of sound, emitted by a point source moving with constant velocity in a fluid at rest are shown in Fig.1. Determine the Mach number involved and indicate with a sketch the instantaneous location of the point source.

Fig.1

10M

Unit – II 3. a) What is area-Mach number relation in nozzle flow? Deduce.

12 1

22

1 2 111 2

A MA M

10M

b) Consider the supersonic flow through a convergent-divergent nozzle with an exit-to-throat area ratio of 10:25. The reservoir pressure and temperature are 5atm and 600C, respectively. Calculate M, p, and T at the nozzle exit.

5M

4. Describe features of a supersonic wind tunnel and derive ,1 0,1

,2 0,2

t

t

A PA P

15M

Unit – III 5. a) Consider supersonic flow impinging on the rounded nose of an aircraft. Will the oblique

shock that forms in front of the nose be an attached or detached shock? Explain. 7M

b) A uniform supersonic flow of air (γ=1.4) at Mach 2.6, with stagnation pressure of 5MPa and stagnation temperature of 1000K, expands around a 20 convex corner. Determine the downstream Mach number, the stagnation pressure and temperature, and the static pressure and temperature.

8M

Cont…2

::2::

6. Explain the following with relevant sketches:

i. Critical Mach number ii. Drag-Divergence Mach number and sound barrier iii. The supercritical airfoil

15M

Unit – IV 7. a) With a neat sketch obtain the lift and wave-drag coefficients for the supersonic flow over

a flat plate. 10M

b) Write a short note on supersonic airfoil drag.

5M

8. Derive lift and drag of wings at hypersonic speeds: deduce 22sinPC

15M

Unit – V 9. Explain in detail the smoke and tuft flow visual visualization techniques Write a short note on

Errors in Concentration Measurements.

15M

10. Define a wind tunnel and write its classifications, with a neat sketch explain any one of the wind tunel.

15M




FLIGHT MECHANICS-II (Aeronautical Engineering)



Unit - I 1. a) What is degrees of freedom of a Aircraft system? Discuss the need for stability in

airplanes. 8M

b) Discuss the purpose of control system in airplanes and explain the primary control surfaces and secondary control surfaces.

7M

2. a) Discuss the equation governing the translation and rotational motion of airplane. 8M b) Write short notes on marginally stable airplane.

7M

Unit – II 3. Derive aerodynamic stability derivative for change in forward speed.

15M

4. Explain in detail aircraft longitudinal transfer functions.

15M

Unit – III 5. a) Explain aerodynamic balancing of control surface. 7M b) Write short notes on maneuver points and explain pull up maneuver.

8M

6. Derive the Hinge moment co-efficient equation and draw a typical hinge moment curves.

15M

Unit – IV 7. Derive the basic longitudinal equilibrium equation and neatly explain the contributions of

wing, fuselage and tail.

15M

8. Explain the variation of elevator angle versus equilibrium lift coefficient.

15M

Unit – V 9. a) Write short notes on one engine inoperative condition and rudder lock. 7M b) Why directional control is required for an aircraft?

8M

10. a) Explain spiral approximation and Dutch roll approximation with suitable figures. 10M b) Explain the following:

i. Dihedral effect ii. Long period oscillation mode

5M




AEROSPACE VEHICLE STRUCTURES-II (Aeronautical Engineering)



Unit - I 1. a) Explain monococque and semi monocoque structures. 10M b) State and explain principle of virtual work.

5M

2. a) Explain Semi tension and complete tension field beams. 10M b) Explain the concept of 1 1 2 2 ...R R n nP P P P

5M

Unit – II 3. a) Briefly explain types of wings and fuselages. 6M b) The beam shown in Fig.1 below is assumed to have a complete tension field web. If the

cross-elastic section modulus of each flange is 750mm3, determine the maximum stress in a flange and also whether or not the stiffeners will buckle. The thickness of the web is 2mm and the second moment of area of a stiffener about an axis in the plane of the web is 2000 mm4, E=70 000 N/mm2:

Fig.1

9M

4. a) Write a short note on shear resistant web beams. 8M b) Explain the concept of stability of stiffened panels. 7M

Unit – III 5. a) Determine the horizontal and vertical components of the tip deflection of the cantilever

shown in Fig.2 the second moments of area of its unsymmetrical section are Ixx, Lyy and Lxy:

Fig.2

8M

b) Derive an expression for load intensity, shear force and bending moment relationships.

7M

6. Explain the concept of shear flow beams with on axis of symmetry or unsymmetrical box beam.

15M

Cont…2

::2::

Unit – IV 7. a) Determine the direct stress distribution in the thin-walled Z-section shown in Fig.3

produced by a positive bending moment Mx:

Fig.3

7M

b) The fuselage section shown in Fig.4 is subjected to a bending moment of 100kNm applied in the vertical plane of symmetry. If the section has been completely idealized into a combination of direct stress carrying booms and shear stress only carrying panels, determine the direct stress in each boom:

Fig.4

8M

8. a) Derive an expression for torsion bending equation. 10M b) Explain structural idealization of wing.

5M

Unit – V 9. The cantilever beam shown in Fig.5 is uniformly tapered along its length in both x and y

directions and carries a load of 100kN at its free end. Calculate the forces in the booms and the shear flow distribution in the walls at a section 2m from the built-in end if the booms resist all the direct stresses while the walls are effective only in shear. Each corner boom has a cross-sectional area of 900mm2 while both central booms have cross-sectional areas of 1200mm’:

(a)

(b)

15M

Fig.5

10. The fuselage of a light passenger carrying aircraft has the circular cross-section shown in Fig.6 The cross-sectional area of each stringer is 100mm2 and the vertical distances given in Fig.6 are to the mid-line of the section wall at the corresponding stringer position. If the fuselage is subjected to a bending moment of 200kNm applied in the vertical plane of symmetry, at this section, calculate the direct stress distribution:

Fig.6

15M




INTRODUCTION TO SPACE TECHNOLOGY (Aeronautical Engineering)



Unit - I 1. a) Explain in detail a launch vehicle. Mention few examples. 7M b) What are the different factors affecting launch vehicle selection?

8M

2. What are the different types of space missions? Explain each briefly?

15M

Unit – II 3. a) Explain the principle of rocket propulsion. 8M b) Explain the working of Solid rocket propellant.

7M

4. Consider a rocket of mass m, moving at velocity v and subject to external forces F (typically gravity and drag). The rocket mass changes at a rate dm/dt, with a velocity vector c relative to the rocket. Derive the rocket equation.

15M

Unit – III 5. What do you mean by gravity turn trajectory? Discuss it in detail.

15M

6. a) Explain in detail about sounding rockets. 7M b) What are the different propulsive systems used in rockets? Explain each of them with a

neat diagram.

8M

Unit – IV 7. In orbital mechanics , explain:

i. Conic section ii. Orbital elements and iii. Types of Orbits

15M

8. What is orbital maneuver and what are transfer orbits?

15M

Unit – V 9. a) Explain how attitude is determined and controlled in a spacecraft. 7M b) Explain working principle of Dual spin space craft.

8M

10. a) What do you mean by gravity gradient satellites? Discuss in detail. 7M b) What do you mean by satellite spin? 8M




DESIGN OF REINFORCED CONCRETE STRUCTURE

(Civil Engineering)

Date: 07 May, 2016 FN Time: 3 hours Max Marks: 75


Unit - I 1. a) What are stress block parameters? Obtain expressions for them in singly RC beam and

doubly RC beam. 10M

b) Show that Xulim=0.48d for Fe415 steel.

5M

2. a) Explain tension failure and compression failure in limit state design for flexure. 5M b) What are characteristic values? Explain them with the help of normal distribution curves.

10M

Unit – II 3. A beam 200X200mm, effective; carries a factored moment of 32kN-m at a section. Find steel

required if concrete M20 and steel Fe500 are used. Assume d’=30mm.

15M

4. Determine the moment of resistance of a T-beam with the following data: i. Bf =1500mm ii. Df=100mm iii. Bw=300mm iv. Dw=700mm v. Ast=4510mm2 Use concrete M20 and Fe 415 steel.

15M

Unit – III 5. a) A cantilever beam has a section 250mmx350mm and is reinforced with 2 bars of 22mm

dia in tension zone and 2 bars of 18mm dia in the compression zone. At the critical section the factored shear is 110kN. Design the shear reinforcement at the critical section. Assume the cover as 50mm and the materials, M25 grade concrete and Fe415 grade steel. Sketch the cross section details of the beam.

11M

b) Determine the development length for 20mm diameter high strength deformed bar of grade Fe500 subjected to tension, if M20grade concrete is used.

4M

6. A rectangular simply supported beam of clear span 4.8m is 360mmx580 mm in cross section. It is reinforced on tension side with 6 bars of 20mm diameter. Calculate the short term deflection. Use M20 grade concrete and Fe 415 grade steel. The effective cover is 40mm. Take superimposed live load as 28kN/m and superimposed dead load as 20kN/m.

15M

Unit – IV 7. a) Explain the function of the transverse reinforcement in an RC column. 5M b) An RC short column of 2.74m effective length carries an axial load of 1600kN. Design the

column for M20 grade concrete and Fe415 grade steel.

10M

8. A rectangular RC column of 600mmx400mm carries an axial load of 800kN. Design a rectangular footing to support the column. Take Safe Bearing Capacity (SBC) of soil as 200kN/m2. Assume M25 grade concrete and Fe 415grade steel.

15M

Cont…2

::2::

Unit – V

9. Design a two way slab for an office building with the following data: i. Size of room=4X6m ii. Edge condition = two adjacent edges discontinuous iii. Materials=M20 concrete and Fe415 steel iv. Live load=4 kN/m2 Sketch the details of steel.

15M

10. Design the one-way continuous slab having three spans of 3m c/c spacing between the supporting beams of width 300mm, slabs are subjected to uniformly distributed imposed loads of 5KN/m2. Adopt M20 concrete and Fe415 steel. Sketch the details of reinforcement.

15M




GEO TECHNICAL ENGINEERING-I (Civil Engineering)



Unit - I 1. a) Describe the physical and chemical process of soil formation. 7M b) With the help of three phase diagram, explain the terms:

i. Voids ratio ii. Specific gravity iii. Percentage air voids

8M

2. a) List out the fundamentals of clay minerals, explain any two of them with a neat sketch 7M b) A partially saturated sample from a borrow pit has natural water content=10%, bulk unit

weight=17kN/m3, G=2.67, calculate: i. Degree of saturation ii. Voids ratio iii. Saturated unit weight iv. Submerged unit weight

8M

Unit – II 3. a) List and explain the factors affecting the permeability of soils. 8M b) In a falling head permeability test on a clay sample, the following results were

obtained: Length of sample=12cm, Diameter of sample=8cm, Diameter of stand pipe=0.4cm, Initial head of water in stand pipe=120cm, Final head of water in stand pipe=40cm, Time of fall in head=6minutes. Find the coefficient of permeability of the soil.

7M

4. a) Explain the phenomenon of Quick Sand condition. 5M b) A soil stratum with permeability K=5×10-5m/sec overlies an impermeable stratum. The

impermeable stratum lies at a depth of 18m below the ground surface. A sheet pile wall penetrates 8m into the permeable soil stratum. Water stands to a height of 9m on upstream side and 1.5m on downstream side, above the surface of soil stratum. Sketch the flow net and determine quantity of seepage.

10M

Unit – III 5. a) Define compaction .Discuss the various factors that affect compaction. 6M b) The following data have been obtained in a standard laboratory proctor compaction test

on glacial tilt:

Water content (w%) 5.02 8.81 11.25 13.05 14.40 19.25 Weight of wet sample(kg) 1.602 1.752 1.954 2.022 2.029 1.929

Take Gs=2.77, the container is 944 cm3 in volume. Plot the compaction curve and determine the optimum moisture content. Also compute the void ratio and degree of saturation at optimum conditions.

9M

Cont…2

::2::

6. a) Explain casagrande’s method of determining pre-consolidation pressure in clays. 7M b) Define the terms with relevant expressions:

i. Coefficient of consolidation ii. Coefficient of volume change iii. Compression index iv. Coefficient of compressibility

8M

Unit – IV 7. a) List the assumptions and limitations of Boussinesq’s theory of stresses in soils. 8M b) A point load of 1000kN acts at the ground surface. Compute the vertical stresses at 8m

depth: i. On the axis of the load ii. 2m away from the axis Use Boussinesq’s equations.

7M

8. a) What do you understand by “pressure bulb”? Illustrate with sketch. 7M b) Discuss the principle of construction of Newmark’s chart. Explain its uses.

8M

Unit – V 9. a) Explain Mohr-Coulomb theories of failures. 7M b) In an unconfined compression test, a sample of sandy clay 8cm long and 4cm in diameter

fails under a load of 120N at 10% strain. Compute the shearing resistance taking into account the effect of change in cross-section of the sample.

8M

10. a) What are the advantages and disadvantages of direct shear test over triaxial test? 7M b) The stresses on a failure plane in a drained test on a cohesionless soil are:

Normal stress (σ)=100kN/m2, Shear stress ( )=40kN/m2. Determine the angle of shearing resistance and the angle which the failure plane makes with the major principal plane. Also find the major and minor principal stresses.

8M





WATER RESOURCES ENGINEERING-I (Civil Engineering)



Unit – I

1. a) How is precipitation measured? Discuss the three methods which convert the point precipitation to areal precipitation and comment on each method.

7M

b) What is Hydrologic Cycle? Explain Horton's representation of hydrologic cycle with neat sketch.

8M

2. a) Discuss about the factors affecting evaporation and demerits of evaporation pan. 8M b) Use the rainfall data below to determine the φ index for the watershed if the runoff depth

was 6.6cm.

Time (hr) Rainfall (cm/hr) 0-1 1.1 1-3 1.8 3-5 2.6 5-8 1.3

7M

Unit – II

3. a) What is Unit Hydrograph? Discuss with a neat sketch. And write about use and limitations of UH.

8M

b) Derive the S – Curve Hydrograph for the 4hr Unit Hydrograph given below:

Time (hr) 0 4 8 12 16 20 24 28 Ordinates of 4hr UH 0 10 30 25 18 10 5 0

7M

4. a) What is canal lining? Write about merits, demerits and types of canal lining. 8M b) Design a regime canal for a discharge of 50cumecs and silt factor=1.1. Use Lacey’s theory.

7M

Unit – III

5. a) Derive Dupuit's equation for discharge of an unconfined aquifer. 7M b) Design a tube well for the following data:

Yield required = 0.2cumecs, thickness of confined aquifer=40m, radius of influence=300m, K=80m/day, drawdown=6m.

8M

6. a) What is the necessity of Irrigation? Explain the classification of Irrigation systems. 8M b) What are the methods of improving soil fertility?

7M

Unit – IV

7. a) What are flood routing methods? Explain reservoir routing. 7M b) Determine 100yr and 200yr flood using log Pearson type-III distribution. Given:

Mean=2.7051, sy=0.1327, Cs=0.023. 8M

Cont…2

:: 2 ::

8. a) Define the following: i. Flood frequency ii. Recurrence interval iii. Return period iv. Probability of occurrence

7M

b) For the inflow hydrograph shown below, perform the routing through the reservoir reach assuming K=12hours and X=0.278.

Time (hr)

0 4 8 12 16 20 24 28 32 36 40 44 48 52 56

Inflow (m3/s) 42 68 116 164 194 200 192 170 150 128 106 88 74 62 54

8M

Unit – V

9. a) Define Duty, Delta, and Base period. Derive relationships between them. 9M b) A canal has a discharge of 20cumecs. The left wing canal has a Cultivable Command Area

of 20000 hectare with crop intensity of 80%. The right wing canal has 12cumec discharge lesser than the left wing with CCA of 12000 hectare and crop intensity 50%. Compare the crop efficiencies of the two canal wings.

6M

10. a) What are the various methods of improving duty? 5M b) For the healthy growth of a crop, the field capacity=30%, permanent wilting=11%,

γd=1300kg/m3, RZD=70cm, consumptive use=12cm, OMC ≥ 25%. Determine the watering interval in days.

10M





STRUCTURAL ANALYSIS-II

(Civil Engineering)



Unit – I

1. a) Distinguish between Arch action and Beam action. 3M b) A symmetrical three hinged parabolic arch has a span of 36m. It carries an udl of

20KN/m over the left half of the span. The central rise is 6m. The arch also carries two point loads of 20KN and 40KN at 18m and 26m from left support. Determine the reactions and find the bending moment, Normal thrust and radial shear at a section just to the right of 40KN load.

12M

2. A two hinged parabolic arch is of span 36m with central rise of 6m. Supports are at same level. It carries an udl of 20KN/m over the left half of span. Determine the reactions and the Bending moments at the crown.

15M

Unit – II 3. Analyze the continuous beam as shown in Fig.1 by kani’s method:

Fig.1

15M

4. Analyze the rigid frame as shown in Fig.2 by kani’s method:

Fig.2

15M

Unit – III 5. In the continuous beam shown in Fig.3, the support B sinks by 6mm during loading.

Taking I=70x 106mm4 and E= 200KN/mm2, Analyze the beam by Slope deflection method and find the end moments. Assume EI is constant. Draw the BMD and SFD:

Fig.3

15M

Cont…2

::2::

6. Analyze the portal frame shown in Fig.4 by Moment Distribution method and plot the BMD. The support B settles by 10mm during loading. Take E=2x105N/mm2, I=7.5x10 6mm4. Assume EI is constant:

Fig.4

15M

Unit – IV 7. Analyze the beam shown in Fig.5 by Flexibility method and find the end moments:

Fig.5

15M

8. Analyze the beam shown in Fig.6 by Flexibility method and find the end moments:

Fig.6

15M

Unit – V 9. Analyze the beam shown in Fig.7 by Stiffness matrix method and find the end moments.

EI is constant:

Fig.7

15M

10. Analyze the beam shown in Fig.8 by Stiffness method and find the end moments:

Fig.8

15M




ENGINEERING GEOLOGY (Civil Engineering)



Unit - I 1. a) Explain the importance of geology in the field of civil engineering. 8M b) Define weathering of rocks and explain types of weathering.

7M 2. a) Analyze possible risk while construction of dam across the fault plane. 8M b) With a neat sketch, explain the different zones of interior Earth.

7M

Unit – II 3. a) Explain the physical properties of minerals which depends on light. 7M b) Describe the important physical properties of following minerals:

i. Plagioclase feldspar ii. Hornblende iii. Augite iv. Quartz

8M

4. a) What is mineral? List out any five minerals with composition and its uses. 7M b) Explain the properties of following minerals and its uses:

i. Chromites ii. Bauxite iii. Hematite iv. Galena

8M

Unit – III 5. a) What are the characteristics of igneous rocks? Explain the classification of igneous rocks. 8M b) Explain the important structures of sedimentary rocks.

7M 6. a) What is a fold? Explain the different types of folds with neat sketches. 8M b) Explain the following with neat sketches:

i. Anticline fold and Syncline fold ii. Horst and Graben fault

7M

Unit – IV 7. a) Define unconformity and add a descriptive note on classification of unconformity. 8M b) What are joints? Explain its types and add a note on engineering consideration dealing

with jointed rocks.

7M

8. a) Explain the ground water investigations by electrical resistivity method and mention other applications of electrical resistivity method.

8M

b) Write a note on magnetic methods of geophysical exploration. 7M

Unit – V 9. a) Explain the geological factors to be considered for selection of suitable dam. 8M b) Add a note on tunnelling through fault zones.

7M 10. a) Discuss the suitability of occurrence of following rocks at dam site:

i. Sandstone ii. Lime stone iii. Basalt iv. Granite

8M

b) Explain the geological consideration in lining of tunnels. 7M





ESTIMATING AND COSTING

(Civil Engineering)



Unit – I

1. a) Differentiate between Revised Estimate and Supplementary Estimate. 5M b) Mention the Contingencies and Work Charged Establishment in an Estimate and explain

briefly. 10M

2. a) List the Deductions for openings, RCC work and R.B work in a RCC building. 8M b) Differentiate between Plinth Area Estimate and Abstract Estimate.

7M

Unit – II

3. Explain different methods of building estimate with a illustrative example for each method.

15M

4. Prepare an estimate for one kilometer length of a cement concrete track way 60cm wide tracks 1.5m centre to centre over 15cm rammed crullers. Assume suitable rates and dimension.

15M

Unit – III

5. a) List the labour required for the construction of PCC 1:2:4 in foundation for a building. 5M b) Analyse the rate for 12mm plastering 1:3 cement mortar for a wall building.

10M

6. Calculate the quantity of materials required for the following items of work: i. Half brick wall with 1:3 cement mortar ii. First class brickwork in foundation and plinth with 20x10x10cm bricks with cement

mortar 1:6

15M

Unit – IV

7. a) Explain the security deposit in tender documents. 7M b) Explain the documents to be attached to a contract document in detail.

8M

8. a) Explain the different types of contracts. 7M b) Explain in detail about standard measurement book.

8M

Unit – V

9. a) Define Scrap value, Salvage Value, Market value and Book value in the valuation of buildings.

8M

b) Explain the method of working out the amount of annual instalment of Sinking fund required to be deposited to accumulate the whole amount invested with an example.

7M

10. a) Differentiate between rental method and Capital value method of valuation of a building. 7M b) Define Mortgage lease. Mention the different methods and explain them briefly. 8M

vardhaman college of engineering8. a) write a note on the following machine independent operating...

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