laxmi institute of technology, sarigam · draw isometric and views of an 1b. interpret multi 1.1...

LAXMI INSTITUTE OF TECHNOLOGY, SARIGAM

COURSE FILE

Subject Name : Mechanical Drafting

Subject Code : 3321901

Course Name :Diploma Engineering

Semester : 2nd

DEPARTMENT OF MECHANICAL ENGINEERING

Index

Sr. No.

Particulars

1 Scheme

2 Syllabus

3 Lecture Plan

4 List of Books

5 Drawing Sheets

6 MID Question Papers

7 Gtu Question Paper

Course of Study and Scheme of Examination for Batch starting from January 2019

DE-2nd Semester

(MECHANICAL ENGINEERING)

Teaching Scheme

(In Hours)

Total Credits

(L+T+P)

Examination Scheme

Theory Marks

Practical Marks

Total

L T P C ESE PA ESE PA 200

2 0 6 8 70 30 40 60

Mechanical drafting Course Code: 3321901

GTU/ NITTTR Bhopal/12 -13 Gujarat State

GUJARAT TECHNOLOGICAL UNIVERSITY, AHMEDABAD, GUJARAT

COURSE CURRICULUM

Course Title: Mechanical Drafting (Code: 3321901)

Diploma Programmes in which this course is offered Semester in which offered Mechanical Engineering, Mechatronics Engineering

Second Semester

1. RATIONALE:

The students of mechanical engineering programme are mainly involved in drafting, manufacturing, inspection and planning activities (such as preparing process plans, preparing bill of materials, etc.) at industries. For all such activities, reference document is the drawing of components/assemblies to be manufactured. In this context, it is of utmost priority to prepare, read and interpret these drawings correctly for production of components and assemblies accurately and precisely. The industrial practices of drafting are also important for the students to make them aware of drafting practices, symbols, codes, norms and standards generally used in industries. Development of sketching ability also strengthens effective engineering communication & presentation.

2. COMPETENCIES:

The course content should be taught and implemented with the aim to develop different types of skills so that students are able to acquire following competencies: i. Prepare engineering drawings using codes, norms and standards. ii. Interpret basic engineering drawings for various planning, inspection and

manufacturing activities.

3. TEACHING AND EXAMINATION SCHEME:

Teaching Scheme (In Hours)

Total Credits (L+T+P)

Examination Scheme

Theory Marks Practical Marks Total Marks

L T P C ESE PA ESE PA

200 2 0 6 8 70 30 40

60

Legends: L-Lecture; T – Tutorial/Teacher Guided Student Activity; P - Practical; C – Credit;; ESE - End Semester Examination; PA - Progressive Assessment. Note: It is the responsibility of the institute heads that marks for PA of theory & ESE and PA of practical for each student are entered online into the GTU Portal at the end of each semester within the dates specified by GTU.



4. DETAILED COURSE CONTENTS:

Unit Major Learning Outcomes

Sub-topics

Unit – I Multi views Representation

1a. Draw isometric and multi views of an object.

1b. Interpret multi views drawings.

1.1 First & third angle projection methods and positions of six views.

1.2 Multi view drawings (all six views) from given isometric drawing / physical object.

1.3 Missing view drawings from given adequate orthographic views.

Unit– II

Sectional Ortho graphics

2a. Draw sectional view/s of an object.

2b. Interpret sectional views.

2.1 Need of sections. 2.2 Section lines and cutting plane. 2.3 Rules for sectioning and section lines. 2.4 Types of sections- full, half, revolved,

removed, partial, off-set, aligned. 2.5 Sectional view drawings from given

isometrics drawing / physical object and cutting plane conditions.

Unit– III

Projections and Sections of Solids

3a. Draw sectional views of different solids.

3b. Interpret sectional views of different solids.

3.1 Types and dimensional specifications of solids (prism, pyramid, cylinder, cone).

3.2 Projections of solids - in various positions with respect to the reference planes. (Parallel, perpendicular and inclined to HP and / or VP.)

3.3 Sectional views of different solids in given various positions.

3.4 True shape of section. Unit– IV Intersection and Penetration of Solids and Surfaces

4a. Draw intersectional view/s of an object.

4.1 Importance and field use. 4.2 Intersection curve for Intersection /

penetration of : i. Prism into prism.

ii. Cylinder into cylinder. iii. Cylinder into prism. iv. Cone into cylinder.

Unit– V

Development of Surfaces

5a. Develop the surface requirement of given application.

5.1 Importance of development of surfaces.

5.2 Drawing of development of surfaces of prism, pyramid, cylinder and cone – independent, sectioned and combination.

Unit– VI Drafting Symbols

6a. Use & Interpret drafting symbols.

6.1 Machining symbol and its interpretation.

6.2 Geometrical symbols and its interpretation.

6.3 Other drafting symbols like threading, dowels, pins, ribs, bearings, etc.

6.4 Notes in drawing like heat treatment conditions, surface conditions, assembly notes, etc. (All symbols as per BIS).

Unit– VII Welded Joints, Piping & Duct Layouts

7a. Draw & interpret weld joints, piping layout and duct drawings.

7b. Interpret Process

7.1 Weld symbols as per BIS-813 / ASME (primary symbols & supplementary symbols).

7.2 Weld nomenclature. 7.3 Weld dimensions.



flow diagram & piping isometrics

7.4 Welding drawing interpretations. (like simple heat exchangers, pressure vessels, etc.)

7.5 Pipe-types, standards and designation methods.

7.6 Pipe line symbol as per passing fluid, air, gas, water etc.

7.7 Piping fitting symbols. 7.8 Pipe line diagram. 7.9 Interpretation of Process flow diagram

& piping isometrics & pipe schedule chart.

7.10 Ducts-types and applications. 7.11 Duct layout.

Unit– VIII Details & Assembly

8a. Prepare and interpret detail and assembly drawing.

8b.Workout material requirement from a given drawing.

8.1 Importance and difference of these drwaings.

8.2 Detail drawing from given assembly. 8.3 Assembly drawings from given details. 8.4 Preparing bill of material (part list).

Unit– IX Fasteners

9a.Use appropriate fasteners for given situations.

b. Draw sketches for different types of fasteners.

9.1 Detachable & permanent fasteners. 9.2 Sketches of threads (square, acme,

knuckle, Internal – external threads, Left hand – right hand threads, Single & multi start threads).

9.3 Sketches of studs (cap screws, machine screws, set screws).

9.4 Sketches of bolts & nut (hexagonal, square).

9.5 Sketches of rivets (snap, pan, countersunk, conical).

9.6 Sketches of keys. 5. SUGGESTED SPECIFICATION TABLE WITH HOURS & MARKS (THEORY):

Unit No.

Topic Title

Teaching Hours

Distribution of Theory Marks R

Level U

Level A

Level Total

I. Multiviews representation 3 0 0 07 07 II. Sectional orthographics 3 0 0 07 07

III. Projections and sections of solids 4 0 0 07 07 IV. Intersection & penetration of solids &

surfaces 6 0 5 07 12

V. Development of surfaces 4 0 0 07 07 VI. Drafting symbols 2 5 0 00 05

VII. Welded joints and Piping Layouts 4 2 2 04 08 VIII. Details & assembly 2 2 0 09 11

IX. Fasteners - 4 0 02 06 Total 28 13 7 50 70

Legends: R = Remember; U = Understand; A = Apply and above levels (Bloom’s revised taxonomy)



Notes:

1. This specification table shall be treated as only general guideline for students and teachers. The actual distribution of marks in the question paper may vary from above table.

2. If midsem test is part of continuous evaluation, unit numbers 1, 2, 3 and 5 are to be considered. It is also compulsory for student to complete ex.no.1 to 5 and 7 to eligible for midsem test.

3. Ask the questions from each topic as per marks weightage. Optional questions must be asked from the same topic. That is weightage of compulsory attendance part of questions will be equal to marks allotted to each topic.

5. SUGGESTED LIST OF PRACTICAL/EXERCISES:

The practical/exercises should be properly designed and implemented with an attempt to develop different types of skills leading to the achievement of the above mentioned expected competency. Following is the list of minimum sheets to be drawn.

Sheet No. Unit No. Practical/Exercises Hours

1 I

MULTIVIEWS: a: Given the pictorial view, draw multi views.-Two problems. b: Select one object, measure it and draw multi views. The

selected object has to be approved by Teacher. (Multi views include Elevation, Plan, Rear view, Bottom view, Right

hand side view and Left hand side view.

08

2 I

MISSING VIEWS: Given adequate number of minimum views, draw additional view/s as asked.-Three problems.

04

3 II

SECTIONAL VIEWS: a: Given the pictorial view with cutting plane/s, draw the views as

asked including sectional view/s.-Two problems. b: Select one object, measure it and draw the views as asked

including sectional view/s. The selected object has to be approved by Teacher.

06

4 III

PROJECTIONS OF SOLIDS: Draw the projection of solids- 4 problems.(1-Prism, 1-Pyramid, 1-Cylinder and 1-Cone.). (With varied dimensions. Refer Note d.)

06

5 III

SECTIONS OF SOLIDS: Draw the sections of solids. Also draw true shape of each sections-4 problems.(1-Prism,1-Pyramid,1-Cylinder and 1-Cone.)

08



(With varied dimensions. Refer Note d.)

6 IV

PENETRATION AND INTERSECTION: Draw the intersection curves- 4 problems.( Prism into prism, Cylinder into cylinder, Cylinder into prism, Cone into cylinder. (With varied dimensions. Refer Note d.)

08

7 V

SURFACE DEVELOPMENT: Draw development of surface of prism, pyramid, cylinder and cone – independent, sectioned and combination.-Total 4 problems. (With varied dimensions. Refer Note d.)

04

8 VII

WELD JOINT ASSEMBLY: Draw the weld joint drawing with weld symbols and nomenclature. Take minimum 3 parts for weld joint assembly.

08

9 VII

PIPING LAYOUT: Prepare piping layout for given application/situation with piping symbols and nomenclature. Also prepare isometric piping layout for the same problem.

08

10 VIII

DETAILS: Draw the details of all parts for the assembly selected and sketched as student activity.

12

11 VIII

ASSEMBLY: Draw the assembly of all parts drawn for Sheet No.8. This includes minimum one sectional view and also the parts list.

12

12 All

PROBLEM BASED LEARNING: Complete the given orthographic views with few missing lines of at least three objects. Also sketch (free hand) isometrics of them.

-

13 All

SCHOOL WITHIN SCHOOL: a: Explain at least one problem for construction and method of

drawing in sheet to all batch colleagues. Teacher will assign the problem of particular sheet to be explained to each batch student.

b: Each student will assess at least one sheet of other students (May be 5-6 students- to be assigned by teacher) and will note down the mistakes committed by them. Student will also guide the students for correcting the mistakes, if any.

-

Total 84

Legends: R = Remember; U = Understand; A = Apply and above levels (Bloom’s revised taxonomy)



Note: This specification table shall be treated as only general guideline for students and teachers. The actual distribution of marks in the question paper may vary from above table.

NOTES:

a: Use both sides of sheet. For example, draw sheet number 2 on backside of sheet number 1. b: It is compulsory to perform students’ activities. c: Submission includes sheets, objects, parts/assembly, drawings got for interpretation, student activities

performed and sketch book. (Term work must not include any photocopy/ies, printed manual/pages, litho, etc. It must be hand written/hand drawn by student only.)

d: The dimensions of solids-like base dimension/diameter, height, number of sides (for prism and pyramid) must be varied for each student in batch so that each student will have same problem, but with different dimensions.

e: Ask for 6-8 components assembly only. f: Keep “Westernmann Table” (Revised to Indian Standards, New Age International Publishers) during

theory and practice periods. g: For 40 marks under Practical Marks ESE, students are to be assessed for competencies achieved. Students

are to be given data for practical ESE to: i. Prepare drawings. ii. Interpret given drawing/s. iii. Refer and interpret data from data book/codes/standards/ Westernmann Table.

7. SUGGESTED LIST OF PROPOSED STUDENT ACTIVITIES: Following is the list of student activities.

S. No. Activity No.

Details of student activity

1 1 Solve all problems for sheet number 1 to 7 in sketch book (with dimensions).

2 2

Select two objects. Student will measure and sketch* the same in sketchbook for the reference to draw in sheet. One for MULTIVIEW (Sheet No.1) and another for SECTIONAL VIEWS (Sheet No.3). (*Only freehand isometric sketch with dimensions).

3 3

Select one assembly having minimum 6-8 mechanical related components. Student will measure and sketch the same in sketchbook for the reference to draw details and assembly sheets. This may be in group of 3-4 students. (*Only freehand isometric sketch with dimensions).

4 4 Draw freehand sketches for sheet number 8 to 11 in sketch book.

5 5

Draw various drafting symbols in sketch book. This includes mainly: a: Threading symbols. b: Machining symbols. c: Geometrical symbols d: Welding symbols. e: Piping symbols.

6 6

Get+ minimum one industrial drawing each for following , which are in use by industry:

a: Machined component. b: Machined part assembly-6-8 components. c: Welded joint based component /assembly.



d: Piping layout. Interpret above all drawings and write your conclusions in sketchbook.

+ Get by Industrial visits, internet search, reference book, etc.

7 7 Freehand sketches ( in sketch book) of various fasteners assigned by teacher.

8 8

List at least two questions each for following cases. List those questions you would like to ask to know / improve further.

a: More than six views. b: Combination of different solids. c: Impact of ability of manual drafting on computer aided drafting. d: Intersection and duct layout. e: Correlation between details drawings and assembly drawings.

8. SUGGESTED LEARNING RESOURCES:

A. List of Books.

S.No. Title of Books Author Publication

1 Engineering Drawing. N.D.Bhatt. Charotar Publishing House, Anand. 2 Engineering Drawing. K.R.Gopalakrishna. Subhash Publications, Banglore. 3 Engineering Drawing. P.J.Shah. S.Chand, New Delhi. 4 Engineering Graphics. M.B.Shah, B.C.Rana. Pearsons. 5 Machine Drawing. P. Sidheswar, P.

Kannaiah & VVS Sastry.

Tata-McGraw Hill Publishing Co.Ltd.-New Delhi

6 Fundamentals of Engineering drawing.

Warren J. Luzadder Prentice-hall of India Pvt. Ltd.-New Delhi

7 Westernmann Table, Revised to Indian Standards

Jutz, Scharkus. New Age International Publishers

B. List of Major Equipment/ Instrument.

1. Models and cut sections.

2. Various machined parts assemblies.

3. Various weld joints.

4. Set of various industrial updated drawings being used by industries-.

5. Large size drawing equipments and instruments for class room teaching-.

6. Half imperial size drawing board.

7. T-square or drafter (Drafting Machine).

8. Set squires (450 and 300-600).

9. Protector.

10. Drawing instrument box (containing compasses and divider).

11. Drawing sheets.



12. Drawing pencils.

13. Eraser.

14. Drawing pins / clips.

C. List of Software/Learning Websites. 1. http://mvredp.blogspot.in/2010/04/sections-of-solids-introduction.html 2. http://www.youtube.com/watch?v=P5g5omLoDr8 3. http://engggraphics.wordpress.com/2012/04/10/an-advance-tamil-new-year-gift/ 4. http://rgpv-ed.blogspot.in/2009/09/development-of-surfaces.html 5. https://sites.google.com/site/middleschooljghs/graphic-communication/geometric-drawing-

and-surface-developments 6. http://www.techdrawingtools.com/12/l1201.htm 7. http://www.wermac.org/documents/isometric.html 8. http://www.me.metu.edu.tr/courses/me114/Lectures/assembly.htm 9. http://metal.brightcookie.com/2_draw/draw_t1/htm/draw1_2_1.htm 10. http://www.ductedreversecycleairconditioning.com.au/category/37165122 11. http://www.affordablecomfort.org/images/Events/15/Courses/422/Proctor_TAM07.pdf 12. http://en.wikipedia.org/wiki/Engineering_drawing 13. http://www.sevenhills-

h.schools.nsw.edu.au/Graphics_TG201/Orthographic/Drawortho.htm 14. www.design-technology.info 15. www.studyvilla.com 16. www.authorstream.com 17. Computer based learning material published by KOROS.

9. COURSE CURRICULUM DEVELOPMENT COMMITTEE

Faculty Members from Polytechnics 1. Prof. M. K. Dudharejiya, Lecturer in Mechanical Engineering, Sir B.P.I.,

Bhavnagar. 2. Shri A.M.Talsaniya, Lecturer in Mechanical Engineering, Sir B.P.I., Bhavnagar.

3. Shri P.L.Bhogayata, Lecturer in Mechanical Engineering, Sir B.P.I., Bhavnagar.

Co-ordinator and Faculty Member from NITTTR Bhopal 1. Prof. Sharad Pradhan, Associate Professor, Dept. of Mechanical Engineering,

LECTURE PLAN

SR. NO. TOPIC TO BE COVERED TEACHING

HOURS 1. First & third angle projection methods and positions of six views. 1

2. Multi view drawings (all six views) from given isometric drawing / physical object. 1

3. Missing view drawings from given adequate orthographic views. 1

4. Need of sections. 1

5. Section lines and cutting plane. 1

6. Rules for sectioning and section lines 1

7. Rules for sectioning and section lines. 1

8. Types of sections- full, half, revolved, removed, partial, off-set, aligned. 1

9. Sectional view drawings from given isometrics drawing / physical object and cutting plane conditions. 1

10. Types and dimensional specifications of solids (prism, pyramid, cylinder, cone). 1

11. Projections of solids - in various positions with respect to the reference planes. (Parallel, perpendicular and inclined to HP and / or VP.)

1

12. Sectional views of different solids in given various positions. 1

13. True shape of section. 1

14. . Importance and field use. 1

15.

Intersection curve for Intersection / penetration of : i. Prism into prism. ii. Cylinder into cylinder. iii. Cylinder into prism. iv. Cone into cylinder.

1

16. Importance of development of surfaces. 1

17. Drawing of development of surfaces of prism, pyramid, cylinder and cone independent, sectioned and combination. 1

18. Machining symbol and its interpretation. 1

19. Geometrical symbols and its interpretation. 1

20. Other drafting symbols like threading, dowels, pins, ribs, bearings, etc. 1

21. Notes in drawing like heat treatment conditions, surface conditions, assembly notes, etc. (All symbols as per BIS). 1

22. Designation and coding methods according to BIS 1

23. Designation and coding (as per BIS, ASME, EN, DIN,JIS)of mostly used non ferrous materials 1

24. Weld symbols as per BIS-813 / ASME (primary symbols & supplementary symbols). 1

25. Weld nomenclature. 1

26. Weld dimensions. 1

27. Welding drawing interpretations.(like simple heat exchangers, pressure vessels, etc.) 1

28. Pipe-types, standards and designation methods. 1

29. Pipe line symbol as per passing fluid, air, gas, water etc. 1

30. Piping fitting symbols. 1

31. Pipe line diagram, Interpretation of Process flow diagram & piping isometrics & pipe schedule chart.

1

32. Ducts-types and applications. Duct layout. 1

33. Importance and difference of these drawings. 1

34. Detail drawing from given assembly. 1

35. Assembly drawings from given details. 1

36. Preparing bill of material (part list). 1

37. Detachable & permanent fasteners. 1

38. Sketches of threads (square, acme, knuckle, Internal – external threads, Left hand – right hand threads, Single & multi start threads).

1

39. Sketches of studs (cap screws, machine screws, set screws). 1

40. Sketches of bolts & nut (hexagonal, square). 1

41. Sketches of rivets (snap, pan, countersunk, conical). 1

42. Sketches of keys 1

REFERENCE BOOK

Sr. No. Author Title of Books Publication

1 N.D.Bhatt. Engineering Drawing. Charotar Publishing House, Anand.

2 P.J.Shah. Engineering Drawing. S.Chand, New Delhi.

3 M.B.Shah, B.C.Rana. Engineering Graphics. Pearsons.

4 P. Sidheswar, P.

Kannaiah & VVS Sastry.

Machine Drawing. Tata-McGraw Hill Publishing Co.Ltd.-New Delhi

5 N.D.Bhatt. Engineering Drawing. Charotar Publishing House, Anand.

TUTORIALS/ ASSIGNMENTS

Sr. No.

Unit No. Tutorial/Exercises

Approx. Hrs.

Required

1 I Exercise on theory of machine 02

2 II Exercise on balancing of rotating mass. 04

3 II Exercise on balancing of reciprocating mass. 04

4 III Exercise on vibration and ergonomics 04

5 IV Exercise on steering mechanism. 04

6 VI Exercise on suspension system and tyre 04

7 V Exercise on vehicle performance. 06

Total 28

Date: 21/1/2019

Laboratory Manual Subject : MECHANICAL DRAFTING (3321901)

Index

No

Title of content Page No

01 Course Details i. Subject Code ii. Title of the laboratory iii. Teaching scheme iv. Examination Scheme

3

02 Introduction to the Laboratory 3

03 General Instructions on how to use equipment or facilities and

how to avoid misuse, safety measures, laboratory code, dress

code, standard accessories to be possessed by the student 4

04 List of equipment with specifications from manuals 4

List of Experiments(SHEETS) 1 Multi view Representations 5

2 Sectional Orthographic 6 3 Missing Views 7 4 Projection of Solids 9 5 Section of Solids 10 6 Penetration And Intersection of solids 12 7 Development of surface 13 8 Weld joint Assembly 15 9 Piping Layout 15 10 Detail Drawing 16 11 Assembly Drawing 17

SHEET NO.1

MULTIVIEW REPRESENTATIONS

1

Draw the orthographic view of the object given below (front view, side views, top view, bottom view, rear view) use 3rd angle projection method.

2

Draw the orthographic views of below object. (use 1st angle method of projection )

SHEET NO.2

SECTIONAL ORTHOGRAPHICS

1

Draw the orthographic view of below object (sectional F.V., L.H.S.V. and T.V.) use 1st angle projection method.

2

Draw the orthographic view of below object (sectional F.V. along A-A, T.V. and side view) Use 3rd angle method of projection.

SHEET NO.3

MISSING VIEWS

1

Using same method of projection draw following views referring the views given in figure below.(1) L.H.S.V.

2

Using same method of projection draw following views referring the views given in figure below.(1) L.H.S.V.

SHEET NO.4

PROJECTION OF SOLIDS

1. A pentagonal pyramid, base 25 mm sides and axis60 mm long is resting on a corner of its base in such a way that the edge containing that corner makes an angle of 60° with H.P. and the plan of the axis makes an angle of 45° with V.P. draw the projections.

2. A cylinder base 40 mm diameter and 60 mm long has its axis parallel to and 30 mm above H.P. and inclined at 45° to V.P. Draw the projections of the cylinder.

3. A cone base 60 mm diameter and axis 90 mm long is resting on the H.P. on a point of its base circle. Its axis is inclined at 30 to V.P. and 60 to H.P. Draw the projections.

4. A regular hexagonal prism having 25 mm base sides and 65 mm long is standing on the H.P. on one of its base side on which it rests makes an angle of 30° with V.P. The rectangular face containing that side makes an angle of 45 with V.P .Draw its projections.

5. A tetrahedron of 70 mm base side is standing on its one of the base side on the H.P. such that the face passing through that side is normal to H.P. and parallels to V.P. Draw its projections.

SHEET NO.5

SECTION OF SOLIDS

1. A SOLID IS CUT AS SHOWN IN THE FIG. DRAW ITS SECTIONAL VIEW AND TRUE SHAPE OF THE SECTION.

2. A pentagonal pyramid, base 30 mm sides and height 65 mm long is standing on H.P. such that one of its base sides is parallel to V.P.A section plane making an angle of 60° to H.P. and passing through the midpoint of axis of the pyramid is cutting this pyramid. Draw the sectional top view and true shape of the section.

3. A square pyramid having 40 mm base side and 60 mm height is standing on its base on H.P. such that its base sides make an equal angles with V.P.A section plane inclined at 45° to H.P. and perpendicular to V.P. is cutting this pyramid by passing through the midpoint of the axis of this pyramid. Draw front view, sectional top view and true shape of the section.

4. A cylinder of 50 mm base diameter and 80 mm long axis is standing on the H.P. on its base. A section plane which is perpendicular to V.P. and inclined at45 to H.P. is bisecting the axis of the cylinder. Draw its front view, sectional top view and true shape of the section.

5. A cone having base diameter 60 mm and axis 80 mm long is standing on its circular base on H.P. A section plane making an angle of 45° with H.P. and passing through the midpoint of axis cutting this cone. Draw its front view, sectional top view and true shape of the section.

SHEET NO.06

INTERSECTION AND PENETRATION OF SOLID

1. A square prism having 40 mm base sides and 80 mm height is standing on its base on the HP in such a way that one of its vertical face makes an angle of 30◦ with VP. A horizontal prism of 30mm base sides and 80mm height is penetrating the vertical prism so that the axis of it is bisecting the axis of the vertical prism. Draw their projection showing lines of intersection.

2. A cone having 75 mm diameter and axis 110 mm long is standing on HP on its base. A cylinder of 40 mm diameter is penetrating the cone. The axis of the cylinder is parallel to Hp and VP and passing through a point 27 mm above the base and on the axis of the cone. Draw their projections showing the curves of intersection.

3. A horizontal cylinder of 40 mm diameter is penetrating a vertical cylinder of 60 mm diameter. The axis of the horizontal cylinder is 40 mm above the base of vertical cylinder and 10 mm in front of its axis. Draw their projections.

4. A vertical cylinder of 50mm base diameter is penetrated by a square prism having 25mm base sides such that the axis of the two solids bisects one another. Faces of the prism are equally inclined to HP and VP. Draw the projections and show intersection lines in it.

SHEET NO.07

DEVELOPMENT OF SURFACE

1. Draw the Development of lateral surface ‘P’ of the hexagonal prism shown

in Figure-1

2. Draw the Development of lateral surface ‘A’ of the cylinder shown in Figure-2

3. Draw the Development of cone cut as shown in Fig No. 3

Fig. 3

SHEET NO.08

WELD JOINT ASSEMBLY & PIPING SYMBOLS

1. Draw the Elementary welding symbols and Illustration. 2. Draw the Supplementary welding symbols and Illustration. 3. Draw the piping Symbols. 4. Draw the piping layout with the use of piping symbols. 5. Draw the isometric piping layout for above problem.

SHEET NO.09

ASSEMBLY AND DETAILS & DETAIL DRAWING

Ex.1 Draw the Detail assembly drawing of knuckle joint.

SHEET NO.10

FASTENERS

1. Draw the sketches of different Rivets. 2. Draw the sketches of Screw thread. 3. Draw the sketches of different types of riveted joints.

1/5

Seat No.: ________ Enrolment No.______________

GUJARAT TECHNOLOGICAL UNIVERSITY DIPLOMA ENGINEERING – SEMESTER – I • EXAMINATION – WINTER - 2018

Subject Code:3321901 Date:09-01-2019

Subject Name: Mechanical Drafting

Time:10:30 AM to 01:30 PM Total Marks: 70 Instructions:

1. Attempt all questions.

2. Make Suitable assumptions wherever necessary.

3. Figures to the right indicate full marks.

4. Use of programmable & Communication aids are strictly prohibited.

5. Use of only simple calculator is permitted in Mathematics.

6. English version is authentic.

Q.1 Answer any seven out of ten. દશમ ાંથી કોઇપણ સ તન જવ બ આપો. 14

1. Draw the symbols: (a) Straightness (b) Parallelism

૧. સાંજ્ઞ દોરો: (અ) સીધ પણાં (બ) સમ ાંતરત

2. Draw the symbols of Tension Spring and Leaf Spring

૨. ટેન્સન સ્પ્રાંગ અને લીફ સ્પ્રાંગ ની સાંજ્ઞ દોરો.

3. Draw the symbol of single J But weld and Spot Weld.

૩. સ્પસાંગલ જે બટ વેલ્ડ અને ્પોટ વેલ્ડ ની સાંજ્ઞ દોરો

4. Draw the symbol of First angle and Third angle Projection Method.

૪. રથમ કોણીય અને તૃતીય કોણીય રક્ષેપણ પધ્ધતી ની સાંજ્ઞ દોરો.

5. Draw the symbol of gate Valve and globe Valve.

૫. ગેટ વ લ્વ અને ગ્લોબ વ લ્વ ની સાંજ્ઞ દોરો.

6. Draw free hand sketch of Knuckle and Square Thread Form.

૬. નકલ અને ચોરસ આાંટ ન ્વરૂપ ન ાં મ ક્ત હ્ત ચચત્ર દોરો.

7. Draw free hand sketch of Cotter Foundation Bolt

૭. કોટર ફ ઉન્ડેશન બોલ્ટ ન ાં મ ક્ત હ્ત ચચત્ર દોરો

8. Draw sketch of single riveted single cover butt joint.

૮. સ્પસાંગલ રીવેટેડ સ્પસાંગલ કવર બટ સ ાંધ ન ાં ચચત્ર દોરો.

9. Enlist types of sections and explain any one in detail

૯. જ દ જ દ રક ર ન ાં સેક્સનની ય દી બન વો અને કોઈ પણ એક ચવ્ત ર થી

સમજાવો.

10. What is auxiliary view? Explain briefly.

૧૦. ઓક્ષીલરી દેખ વ એટેલ ેશ ાં? ટ ાંક મ સમજાવો.

Q.2 (a) A cylinder of 60 mm base diameter and 80 mm height is resting on its base on

H.P. It is cut by a section plane inclined at 30° to H.P and perpendicular to V.

P. at a distance 30 mm from top passing through the axis. Draw elevation,

sectional top view and true shape of section.

07

રશ્ન. ર (અ) એક 60 mm પ ય નો વ્ય સ અને 80 mm ઉંચ ઇ વળો નળ ક ર તેન પ ય પર આડી સપ ટી પર

ઉભો છે. તેને આડી સપ ટી સ થે ૩૦°નો ખ ણો બન વતી તથ ઉભી સપ ટી સ થે લાંબ એવી એક

છેદક સપ ટી મથ ળ થી 30 mm નીચે ધરી પર ક પ ેછે. તેનો સ મેનો દેખ વ, ઉપર નો છેદવ ળો

દેખ વ તથ છેદ નો ખરો આક ર દોરો.

૦૭

OR

2/5

(a) A pentagonal pyramid of 30 mm side of base and 70 mm long is laying on

H.P. on one of its triangular faces such that its axis remain parallel to V.P.

Horizontal cutting plane is cutting this pyramid, bisecting its axis. Draw

Sectional plan and true shape of the section.

07

(અ) એક 30 mm પ ય ની બ જ અને 70 mm ઉંચ ઇ વ ળો પાંચકોણીય પીર મીડ તેન ત્રીકોણ ક ર

પ સ પર આડી સપ ટી પર એ રીતે પડેલો છે કે જેથી તેની ધરી ઉભી સપ ટી ને સમ ાંતર રહે. એક

આડી છેદક સપ ટી તેની ધરી ને દ ભ ગતી ક પ ેછે. તેનો સેક્સન પ્લ ન અને છેદ નો ખરો આક ર

દોરો.

૦૭

(b) Draw the development of the lateral surface of the part P of a square prism

resting on its base on H.P. Length of the side of the base is 25 mm and all

faces are equally inclined to V.P. as shown in figure 1.

07

(બ) તેન પ ય પર આડી સપ ટી પર ઉભેલ એક ચોરસ રીઝમ ન P ભ ગ ની સપ ટી નો ચવ્ત ર દોરો.

આકૃચત 1 મ દશ ાવ્ય મ જબ પ ય ની બ જ ન મ પ 25 mm છે અને રીઝમ ન તમ મ પ સ ઉભી

સપ ટી સ થે સરખો ખ ણો બન વ ેછે.

૦૭

OR

(b) Draw the development of the lateral surface of the part P of a cone as shown

in figure 2.

07

(બ) આકૃચત 2 મ દશ ાવ્ય મ જબ ન શાંક ન P ભ ગ ની સપ ટી નો ચવ્ત ર દોરો. ૦૭

Q.3 (a) A Square prism of side of base 40 mm and height 80 mm is resting on its base

on H.P. It is penetrated by another square prism of side of base 25 mm and

height 60 mm such that axis of both bisects each other at 90°. Rectangular

faces of both the prism make equal angle with V.P. Axis of both prism are

parallel to V.P. Draw projections of both prisms and show line of

intersection.

07

રશ્ન. 3 (અ) એક 40 mm પ ય ની બ જ ન મ પ અને 80 mm ઉંચ ઇ નો ચોરસ રીઝમ આડી સપ ટી પર

ઉભો છે. તે એક બીજા ચોરસ રીઝમ કે જેન પ ય ની બ જ ન મ પ 25 mm અને ઉંચ ઇ 60 mm

હોય તેન વડ ેએવી રીતે ભેદ ય છે કે તેમની ધરીઓ એક બીજાન ેક ટખ ણે દ ભ ગે. બન્ને રીઝમ ન

લાંબચોરસ પ સ ઓ ઉભી સપ ટી સ થે સરખ ખ ણ બન વ ે છે. બન્ને રીઝમ ની ધરીઓ ઉભી

સપ ટી ને સમ ાંતર છે. બન્ને રીઝમ ન રક્ષેપ દોરો અને રતીછેદની રેખ દશ ાવો

૦૭

OR

(a) A cone of base diameter 80 mm and 90 mm height is resting on H.P. and is

penetrated by a square prism of side of base 32 mm. Axis of prism is parallel

to that of the cone and is 12 mm away from cone. Draw the projection with

line of intersection when axis of prism is nearer to V.P.

07

(અ) એક 80 mm પ ય નો વ્ય સ અને 90 mm ઉંચ ઇ નો નળ ક ર આડી સપ ટી પર ઉભો છે અને 32

mm ની બ જ ન પ ય વ ળ ચોરસ રીઝમ વડ ેછેદ ય છે. રીઝમ ની ધરી શાંક ની ધરી ને સમ ાંતર છે

અને તેન થી 12 mm દ ર છે. જ્ય રે રીઝમ ની ધરી ઉભી સપ ટી ની નજીક હોય ત્ય રે ઘન ક ર ન

રક્ષેપ આાંતરછેદ રેખ સ થે દોરો.

૦૭

(b) A cylinder of base diameter 50 mm and height 120 mm is resting on its base

on H.P. It is penetrated by another cylinder of base diameter 30 mm and

height 80 mm such that axis of both bisects each other at 90°. Axes of both

cylinders are parallel to V.P. Draw the projections of both cylinders and show

intersection curve.

07

(બ) એક 50 mm પ ય નો વ્ય સ અને 120 mm ઉંચ ઇ નો નળ ક ર આડી સપ ટી પર ઉભો છે. તે એક

બીજા નળ ક ર કે જેન પ ય નો વ્ય સ 30 mm અને ઉંચ ઇ 80 mm હોય તેન વડ ેએવી રીતે

ભેદ ય છે કે તેમની ધરીઓ એક બીજાન ેક ટખ ણે દ ભ ગે. બન્ને નળ ક ર ની ધરીઓ ઉભી સપ ટી ને

સમ ાંતર છે. બન્ને નળ ક ર ન રક્ષેપ દોરો અને આાંતરછેદ નો વક્ર દશ ાવો.

૦૭

OR

(b) A cone of 70 mm base diameter and 90 mm height is resting on its base on 07

3/5

H.P. It is completely penetrated by a vertical cylinder of base diameter 40

mm. Axis of cylinder is parallel to that of cone and is 8 mm away. Draw the

projections with line of intersection when a plain containing axes is parallel to

V.P.

(બ) એક 70 mm પ ય નો વ્ય સ અને 90 mm ઉંચ ઇ નો શાંક આડી સપ ટી પર ઉભો છે. તે એક 40

mm પ ય નો વ્ય સ ધર વત ઉભ નળ ક ર વડ ેસાંપ ણાપણે ભેદ ય છે. નળ ક ર ની ધરી શાંક ની ધરી

ને સમ ાંતર અને તેન થી 8 mm દ ર છે. જ્ય રે ધરીઓન ેસમ વતી સમતલ સપ ટી ઉભી સપ ટી ને

સમ ાંતર હોય ત્ય રે આાંતરછેદની રેખ સ થે રક્ષેપ દોરો.

૦૭

Q.4 (a) Draw following views of pictorial view of object given in figure 3 using first

angle projection method.

(i) Front view (ii) Bottom View

07

રશ્ન. ૪ (અ) રથમ કોણીય રક્ષેપણ પધ્ધતી થી આકૃચત ૩ મ દશ ાવેલ ચીત્ર ત્મક દેખ વ ન નીચે જણ વેલ રક્ષેપ

દોરો.

(i) સ મેનો દેખ વ (ii) નીચેનો દેખ વ

૦૭

OR

(a) Draw following views of pictorial view of object given in figure 4 using first


(i) Front view (ii) Bottom View

07

(અ) રથમ કોણીય રક્ષેપણ પધ્ધતી થી આકૃચત 4 મ દશ ાવેલ ચીત્ર ત્મક દેખ વ ન નીચ ેજણ વેલ રક્ષેપ

દોરો.

(i) સ મેનો દેખ વ (ii) નીચેનો દેખ વ

૦૭

(b) Draw following views of pictorial view of object given in figure 5 using first


(i) Sectional Front view (ii) Top View

07

(બ) રથમ કોણીય રક્ષેપણ પધ્ધતી થી આકૃચત 5 મ દશ ાવેલ ચચત્ર ત્મક દેખ વ ન નીચ ેજણ વેલ રક્ષેપ

દોરો.

(i) છેદ ત્મક સ મેનો દેખ વ (ii) ઉપર નો દેખ વ

૦૭

OR

(b) Draw following views of pictorial view of object given in figure 6 using first


(ii) Sectional Front view (ii) Top View

07

(બ) રથમ કોણીય રક્ષેપણ પધ્ધતી થી આકૃચત 6 મ દશ ાવેલ ચચત્ર ત્મક દેખ વ ન નીચ ેજણ વેલ રક્ષેપ

દોરો.

(ii) છેદ ત્મક સ મેનો દેખ વ (ii) ઉપર નો દેખ વ

૦૭

Q.5 (a) An Assembly drawing of a cotter joint is given in figure 7. Draw detailed

drawing of each part of the joint using first angle projection method. Also

prepare part list.

10

રશ્ન. ૫ (અ) આકૃચત 7 મ કોટર જોઇંટ ન એસેમ્બલી ડ્રોઇંગ દશ ાવેલ છે. રથમ કોણીય રક્ષેપણ પધ્ધતી થી દરેક

ભ ગ ન ડીટેઇલ ડ્રોઇંગ દોરો. પ ટા લી્ટ પણ બન વો.

૧૦

(b) Draw a surface roughness symbol for the following data.

Roughness Value = 16 Micron

Sampling length =25 mm

Machining allowance = 1.5 mm

Method: grinding

Direction of lay = Parallel

04

(બ) આપેલ વીગતો પરથી સરફેસ રફનેસ સાંજ્ઞ દોરો.

રફનેસ વેલ્ય = 16 Micron

સેમ્પલીંગ લાંબ ઇ = 25 mm

૦૪

4/5

મશીનીંગ એલ ઉંસ = 1.5 mm

મેથડ = ગ્ર ઇંડીંગ

ડ યરેક્સન ઓફ લે = સમ ાંતર

Figure 1: Q.2 (b) Figure 2: Q.2 (b) “OR”

Figure 3: Q. 4 (A) Figure 4: Q. 4 (A) “OR”

5/5

Figure 5: Q. 4 (B) Figure 6: Q. 4 (B) “OR”

Figure 7: Q.5 (A) ************

1/6


GUJARAT TECHNOLOGICAL UNIVERSITY DIPLOMA ENGINEERING – SEMESTER – I/II • EXAMINATION – SUMMER- 2017

Subject Code: 3321901 Date: 17-06-2017


Time: 10:30 AM to 01:30 PM Total Marks: 70

Instructions:







Q.1 Answer any seven out of ten. દશમ ાંથી કોઇપણ સ તન જવ બ આપો. 14

1. Sketch Right hand thread & Left hand thread

૧. ર ઇટ હને્ડ અને લફે્ટ હને્ડ આટ ાં દોરો.

2. Draw neat sketch of symbol of first angle projection method and third angle

projection method.

૨. પ્રથમ કોણિય અન ેણિ-કોણિય પ્રક્ષેપિ પધ્ધણિ ના સીમ્બોલની સ્વચ્છ આકૃણિ દોરો.

3. What is auxiliary view?

૩. ઓક્ઝીલરી વ્ય ુશુાં છે ?

4. Draw symbols of vacuum & oil.

૪. વેકુ્યમ અન ેઓઇલ માટે ન સીમ્બોલ દોરો.

5. Sketch Woodruff key & Gib headed key

૫. વડુ રફ કી અને ગીબ હડેેડ કી દોરો.

6. Draw sketch of countersunk head rivet and pan head rivet.

૬. કાઉન્ટર શંક હેડ ણરવેટ પાન હેડ ણરવેટની આકૃણિ દોરો.

7. Draw symbols of Plug Weld & Seam Weld.

૭. પ્લગ વેલ્ડ અન ેસીમ વેલ્ડ નો સસમ્બોલ દોરો.

8. Draw symbols of reducer & safety valve for flanged pipe fittings.

૮. ફ્લને્ઝડ પાઇપ ફીટીગં ના રીડ્યુસર અન ેસેફ્ટી વાલ્વના સીમ્બોલ દોરો.

9. Draw sketch of sellers & B.A. Thread.

૯. સેલસસ અન ેબી.એ. થે્રડ દોરો.

10. Draw neat sketch of union & Coupling.

૧૦. યનુીયન અને કપલીંગની સ્વચ્છ આકૃસત દોરો.

Q.2 (a) A hexagonal prism, base 25mm side and height 50mm long, is resting on its base on the

H.P. with two edges parallel to the V.P. It is cut by a section plane perpendicular to the

V.P., inclined at 45° to the H.P. and intersecting the axis at a point 40mm above the base.

Draw elevation, sectional plan & true shape of section.

07

પ્રશ્ન. ર (અ) 25 mm બ જુ અન ે50 mm ઉંચ ઈ નો એક ષટકોણીય સિઝમ H.P. પર તેન પ ય પર એવી રીતે ઊભો છે કે જેથી તેની બ ેબ જુ V.P. ને સમ ાંતર થ ય. સેક્શન પ્લેન V.P. ને લાંબ અન ે

૦૭

2/6

H.P. સ થે 45°નો ખણૂો બન વ ેછે અને બઝે થી 40 mm ઉપર ન બબિંદુમ ાંથી પસ ર થઈને સિઝમ ને ક પે છે. આ કપ યેલ સિઝમ નો એબલવેશન, સેક્શનલ પ્લ ન અન ેસ ચો દેખ વ દોરો.

OR

(a) A cone, diameter of base 60 mm and height 90 mm, is resting on HP on the

point on periphery of the base. Axis of the cone makes 60° with the HP and 30°

with the VP. Draw the projections of the cone when the apex is nearer to VP.

07

(અ) 60 mm વ્યાસ અન ે90 mm ઉંચાઇ વાળો શંકુ િેના પાયાના વિુળુ ના એક ણબંદુપર HP માં ઉભો છે. િેની ધરી HP સાથે 60° અને VP સાથે 30° નો ખૂિો બનાવે છે. શંકુનું ણશરોણબંદુ VP ની બાજુ હોય િે રીિે શંકુના પ્રક્ષપેો દોરો.

૦૭

(b) A square prism, side of base 40 mm and height 60 mm rests on its base on the ground with

one of its base sides perpendicular to V.P. A section plane perpendicular to VP and

inclined at 45° to H.P. and passing through a point 15mm from the top end of the axis.

Draw the complete development of the prism between section plane and bottom of prism.

07

(બ) એક ચોરસ સિઝમ પ ય ની બ જુ 40 mm અને ઉંચ ઇ 60 mm છે. તે તેનો પ યો H.P. પર રહ ેઅને એન પ ય ની એક બ જુ V.P ને લાંબ રહ ેતે રીતે ઉભો છે. એક છેદ ત્મક સપ ટી H.P. સ થે 45° નો ખણૂો બન વતી અન ેV.P ને ક ટખણૂ,ે એવી રીતે છેદે છે કે તે ધરી ન ઉપર છેડ થી 15mm દુર એક બબિંદુમ ાંથી પસ ર થ ય છે. કપ યલે સિઝમન નીચેન સાંપણુસ ભ ગનો સવસ્ત ર

દોરો.

૦૭

OR

(b) Draw the plan and elevation of a cone resting on H.P. on its base. Show on them, the

shortest path followed by a fly moving round the cone and returning to the same starting

point. Fly starts from a point on the periphery of base. Take base diameter of cone 80 mm

and height of axis 90 mm.

07

(બ) H.P. ઉપર પડેલા શંકુનો પ્લાન અન ેએલીવેશન દોરો. એક માખી શંકુના બઝે ના એક ણબંદુથી શરુ કરી શંકુને એક આંટો ફરી િે જ ણબંદુ પર પાછી ફર ેછે. માખી વડે કપાયલેો ટંુકામા ટંુકો રસ્િો બિાવો. બઝેનો વ્યાસ 80 mm અને અક્ષની ઉંચાઇ 90 mm લો.

૦૭

Q.3 (a) A square prism edge of base 30 mm base and height 60 mm resting on its base in H.P. It

is completely penetrated by another square prism, edge of base 20 mm and 70 mm long

such that axis of both the prism bisects each other at right angle. Faces of both prisms are

equally inclined with V.P. Draw projections of solids showing the line of intersection.

07

પ્રશ્ન. 3 (અ) એક 30 mm પાયાની બાજુ અને 60 mm ધરીની લાંબાઇ વાળો ચોરસ ણપ્રઝમ H.P. માં િેના પાયા

પર ઉભો છે. િે એક 20 mm પાયાની બાજુ અને 70 mm ધરીની લાબંાઇ વાળા ચોરસ ણપ્રઝમથી

એવી રીિે છેદ છે કે બન્નેની ધરી ના બે સરખા ભાગ થાય. બન્ને ણપ્રઝમની ઉભી સપાટીઓ V.P.

સાથે એક સરખા ખૂિા બનાવે છે. આ સોલીડના પ્રક્ષપેિો દોરો અને ઇન્ટરસેક્શન લાઇન

બિાવો.

૦૭

OR

(a) A cylinder of base diameter 60 mm and 90 mm long, resting on its base on HP. It is

penetrated by another cylinder of diameter 45 mm and 90 mm long such that their axis

bisects each other at right angles and parallel to V.P. Draw their projections showing the

line of intersection.

07

(અ) એક 60 mm પાયાનો વ્યાસ અને 90 mm ધરીની લાબંાઇ વાળો નળાકાર H.P. માં િેના પાયા

પર ઉભો છે. િે એક 45 mm પાયાના વ્યાસ અને 90 mm ધરીની લાબંાઇ વાળા નળાકાર વડે

એવી રીિે છેદ છે કે બન્નેની ધરી એકબીજાને V.P. ને સમાંિર કાટખુિે અને બે સરખા ભાગ કર ે

છે. આ સોલીડના પ્રક્ષપેિો દોરો અને ઇન્ટરસકે્શન લાઇન બિાવો.

૦૭

(b) A circular pipe of 54 mm diameter and 100 mm long has a similar branch of 40 mm

diameter. The axis of the main pipe is vertical and is intersected by the axis of the branch

at an angle of 45° to the H.P. and 20 mm above base. Both the pipes are parallel to the

V.P. Draw its projections showing curves of intersection.

07

3/6

(બ) 54 mm વ્યાસ અને 100 mm લબંાઇ ધરાવિી પાઇપ, 40 mm વ્યાસની એક સમાન શાખા ધરાવ ે

છે. મુખ્ય પાઇપની ધરી ઊભી છે, જ્યાર ેબ્ાંચ પાઈપની ધરી મુખ્ય પાઈપની ધરી ને H.P. સાથે

45° ના ખૂિે અન ે પાયાથી 20 mm ઉપર છેદે છે. બન્ન ે પાઈપ V.P. ને સમાંિર છે. િેના

પ્રોજકે્શનનો દોરો અને ઇન્ટરસેક્શન લાઈન બિાવો.

૦૭

OR

(b) A vertical cone, diameter of base 56 mm and axis 66 mm long is standing on H.P. on its

base. A cylinder of 30 mm diameter completely penetrated in the cone. The axis of the

cylinder is parallel to H.P. and V.P. and intersect the axis of cone at a point 20 mm above

the base. Draw projections of the solids showing curves of intersection.

07

(બ) એક 56 mm પાયાનો વ્યાસ અને 66 mm ધરીની લંબાઇવાળો ઉભો શંકુ H.P. માં િેના પાયા ઉપર

ઉભો છે. એક 30 mm વ્યાસનો નળાકાર િેને પૂરપેૂરો છેદે છે. નળાકાર ની ધરી H.P. અને V.P. ન ે

સમાંિર છે અનેશંકુની ધરીને પાયાથી 20 mm ઉપર છેદે છે. ઇન્ટરસેક્શન કવુ સાથનેા ઘનોના

પ્રક્ષેપિો દોરો.

૦૭

Q.4 (a) Draw following views of Fig.-1 using “First Angle Projection Method.”

(1) Front View

(2) Sectional Top View

07

પ્રશ્ન. ૪ (અ) ફસ્ટસ એંગલ િોજેક્શન રીતનો ઉપયોગ કરી આકૃસત –1 ન નીચેન દેખ વો દોરો. (1) સ મેનો દેખ વ

(2) છેદ ત્મક ઉપરનો દેખ વ

૦૭

OR

(a) Two views of an object is given. Draw following views of Fig.-2

(1) Sectional Left hand side View.

(2) Top Plan

07

(અ) આકૃસત –2 માં એક વસ્િનુા બ ેદેખાવો આપલેા છે. નીચને દેખ વો દોરો. (1) છેદ ત્મક ડાબી બાજુનો દેખ વ.

(2) ઉપરનો દેખ વ

૦૭

(b) Draw following views of Fig.-3 using “First Angle Projection Method.”

(1) Sectional Front View

(2) Right Hand Side View.

07

(બ) ફસ્ટસ એંગલ િોજેક્શન રીતનો ઉપયોગ કરી આકૃસત –3 ન નીચેન દેખ વો દોરો. (1) છેદાત્મક સ મેનો દેખ વ. (2) જમિી બાજુનો દેખાવ.

૦૭

Q.5 (a) An assembly of drawing of “Socket & Spigot Joint” is shown in Fig – 4. Draw detailed

drawing of each part in two views using “First Angle Projection Method.”Prepare part list. 09

પ્રશ્ન. ૫ (અ) ફસ્ટસ એંગલ િોજેક્શન રીતનો ઉપયોગ કરી આકૃસત – 4 મ દશ સવલે અસેમ્બલી ડ્રોઇંગન દરેક પ ટસન બે દેખ વો દોરો. પ ટસ લીસ્ટ બન વો.

૦૯

(b) Draw surface rough ness symbol for following

I. Roughness value = 8 micron

II. Production method = Milling

III. Sampling length = 60 mm

IV. Machining allowance = 03 mm

V. Type of Lay = Circular

05

(બ) આપલે સવગિ સરફેશ રફનેશની સાંઘ્ન દોરી િેન પર દશ ાાવો.

I. રફ્નેશ = 08 માઇક્રોન

II. પ્રોડક્શન પધ્ધણિ = મીલીગં

III. સેમ્પલીગં લબંાઇ = 60 મીમી

IV. મશીનીગં એલાઉન્સ = 03 મીમી

V. લે ની ણદશા = સક્યુુલર

૦૫

************

4/6

Fig -1 Q-4(a)

Fig -2 Q-4(a) OR

5/6

Fig -3 Q-4(b)

6/6

Fig -4 Q-5(a)

1/8


GUJARAT TECHNOLOGICAL UNIVERSITY DIPLOMA ENGINEERING – SEMESTER – I • EXAMINATION – SUMMER- 2016

Subject Code: 3321901 Date: 16- 06- 2016


Time: 10:30 AM TO 01:30 PM Total Marks: 70 Instructions:







Q.1 Answer any seven out of ten.

14

1. What is bill of material?

2. State the methods of obtaining the line of intersection.

3. Draw the symbols of plug weld & seam weld.

4. Draw the symbols of welded - single “J” joint and double “V” joint.

5. Draw the symbols of vacuum & oil.

6. Draw the symbols of glob valve & safety valve.

7. Draw sketch of snap head rivet and pan head rivet.

8. Draw sketch of ring and wing nut.

9. Draw sketch of union & coupling.

10 Draw pipe line symbols of hot air and hot water.

Q.2 (a) A regular pentagonal pyramid, side of base 30 mm and height 65 mm, lies on

one of its triangular faces in HP. Its axis is parallel to VP. A section plane,

perpendicular to the VP and parallel to the HP, cuts its axis at a point P which

is 7 mm away from its base. Draw its front view and sectional top view.

07

OR

(a) A cylinder, diameter of base 50 mm and height of axis 70 mm, rests on HP on

its base rim such that its axis is inclined at 45˚ to HP and top view of the axis

is inclined at 60˚ to the VP. Draw its projection.

07

(b) Draw the development of given solid in fig.-1 07

OR

(b) Draw the development of given solid in fig.-2 07

Q.3 (a) A cylinder of base diameter 60 mm and 90 mm long, resting on its base on HP.

It is penetrated by a square prism of 36 mm base sides and 90 mm long such

that axis of the solids bisects each other at right angles. The faces of prism are

equally inclined with V.P. Draw the projections of solids showing the line of

intersection.

07

OR

(a) A square prism 40 mm base and 80 mm long is standing on H.P. on its base.

It is penetrated by a horizontal square prism having 30 mm base sides and 80

mm height such that axis of both the prism bisects one – another. Vertical

faces of both prisms are equally inclined with V.P. and axis of both the

prisms are parallel to V.P. Draw projections of these prisms showing the line

of intersection.

07

(b) A cylinder of base diameter 54 mm and height 100 mm, resting on its base in

HP. It is penetrated by another cylinder of base diameter 40 mm. The axis of 07

2/8

penetrating cylinder is inclined to HP at 45˚, is parallel to VP and cuts the axis

of vertical cylinder at a distance of 20 mm from its base. Draw projections of

two cylinders showing the line of intersection. Assuming suitable length of

penetrating cylinder.

OR

(b) A circular cone base diameter 56 mm and height 66 mm, resting on its base on

HP. It is completely penetrated by a cylinder of base diameter 30 mm. The axis

of cylinder is parallel to both HP and VP and intersects the axis at a distance

of 20 mm from its base. Draw projections of solids showing the line of

intersection. Assuming suitable length of penetrating cylinder.

07

Q.4 (a) Draw following views of fig-3 using “First Angle Projection Method”

(1) Sectional Side view

(2) Top view

07

OR

(a) Draw following views of fig-4 using “First Angle Projection Method”

(1) Sectional Elevation – Section MN

(2) Right hand side view

07

(b) Draw following views of fig-5 using “First Angle Projection Method”

(1) Sectional front view

(2) Missing right hand side view

07

Q.5 (a) The detail parts of knuckle joint are shown in the fig -6. Draw the plan and

elevation of assembly. 10

(b) Write details of given surface roughness symbol for fig -7 04

************

ગજુરાતી

પ્રશ્ન. ૧ દશમાાંથી કોઇપણ સાતના જવાબ આપો.

14

૧. બબલ ઓફ મબિરીયલ શુાં છે?

૨. લાઇન ઓફ ઇન્િરસેક્શન ની રીતો જણાવો.

૩. પ્લગ વેલ્ડ અને સીમ વેલ્ડના સીમ્બોલ દોરો.

૪. વેલ્ડી ાંગના બસાંગલ “J” અને ડબલ “V” જોઇન્િના સીમ્બોલ દોરો.

૫. વેક્યુમ અને ઓઇલ માિેના સીમ્બોલ દોરો.

૬. ગ્લોબ વાલ્વ અને સેફ્િી વાલ્વના સીમ્બોલ દોરો.

૭. સ્નેપહેડ રીવેિ અને પાનહેડ રીવેિની આકૃબત દોરો.

૮. રી ાંગ નિ અને વી ાંગ નિ દોરો.

૯. યુબનયન અને કપબલાંગની આકૃબત દોરો.

૧૦. ગરમ હવા અને ગરમ પાણી માિે પાઇપ લાઇન બસમ્બોલ દોરો.

પ્રશ્ન. ર (અ) 30 mm બાજુ અન ે65 mm ઉચાઈ નો એક પાંચકોણીય બપરાબમડ તેના બિકોણીયતલ પર HP.

માાં છે. તેની અક્ષ VP. ન ેસમાતાંર છે. VP. ને લાંબ અન ેHP. ને સમાાંતર એક સેક્શન પ્લેન

બિઝમની ધરી ને તેના પયાથી 7 mm દુર એક બબાંદુ P માાં છેદે છે. આ બપરાબમડનો સામેનો દેખાવ

અને સેક્શનલ િોપ વ્યુ દોરો.

૦૭

OR

3/8

(અ) એક 50 mm પાયાનો વ્યાસ અને 70 mm અક્ષની લાંબાઇનો નળાકાર તેના પાયાની

બકનારી ઉપર એવી રીતે ઉભો છે કે જથેી નળાકારની અક્ષ HP સાથે 45˚ નો ખુણો

બનાવે છે. જો અક્ષનો પ્લાન VP સાથે 60˚ નો ખુણો બનાવતો હોય તો નળાકાર ના

િોજકે્શન દોરો.

૦૭

(બ) આકૃબત-1 નુાં ડેવલપમેન્િ દોરો. ૦૭

OR

(બ) આકૃબત-2 નુાં ડેવલપમેન્િ દોરો. ૦૭

પ્રશ્ન. 3 (અ) એક 60 mm પાયાનો વ્યાસ અને 90 mm ધરીની લાંબાઇ વાળો નળાકાર H.P. માાં

તેના પાયા પર ઉભો છે. તે એક 36 mm પાયાની બાજુ અને 90 mm ધરીની લાંબાઇ

વાળા સમતલ ચોરસ િીઝમથી એવી રીતે છેદ છે કે બને્નની ધરી એકબીજાને કાિખુણે

બ ેસરખા ભાગ કર ેછે. િીઝમની સપાિીઓ V.P. સાથે સરખા ખૂણા બનાવે છે.આ સોલીડના િક્ષેપણો દોરો અને ઇન્િરસેક્શન લાઇન દોરો.

૦૭

OR

(અ) એક 40 mm પાયાની બાજુ અને 80 mm ધરીની લાંબાઇ વાળો ચોરસ િીઝમ H.P.

માાં તેના પાયા પર ઉભો છે. તે એક 30 mm પાયાની બાજુ અને 80 mm ધરીની લાંબાઇ વાળો સમતલ ચોરસ િીઝમથી એવી રીત ેછેદ છે કે બને્નની ધરી ના બ ેસરખા ભાગ થાય. બને્ન િીઝમની ઉભી સપાિીઓ V.P. સાથે સરખા ખૂણા બનાવે છે અને બને્નની ધરી V.P. ને સમાાંતર છે. આ િીઝમની જોડીના િક્ષેપણો દોરો અને ઇન્િરસેક્શન લાઇન દોરો.

૦૭

(બ) એક 54 mm પાયાનો વ્યાસ અને 100 mm ધરીની લાંબાઇ વાળો નળાકાર H.P. માાં તેના

પાયા પર ઉભો છે. તે એક 40 mm પાયાનો વ્યાસ, VP ને સમાાંતર અને HP સાથે 45˚ નો ખુણો બનાવતા બીજા એક નળાકાર વડે ધરી ઉપર પાયાથી 20 mm ઉપર દુભાગ ે

છે. તો બને્ન નળાકારના િક્ષેપણો દોરો અને ઇન્િરસેક્શન લાઇન દોરો. પેનિર ેિી ાંગ

નળાકારની યોગ્ય લાંબાઇ ધારો.

૦૭

OR

(બ) એક 56 mm પાયાનો વ્યાસ અને 66 mm ધરીની લાંબાઇ વાળો શાંકુ H.P. માાં તેના પાયા

પર ઉભો છે. એક 30 mm પાયાનો વ્યાસ ધરવતો નળાકાર શાંકુની ધરીને કાિખુણ ે

પાયાથી 20 mm ઉપર દુભાગે છે. આ સોલીડના િક્ષેપણો દોરો અને ઇન્િરસેક્શન લાઇન

દોરો. પેનિર ેિી ાંગ નળાકારની યોગ્ય લાંબાઇ ધારો.

૦૭

પ્રશ્ન. ૪ (અ) આકૃબત : 3 ના નીચ ેદશાાવેલ વ્યુ દોરો. (િથમ કોબણય િક્ષપેણ પબ્્ત નો ઉપયોગ કરો)

(1) છેદાત્મક બાજુનો દેખાવ.

(2) ઉપરનો દેખાવ.

૦૭

OR

(અ) આકૃબત : 4 ના નીચ ેદશાાવેલ વ્યુ દોરો. (િથમ કોબણય િક્ષપેણ પબ્્ત નો ઉપયોગ કરો)

(1) છેદાત્મક સામેનો દેખાવ.- સકે્શન MN

(2) જમણી બાજુનો દેખાવ.

૦૭

(બ) આકૃબત : 5 ના નીચ ેદશાાવેલ વ્યુ દોરો. (િથમ કોબણય િક્ષપેણ પબ્્ત નો ઉપયોગ કરો)

(1) છેદાત્મક સામેનો દેખાવ.

(2) બમબસાંગ જમણી બાજુનો દેખાવ.

૦૭

પ્રશ્ન. ૫ (અ) આકૃબત – 6 માાં નકલ જોઇન્િના છુિા ભાગો દશાાવેલ છે. એસેમ્બલીનો ઉપરનો

અને સામેનો દેખાવ દોરો. ૧૦

(બ) આકૃબત – 7 માાં દશાાવેલ સરફેસ રફનેસ સીમ્બોલની બવગતો દશાાવો. ૦૪

4/8

Fig-1 Q-2(b)

Fig-2 Q-2(b) OR

5/8

Fig-3 Q-4(a)

6/8

Fig-4 Q-4(a)OR

7/8

Fig-5 Q-4(b)

8/8

Fig-6 Q-5(a)

Fig-7 Q-5(b)

laxmi institute of technology, sarigam · draw isometric and views of an 1b. interpret multi 1.1...

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