:rED (10)_ 3002

(REVISION 20r0)Reg. \o.

Signature

SECOND SIIMESTT,R DIPLON,{A EXAMINA.ION IN]'ITCINOLOGY -- OCTOBER. 2016

SURVEYING _ I(Common for CE, AR, eS, EV and WR)

(Maximum marks : 100)

IINiGII{IltrRING/

fTime : 3 hours

Marks

PART __ A(Maximum marks : l0)

Answer the following questions in one or two sentences. Each question carries2 marks.

1. List the accessories of chain surveying.

2. Differentiate between true bearing and magnetic bearing.

3. Differentiate between back sight and fore sight.

4. What are the types of Orientation ?

5. Name and state any two formulae for computation of capacity of reservoir.(5x2: l0)

PART - B

(Ma:<imum marks : 30)

Answer any.five questions from the fbllowing. Each question carries 6 marks.

L What are the functions of U-frame, alidade, spirit level and trough compass ?

2. Explain clearly the difference between a prismatic compass and surveyor'scompass.

3. Define offset,.check line, and tie line.

4. Convert the fcillowing WCB to quadrant bearings.

(a) 350o12' (b) 117"24' (c) 68o51' (d) 212"04'

5. ln reciprocal leveling across a river two pegs A and B hxed. The instrument

near A, staffreadings at A and B are 0.550 and 0.710m respectively. Then with

the instrument near B. staff readings at B and A are 1.520 and 2'270m

respectively. Calculate the true level difference between A and B.

6. What are the important uses of contour map ?

7. Find the correction for curvature and refraction to a clistance of :

(a) 1200m.

l40l

(b) 4.skm (5x6 30)

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Marks

PART' C

(Maximum marks : 60)

(Answer one flllquestion lrom each unit. Each full question carries 15 marks.)

Urrr - I

III (a) Explain with sketches the intersection methods of plane tabling. 7

(b) Prepare a survey plan and determine the area of the field lrom the followingobservations.

800 (E)

650 200 (D)

(F) 180 400

280 150 (c)(G) 160 140

100 50 (B)

o(A) 8

On

ry (a) Explain the merits and demerits of plane tabling. 7

(b) A chain line AB is obstructed by a building. From a point C near one end ofthe building on AB, a perpendicular CE = 400m is set but and from E two linesED and EF are laid down at an angle of 45o and 60o, with CE respectively;determine the length of ED and EF and the obstructed distance CD. Points Dand F lie on the chain line AB. g

Uxlr - II

V (a) What are the methods of plotting on a compass traverse 'i Explain any one. 7

(b) The following are the bearing of the sides of a closed compass traverseABCDEA. Test and correct the values of the bearing for local attraction.

Line Fore bearing Back bearing

AB N 55.00'E S 54"00, wBC S67.30'E N66000,wcD s 25.00'w N 25"00' E

DE S77"00'W N75030'r1FA S 64"30'W S 63030'E g

On

VI (a) In the closed traverse ABCDA, the bearing of the line AR was measuredas 136030' . l'he included angles were measured as ZA = 21o30, :

/B = 76o45' ; 1c: 178'15' and /n = 83o30'. calculate the bearing ofall other sides. 'l

(b) Define the following :

(i) Irue meridiar-r (iii) Grid line meridian

(ii) Magnetic meridian (iv) Arbitrary.meridiaur g

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Marks

Urn III

vll (a) Describe the effects of curvature and refraction in leveling. 7

(b) The following staff readings were observed successively with a level and 4mleveling staff in a continuously sloping ground at 20m intervals ;

0.585 on A, 0.935, 1.955, 2.835, 3.640, 0.965, 1.035, 1.690,2.535,3.845, 0.955, 1.580, 3.015 on B. The RL of the starting pointA was280.650. Make up the level book and applying the usual check. Determine

e gradient of the line AB. g

'On

VIII (a) Describe the temporary adjustment of leveling. 7

(b) The following staff readings were observed successively with a dumpy level

3.965, 3.345, 2.930, 1.950, 0.955, 3.795, _2.640, _1.540, _1.935,

0.965, 0.665.

The level was shifted after fiflh and eighth reading (Reading 7,8, g are inverted).The first staff reading was taken on a BM of RL 150.250m. Calculate the Ri,of the change point and the difference of levels between the first and last points. 8

Uxrr - IV

D( (a) What is meant by contouring ? Describe the Grid ot square methods ofcontouring. 7

(b) Describe in details the process of cross-sectioning. 8

On

X (a) Describe how you establish a grade contow by the level. 7

(b) While running fly levels from a BM of RL 100.000, the following staff readingswere obtained.

B S |.290 3.115 0.235 3.755

F S 0.025 0.975 3.565

From the position of the instrument last station 4 pegs are to be set up at an'intervals of 30m such that the type of the pegs are at a rising gadient ofI in 100. The RL of the top of thefirst peg is to be 100.125. Work out thestaff reading required for the setting pegs on the given gradient and enteringthe results in a level book form. g

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