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III Semester B.E. (Civil) Degree Examination, January 2013 (2K11 Scheme) CE 302 : SURVEYING THEORY – I Time : 3 Hours

Max. Marks : 100

Instructions : 1) Question 8 is compulsory. 2) Answer any four from the remaining. 3) All questions carry equal marks. (i.e. 20 marks). 1. a) Explain the features of metric chain and a revenue chain. b) Differentiate between the following : i) Whole circle bearing and quadrantal bearing. ii) Magnetic bearing and true bearing.

6

(2×3=6)

c) The following F.B and B.B were observed in a compass traversing in a place where local attraction was suspected. Compute the correct bearings of the lines. Line

FB

BB

AB

38 °30′

BC CD

100°4 5′ 25 °45′

219°15′ 278°30′

DE

325°1 5′

145°1 5′

EA

190°3 0′

10° 15′

8

207°30′

2. a) Define the following in plane table surveying. i) Radiation ii) Intersection iii) Orientation.

(2×3=6)

b) What are the advantages and disadvantages of plane table surveying ?

8

c) Explain the procedure for plane table traversing.

6

P.T.O.

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3. a) Explain the term “Strength of fix” in plane tabling.

5

b) Mention the errors in plane tabling.

5

c) State three point problem in plane table survey. Explain the procedure for “Bessele’s method solution for the same. 4. a) Define the following terms in levelling :

10 (2×5=10)

i) Level line ii) Horizontal line iii) Datum surface. iv) Reduced level. v) Line of collimation. b) The following consecutive readings are taken with a level and a 4 m levelling staff along continuously sloping line AB at a common interval of 20 meter. 0.385, 1.030, 1.925, 2.825, 0.625, 2.005, 3.110 m. The RL of the first point was 200.000 meter. Calculate the RL’s of each point by rise and fall method and calculate the gradient of the line joining first and last point. 5. a) Explain the following :

10 (4×2=8)

i) Profile levelling ii) Reciprocal levelling. b) How is the sensitiveness of a bubble tube determined ?

6

c) Determine the radius of curvature of the bubble tube if length of one division is 2 mm and the angular value of one division is (i) 3 0′′ (ii) 1′ .

(3×2=6)

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6. a) Derive the expressions to compute the area by Simpson’s rule.

10

b) What are the precautions to be taken while using a planimeter ?

5

c) While measuring the area of a plan using a planimeter the following readings were observed when the figure was traced with the anchor point outside. The zero mark of disc crossed the index in clockwise direction twice. Multiplying constant = 100 cm2 Initial reading = 8.378 Final reading = 1.436. Calculate the area of the figure.

5

7. a) Write a computer programme in ‘C’ for the calculation of area by trapezoidal rule.

10

b) Explain : i) The method of programme in reducing levels from the field data. ii) Calculation of volume by prismoidal formula.

(5×2=10)

8. Write short notes on the following : i) Working from whole to part ii) Compass traversing iii) Area of zero circle. iv) Two point problem in plane tabling v) Magnetic declination.

(4×5=20) ______________