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*ED691* III Semester B.E. (Civil) Degree Examination, December 2014/ January 2015 (2K11 Scheme) CE–302 : SURVEYING THEORY – I Time : 3 Hours
Max. Marks : 100
Instructions :1) Answer question No.8 and any four from the remaining seven questions. 2) Missing data may be assumed suitably. 1. a) Explain the principles of surveying and differentiate clearly between Plane and Geodetic surveying.
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b) Explain the following terms : i) Check line
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ii) Base line
c) The following bearings were observed in a compass traverse : Line FB BB AB
305 00′
125 3 0′
BC
75 3 0′
254 30′
CD
115 3 0′
297 00′
DE
165 3 0′
345 30′
EA 225 00′ 44 0 0′ At what stations you suspect local attraction ? Find the corrected bearings.
2. a) Explain the advantages and disadvantages of plane table surveying.
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b) Explain the following terms used in plane table surveying. i) Radiation
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ii) Resection
c) State three point problem in plane tabling and describe the solution by Bessel’s graphical method. 3. a) What are the different sources of errors in plane tabling ?
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b) With neat sketches, explain the various methods of orienting the plane table.
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c) What is two-point problem ? How is it solved ?
8 P.T.O.
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*ED691*
4. a) Define the following terms : i) Level Surface ii) Bench mark iii) Reduced level iv) Change point v) Line of collimation. b) The following staff readings were observed successively with a level, the instrument having been moved after third, sixth and eighth readings.
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1.225, 0.980, 0.425, 2.335, 2.125, 1.355, 0.785, 1.535, 1.685 and 2.680 meters. Enter the above readings in a page of a level book and calculate the R.L. of points if the first reading was taken with a staff held on a bench mark of 238.450 meters apply the checks. 5. a) Define the terms : i) Contour line ii) Contour Interval iii) Horizontal equivalent
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b) Explain with sketches, the characteristics of contours
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c) Explain the uses of contour maps.
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6. a) What is Simpson’s rule ? Derive an expression for the same.
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b) The following perpendicular affects were taken at 10 m intervals from a chain line to an irregular boundary line 3.10, 4.20, 5.35, 6.45, 7.15, 8.25, 7.95 and 5.20m. Find the area by : i) Trapezoidal rule
ii) Simpson’s rule.
c) A railway embankment is 10 m wide with side slopes 1.5 to 1. Assuming the ground to be level in a direction transverse to the centre line, calculate the volume contained in a length of 120 metres, the centre heights at 20 m intervals being 2.20, 3.70, 3.80, 4.0, 3.80, 2.80 and 2.50 metres.
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7. Write a computer programme for the following. a) Reducing the levels from the field data by height of instrument and Rise and Fall method. 10 b) Calculation of the area bounded between chain line and hedge, from the field data, by Simpson’s rule and Trapezoidal rule. 10
*ED691*
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8. Write short notes on any four of the following : i) Reciprocal ranging ii) Plane table traversing iii) Sensitiveness of bubble tube iv) Bowditch rule v) Planimeter vi) Local attraction. _________________
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(4×5=20)
