VTU Civil Engineering (Semester 3)
Surveying 1
June 2015
Total marks: --
Total time: --
INSTRUCTIONS
(1) Assume appropriate data and state your reasons
(2) Marks are given to the right of every question
(3) Draw neat diagrams wherever necessary

1 (a) List the different methods of surveying. What are their objectives or place of application?
6 M
1 (b) Bring out the difference between 'Precision' and 'Accuracy'.
6 M
1 (c) What is map? State the numbering method in a map.
8 M

2 (a) Brief the working principle of an EDM.
6 M
2 (b) With a neat sketch describe the concept of 'Reciprocal Ranging'.
6 M
2 (c) The length of a line measured with 20.0 chain was 1341.0m. The same line when measured with 30.0 m chain which was 20 cm too short was found to be 1350.00 m. Determine the error in 20.00 m chain.
8 M

3 (a) Explain with a neat sketch, the working of and use of an 'Optical Square'.
6 M
3 (b) Write the procedure to overcome an obstacle for chain surveying when both vision and chaining is obstructed.
6 M
3 (c) Two stations 'P' and 'Q' were taken on southern side bank of a river flowing west to east pt. 'P' is wastewords of pt 'Q' at 75 m apart. The bearings of a tree 'R' on the northern side of the bank is observed to be equal to 38° and 338° respectively from 'P' and 'Q' . Calculate the width of the river.
8 M

4 (a) Distinguish between:
i) WCB and OB
ii) Dip and declination
iii) Magnetic bearing and true bearing with reference to compass surveying.
6 M
4 (b) State how 'Prismatic Compass' is different from 'Surveying Compass'.
6 M
4 (c) Following is a closed traverse ABCDA conducted clockwise. Fore bearing of the lines are as follows: determine the values of included angle and apply the check.
 Line AB BC CD DA FB 40o 70o 210o 280o
8 M

5 (a) Explain 'Bowditch's rule' adopted for adjusting a closed traverse.
8 M
5 (b) The force and book bearing of a closed traverse is given below. Correct the bearing for local attraction, by identifying the stations affected by local attraction.
 Line AB BC CD DA FB 32o 30' 124o 30' 181o 0' 289o 30' BB 214o 30' 303o 15' 1o 0' 108o 45'
12 M

6 (a) Define the following terms with respect to levelling:
i) Bench mark
ii) Backsight
iii) Change point
iv) Fore sight
v) Reduced level
vi) Height of collimation.
6 M
6 (b) What are the 'Temporary Adjustments' of a Dumpy level?
6 M
6 (c) Following observations refer to a 'Reciprocal Levelling'. Calculate the elevation of pt 'B' if that of 'A' is 100.150m, by deterring the collimation error.
 Inst at Staff reading on Remark A 1.824 2.748 AB=1000.00 B 0.928 1.606
8 M

7 (a) Enumerate the characteristics of contour lines.
8 M
7 (b) The following readings were taken with a dumpy level on a sloppy ground at a common interval of 0.5m. The RC of first point is 200.00. Rule on a page of level book and enter the readings. Calculated the reduced levels of all points and the gradient between first and last point 0.405, 1.990, 2.030, 3.120, 3.700, 0.910, 1.815,2.750, 3.660, 0.430, 1.455.
12 M

8 (a) Explain the procedure adopted to measure that distance two mutually inaccessible points by plane table surveying.
6 M
8 (b) State the importance of orientation in plane. What are the methods available for orientation?
6 M
8 (c) Describe the method of 'Resection' by 'Bessel's graphical method'.
8 M

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