Surveying MCQ Question and Answer - Set 16 - ObjectiveBooks
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# Practice Test: Question Set - 16

1. The back staff reading on a B.M. of R.L. 500.000 m is 2.685 m. If foresight reading on a point is 1.345 m, the reduced level of the point, is
(A) 502.685 m
(B) 501.345 m
(C) 501.340 m
(D) 504.030 m

2. Let angular value of one graduation of a tube of length ‘x’ be ‘φ’ seconds and ‘R’ be the radius of its internal curved surface, then
(A) φ = x/206265 R
(B) φ = R/206265 x
(C) φ = 206265/x. R
(D) φ = x. R/206265

3. If ‘L’ is in kilometres, the curvature correction is
(A) 58.2 L2 mm
(B) 64.8 L2 mm
(C) 74.8 L2 mm
(D) 78.4 L2 mm

4. Pick up the correct statement from the following:
(A) To locate a gross error in bearing that may exist in controlled theodolite traverse, we may plot the traverse from each end. The traverse station having the same coordinates by each route is the one where the error lies
(B) To locate a gross error in bearing, in a controlled traverse, we plot the traverse and the station through which perpendicular to sector of the closing line passes is the station at which the error was made
(C) To locate a gross error due to taping in a controlled traverse, we plot the traverse to a convenient scale. The bearing of the closing error will be approximately the same as that of the leg in which the gross error consists
(D) All the above

5. Permanent adjustments of a level are
(A) 2 in number
(B) 3 in number
(C) 4 in number
(D) 6 in number

6. Orientation of a plane table by solving two point problems is only adopted when
(A) Saving of time is a main factor
(B) Better accuracy is a main factor
(C) Given points are inaccessible
(D) None of these

7. If ‘V’ is the speed of a locomotive in km per hour, ‘g’ is the acceleration due to gravity, ‘G’ is the distance between running faces of the rails and ‘R’ is the radius of the circular curve, the required super elevation is
(A) gV2/GR
(B) Rg/GV2
(C) GR/gV2
(D) GV2/gR

8. Pick up the correct statement from the following:
(A) Spherical aberration may be reduced by diminishing the aperture
(B) Spherical aberration may be minimised by replacing the single lens by a combination of the lenses
(C) In telescope objectives, a combination of convex lens and concave lens is used
(D) All the above

9. The method generally preferred to for contouring an undulating area, is
(A) Chain surveying
(B) Plane table surveying
(C) Tacheometrical surveying
(D) Compass surveying

10. Measuring with a 30 m chain, 0.01 m too short, introduces
(A) Positive compensating error
(B) Negative compensating error
(C) Positive cumulative error
(D) Negative cumulative error

11. The ratio of the radius and apex distance of a curve deflecting through Δ°, is
(A) sec (Δ/2) - 1
(B) 1 - sec (Δ/2)
(C) cos (Δ/2) - 1
(D) tan (Δ/2) - 1

12. In setting up a plane table at any station
(A) Levelling is done first
(B) Centering is done first
(C) Both levelling and centering are done simultaneously
(D) Orientation is done first

13. Staff readings on pegs x and y from X station are 1.755 m and 2.850 m, and from station Y on staff head at Y and X are 0.655 m and 1.560 m. If reduced level of X is 105.5 m, the reduced level of Y is
(A) 104.0 m
(B) 104.5 m
(C) 105.0 m
(D) 105.5 m

14. Metric chains are generally available in
(A) 10 m and 20 m length
(B) 15 m and 20 m length
(C) 20 m and 30 m length
(D) 25 m and 100 m length

15. The bearing of AB is 190° and that of CB is 260° 30'. The included angle ABC, is
(A) 80° 30'
(B) 99° 30'
(C) 70° 30'
(D) None of these

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