Civil Engineering - Surveying

46. 

The sensitiveness of a level tube decreases if

A. radius of curvature of its inner surface is increased
B. diameter of the tube is increased
C. length of the vapour bubble is increased
D. both viscosity and surface tension are increased.

Answer: Option D

Explanation:

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47. 

For true difference in elevations between two points A and B, the level must be set up

A. at any point between A and B
B. at the exact mid point of A and B
C. near the point A
D. near the point B.

Answer: Option B

Explanation:

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48. 

ABCD is a regular parallelogram plot of land whose angle BAD is 60°. If the bearing of the line AB is 30°, the bearing of CD, is

A. 90°
B. 120°
C. 210°
D. 270°

Answer: Option C

Explanation:

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49. 

Keeping the instrument height as 1.5 m, length of staff 4 m, the slope of the ground as 1 in 10, the sight on the down-slope, must be less than

A. 30 m
B. 25 m
C. 20 m
D. 15 m

Answer: Option B

Explanation:

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50. 

Pick up the correct statement from the following :

A. Box sextant is used for the measurement of horizontal angles
B. Cross staff is used for setting out right angles
C. Gradiometer is used for setting out any required gradient
D. Line ranger is used for locating intermediate stations on a survey line
E. All the above.

Answer: Option E

Explanation:

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