Civil Engineering - Surveying

1. 

Pick up the correct statement from the following :

A. The directions of plumb lines suspended at different points in a survey are not strictly parallel
B. In surveys of small extent, the effect of curvature may be ignored and the level surface of the earth is assumed as horizontal
C. In surveys of large extent, the effect of curvature of the earth must be considered
D. All the above.

Answer: Option D

Explanation:

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2. 

If Δ is the angle of deflection of a simple curve of radius R, the length of its long chord, is

A. R cos
B. 2R cos
C. R sin
D. 2R sin .

Answer: Option D

Explanation:

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3. 

In geodetic surveys higher accuracy is achieved, if

A. curvature of the earth surface is ignored
B. curvature of the earth surface is taken into account
C. angles between the curved lines are treated as plane angles
D. none of these.

Answer: Option B

Explanation:

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4. 

Determining the difference in elevation between two points on the surface of the earth, is known as

A. levelling
B. simple levelling
C. differential levelling
D. longitudinal levelling.

Answer: Option C

Explanation:

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5. 

Contours of different elevations may cross each other only in the case of

A. an over hanging cliff
B. a vertical cliff
C. a saddle
D. an inclined plane.

Answer: Option A

Explanation:

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