Civil Engineering - Surveying

11. 

The surface of zero elevation around the earth, which is slightly irregular and curved, is known as

A. mean sea level
B. geoid surface
C. level surface
D. horizontal surface.

Answer: Option B

Explanation:

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12. 

The lens equation is applicable

A. when the thickness of the lens is small
B. only to conjugate distances along the principal axis
C. the computed quantities are accurate enough for geometrical optics of simple distances
D. all the above.

Answer: Option D

Explanation:

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13. 

The representation of general topography of a very flat terrain is possible only

A. by drawing contours at large interval
B. by drawing contours at small interval
C. by giving spot levels at large interval
D. by giving spot levels to salient features at close interval.

Answer: Option D

Explanation:

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14. 

The bearing of line AB is 152° 30' and angle ABC measured clockwise is 124° 28'. The bearing of BC is

A. 27° 52'
B. 96° 58'
C. 148° 08'
D. 186° 58'

Answer: Option B

Explanation:

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15. 

A transit is oriented by setting its vernier A to read the back azimuth of the preceding line. A back sight on the preceding transit station taken and transit is rotated about its vertical axis. The vernier A reads

A. azimuth of the forward line
B. bearing of the. forward line
C. back bearing of the forward line
D. equal to 360°-azimuth of the forward line.

Answer: Option A

Explanation:

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