Civil Engineering - Surveying

11. 

In optical reading instruments

A. the vertical circle is usually continuous from 0° to 359°
B. the readings increase when the telescope is elevated in the face left position
C. the readings decrease when the telescope is elevated in the face right position
D. all the above.

Answer: Option D

Explanation:

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12. 

For setting out a simple curve, using two theodolites.

A. offsets from tangents are required
B. offsets from chord produced are required
C. offsets from long chord are required
D. deflection angles from Rankine's formula are required
E. none of these.

Answer: Option E

Explanation:

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13. 

Geodetic surveying is undertaken

A. for production of accurate maps of wide areas
B. for developing the science of geodesy
C. making use of most accurate instruments and methods of observation
D. for determination of accurate positions on the earth's surface of system of control points
E. all the above.

Answer: Option E

Explanation:

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14. 

The desired sensitivity of a bubble tube with 2 mm divisions is 30". The radius of the bubble tube should be

A. 13.75 m
B. 3.44 m
C. 1375 m
D. none of these.

Answer: Option A

Explanation:

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15. 

A dumpy level was set up at the midpoint between two pegs A and B, 50 m apart and the staff readings at A and B were 1.22 and 1.06. With the level set up a A, the readings at A and B were 1.55 and 1.37. The collimation error per 100 m length of sight is

A. 0.02 m inclined upwards
B. 0.04 m inclined downwards
C. 0.04 m inclined upward
D. none of these.

Answer: Option B

Explanation:

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