Civil Engineering - Surveying

6. 

The radius of curvature of the arc of the bubble tube is generally kept

A. 10 m
B. 25 m
C. 50 m
D. 100 m

Answer: Option D

Explanation:

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7. 

If S is the length of a subchord and R is the radius of simple curve, the angle of deflection between its tangent and sub-chord, in minutes, is equal to

A. 573 S/R
B. 573 R/S
C. 171.9 S/R
D. 1718.9 R/S
E. 1718.9 S/R.

Answer: Option E

Explanation:

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8. 

The real image of an object formed by the objective, must lie

A. in the plane of cross hairs
B. at the centre of the telescope
C. at the optical centre of the eye-piece
D. anywhere inside the telescope.

Answer: Option A

Explanation:

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9. 

In chain surveying tie lines are primarily provided

A. to check the accuracy of the survey
B. to take offsets for detail survey
C. to avoid long offsets from chain lines
D. to increase the number of chain lines.

Answer: Option C

Explanation:

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10. 

Pick up the correct statement from the following :

A. the tangent screw enables to give small movement under conditions of smooth and positive control
B. standing on the tripod is the levelling head or trib arch
C. the levelling screws are used to tilt the instrument so that its rotation axis is truly vertical
D. all the above.

Answer: Option D

Explanation:

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