Civil Engineering - Surveying

31. 

If + 0.8% grade meets - 0.7% grade and the rate of change of grade for 30 m distance is 0.05, the length of the vertical curve will be

A. 600 m
B. 700 m
C. 800 m
D. 900 m
E. 1000 m

Answer: Option D

Explanation:

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32. 

The included angles of a theodolite traverse, are generally measured

A. clockwise from the forward station
B. anti-clockwise from the back station
C. anti-clockwise from the forward station
D. clockwise from the back station.

Answer: Option D

Explanation:

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33. 

Location of contour gradient for a high way is best set out from

A. ridge down the hill
B. saddle down the hill
C. bottom to the ridge
D. bottom to the saddle.

Answer: Option B

Explanation:

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34. 

If h1 and h2 are the differences in level between ground and the formation levels, m is the slope of the sloping sides. D is the distance between the cross sections then, prismoidal correction for a level section is

A. D/2m(h1 - h2)
B. D/3m(h1 - h2)
C. D/6m(h1 - h2)2
D. D/6m(h1 - h2)3
E. D/6m(h1 + h2)2

Answer: Option C

Explanation:

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35. 

In a telescope the object glass of focal length 14 cm, is located at 20 cm from the diaphragm. The focussing lens is midway between them when a staff 16.50 m away is focussed. The focal length of the focussing lens, is

A. 5.24 cm
B. 6.24 cm
C. 7.24 cm
D. 8.24 cm

Answer: Option C

Explanation:

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