# Civil Engineering - Surveying

### Exercise :: Surveying - Section 7

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

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.

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.

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

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