# Civil Engineering - Surveying

### Exercise :: Surveying - Section 7

41.

The staff reading at a distance of 80 m from a level with the bubble at its centre is 1.31 m. When the bubble is moved by 5 divisions out of the centre, the reading is 1.39 m. The angular value of the one division of the bubble, is

 A. 28.8 secs B. 41.25 secs C. 14.52 secs D. 25.05 E. none of these

Explanation:

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42.

If i is the stadia distance, f is the focal length and d is the distance between the objective and vertical axis of the techeometer, the multiplying constant, is

 A. f/i B. i/f C. (f + d) D. f/d.

Explanation:

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43.

The back staff reading on a B.M. of R.L. 500.000 m is 2.685 m. If foresight reading on a point is 1.345 m, the reduced level of the point, is

 A. 502.685 m B. 501.345 m C. 501.340 m D. 504.030 m E. 502.585 m.

Explanation:

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44.

It is more difficult to obtain good results while measuringhorizontal distance by stepping

 A. up-hill B. down-hill C. in low undulations D. in plane areas.

Explanation:

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45.

The additional lines which are measured to show the correctness of the chain surveying are called:

 A. check clines B. proof lines C. tie lines D. all of these.