Surveying - Interview Questions | Exam2Win

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21. The allowable length of an offset depends upon the

A. degree of accuracy required

B. method of setting out the perpendiculars and nature of ground

C. scale of plotting

D. all of the above

Explanation:

22. In an internal focussing type of telescope, the lens provided is

A. concave

B. convex

C. plano-convex

D. plano-concave

Explanation:

23. If the R.L. of a B.M. is 100.00 m, the back- sight is 1.215 m and the foresight is 1.870 m, the R.L. of the forward station is

A. 99.345 m

B. 100.345 m

C. 100.655m

D. 101.870m

Explanation:

24. Which of the following errors is not eliminated by the method of repetition of horizontal angle measurement ?

A. error due to eccentricity of verniers

B. error due to displacement of station signals

C. error due to wrong adjustment of line of collimation and trunnion axis

D. error due to inaccurate graduation

Explanation:

25. Which of the following errors can be eliminated by taking mean of bot face observations ?

A. error due to imperfect graduations

B. error due to eccentricity of verniers

C. error due to imperfect adjustment of plate levels

D. error due to line of collimation not being perpendicular to horizontal axis

Explanation: