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UPSC Civil Service Exam Questions

Q1: The two-peg test in the adjustment of a dumpy level employs the principle that

A equal lengths at back sight and fore sight do not affect the difference in level.

B reciprocal levelling eliminates errors of non-parallel instrument and collimation axes.

C two readings from the same station will minimize errors in bubble tube axis.

D correction is made for verticle axis at one peg and for horizontal axis at the other peg.

ANS:A - equal lengths at back sight and fore sight do not affect the difference in level.

No answer description is available.



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