Civil Engineering - UPSC Civil Service Exam Questions - Discussion

4. 

In a trigonometric levelling, the height of the signal used is 4.62 m and the instrument height is 1.25 m. If the horizontal distance of the target from the instrument is 5780 m, then the axis-signal correction is

[A]. seconds
[B]. seconds
[C]. seconds
[D]. seconds

Answer: Option D

Explanation:

No answer description available for this question.

Vai said: (Nov 3, 2017)  
Axis angle correction = (s2 - h1) / (D sin 1") = (s2 - h1) * 206265/ D.

A is the correct answer.

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