» Unlabelled » Which of the following errors can be neutralised by setting the level midway between the two stations ?

Friday, 20 September 2013

Which of the following errors can be neutralised by setting the level midway between the two stations ?

a)    error due to curvature only
b)    error due to refraction only
c)    error due to both curvature and re-fraction
d)    none of the above

Ans: c


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