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UPSC Civil Service Exam Questions - Engineering

Q1:

If the staff intercept on a staff located at 100 m from the level for five division deviation of the bubble is 0.050 m and if the length of one division of the bubble is 2 mm, then the radius of curvature of the bubble is 0.050 m and if the length of one division of the bubble is 2 mm, then the radius of curvature of the bubble tube is

A 2.02 m

B 2.20 m

C 20.00 m

D 20.20 m

ANS:C - 20.00 m

Tan = s/D = nl/r,
R = nld/s,
R = 20 m.