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UPSC Civil Service Exam Questions - Engineering

Q1:

If a sluice gate produces a change in the depth of water from 3.0 m to 0.6 m, then the force on the gate is about

A 9.5 kN/m

B 19.0 kN/m

C 38.0 kN/m

D 76.0 kN/m

ANS:C - 38.0 kN/m

Option C is correct.
force = Y*(y2-y1)^3/y1y2
= 9810 * 2.4^3/ 3*0.6.
= 38.