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UPSC Civil Service Exam Questions - Engineering

Q1:

A river model is constructed to a horizontal scale of 1:1000 and a vertical scale of 1:100. A model discharge in the prototype, of what magnitude ?

A 102 m3 /s

B 103 m3 /s

C 104 m3 /s

D 105 m3 /s

ANS:D - 105 m3 /s

According to me, the solution is;

Discharge ratio corresponding to the model and prototype.

Qm/Qp=Lr*hr^(3÷2),
0.1/Qp=1/1000*1/100^(3÷2),
Qp=0.1*1000*100,
Qp=10^5.