Civil Engineering - GATE Exam Questions - Discussion

1. 

If the pump head is 75 m, discharge is 0.464 m3/s and the motor speed is 1440 rpm at rated condition, the specific speed of the pump is about

[A]. 4
[B]. 26
[C]. 38
[D]. 1440

Answer: Option C

Explanation:

No answer description available for this question.

Dheeraj said: (Feb 1, 2014)  
Specific speed (Ns) = (N*q^1/2)/H^(3/4).
Substituting,
N=1440,
q=0.464,
H=74,
We get, Ns=38.48.

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