Mechanical Engineering - Hydraulic Machines - Discussion

Discussion Forum : Hydraulic Machines - Section 1 (Q.No. 19)
19.
The specific speed of a centrifugal pump, delivering 750 litres of water per second against a head of 15 metres at 725 r.p.m., is
24.8 r.p.m.
48.2 r.p.m
82.4 r.p.m.
248 r.p.m
Answer: Option
Explanation:
No answer description is available. Let's discuss.
Discussion:
2 comments Page 1 of 1.

Santosh kumar sahu said:   9 years ago
Ns=N*(Q)^0.5/(H)^0.75.

So
Ns = 725*0.75^0.5/15^0.75.
Ns = 82.4 rpm.
(2)

U Balamurugan said:   1 decade ago
Formula for calculating specific speed Ns=N*(Q)^0.5/(H)^0.75.

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