If a centrifugal pump has an impeller speed of N (in rpm) discharge Q (in m 3 /s) and the total head H (in m), the expression for the specific speed N s of the pump is given by

Correct Answer is : Ns=NQ0.5H0.75

GATE Civil Engineering (CE) 2017 Shift 2 Solved Paper

Question : 17 of 65

Marks: +1, -0

If a centrifugal pump has an impeller speed of N (in rpm) discharge Q (in m³/s) and the total head H (in m), the expression for the specific speed N_s of the pump is given by

$N_{s} = \;{NQ^{0.5}}/{H^{0.5}}$
$N_{s} = \;{NQ^{0.5}}/{H}$
$N_{s} = \;{NQ^{0.5}}/{H^{0.75}}$
$N_{s} = \;{NQ}/{H^{0.75}}\:$

Validate

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