A centrifugal pump has the following specifications: Powe... — Answer & Explanation | PrepBeePakistan

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HomeMCQsChemical Engineering

MEDIUMENGLISHChemical Engineering

A centrifugal pump has the following specifications: Power = 4 H.P.; Speed = 800 rpm Head = 8 metres Flow = 1000 litres/minutes. If its speed is halved, then the new head will be ______________ metres?

Correct answer: A

Explanation

Head is proportional to the square of the speed (H ∝ N²). Halving the speed reduces the head by a factor of $1/2^2$, or $1/4$. The new head will be one-fourth of the original head.

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