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, the new discharge will be __________ litres/minute ?
Correct answer: A. 500
- A. 500
- B. 200
- C. 1000
- D. 750
Explanation
The centrifugal-pump affinity law gives Q proportional to speed when the impeller diameter is unchanged. Halving the speed therefore halves the discharge from 1000 to 500 litres/minute.
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