# A centrifugal pump delivers water against a net head of 14.5 meer a design speed of 1000 RPM | Civil UPSC ESE Exam Solution 2021

## Civil UPSC ESE Exam Solution 2021

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## A centrifugal pump delivers water against a net head of 14.5 meer a design speed of 1000 RPM. The vanes are curved back to an angle of 30° with the periphery. The impeller diameter is 300mm and the outlet width is 50mm. What is the tangential velocity of the impeller at the outlet?

### Detailed Solution for Civil Engineering Exam

Centrifugal Pump

Given Data

Hm = 14.5 m

N = 1000 rpm

β2 = 30°

D2 = 300 mm

B2 = 50 mm

u2 = ?

The tangential velocity of the impeller at an outlet (u2)

u2 = (ΠD2N/60)

u2 = (Π × 300 × 10-3× 1000)/60

u2 = 15.7 m/s

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