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

UPSC ESE Exam Solution 2021 for Civil Engineering UPSC ESE 2021 GS Paper 1 download exam paper from telegram https://telegram.me/civil_experiences

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?

[A] 15.7 m/s
[B] 13.2 m/s
[C] 9.7 m/s
[D] 11.2 m/s

ANSWER= [A] 15.7 m/s

Detailed Solution for Civil Engineering Exam

Centrifugal Pump

Given Data

H_m = 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

Civil UPSC ESE Exam Solution 2021