A double acting reciprocating pump having piston area

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 double acting reciprocating pump having a piston area of 0.1 m2 has a stroke length of 0.30 m. The pump is discharging 2.4 m3 of water per minute at 45 r.p.m. through a height of 10 m. What is the slip of the pump?

[A] 0.005 m³/s
[B] 0.015 m³/s
[C] 0.025 m³/s
[D] 0.035 m³/s

ANSWER= [A] 0.005 m³/s

Detailed Solution for Civil Engineering Exam

Given data

Double acting reciprocating pump

A = 0.1m²

L = 0.30m

Q = 2.4 m²/min. N = 45rpm

H = 10 m

Slip of pump

Slip = Qth – Qout

Qth = 2ALN/60

Qth = ( 2 * 0.1 * 0.30 * 45 ) /60

Qth = 0.045 m³/s = 2.7 m³/min

Slip = Qth – Qout

Slip = 2.7 – 2.4 = 0.3 m³/min

0.005 m³/sec