Allied & ICAR Exam Bank • ALLIED_0938 NAT • 2 Marks

Section 5: Irrigation and Drainage Engineering

Irrigation Pumps

Subtopic: Irrigation Pumps

Question Statement:

An irrigation pump operates at atmospheric pressure head $H_{atm} = 10.3\text{ m}$, suction lift $h_s = 3.5\text{ m}$, suction pipe friction loss $h_{fs} = 0.8\text{ m}$, and water vapor pressure head $H_v = 0.5\text{ m}$. Net Positive Suction Head Available is $NPSHA = H_{atm} - h_s - h_{fs} - H_v = 10.3 - 3.5 - 0.8 - 0.5$. The $NPSHA$ in meters is:

Answer Key:

5.5

Step-by-Step Solution & Explanation

$NPSHA = 10.3 - (3.5 + 0.8 + 0.5) = 10.3 - 4.8 = 5.5\text{ m}$.
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