Based on fan laws, when pressure remains constant, how do speed, capacity, and power change with respect to air or gas density?

Hydraulic Machines MCQs for PPSC, FPSC, NTS, and Pakistan government job tests. Select an option below, then read the explanation.

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Subject
Hydraulic Machinesmechanical-engineering-mcqs › hydraulic-machines
Published
23 Jan 2019
Last updated
28 May 2026

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Explanation

According to fan laws at constant pressure, speed, capacity, and power vary inversely with the square root of the air or gas density. This means as density increases, these parameters decrease following that relationship.

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