Based on fan laws, when speed and flow rate remain unchanged, how do pressure and power relate to the density of air or gas?

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 a fixed speed and flow rate, both pressure and power are directly proportional to the density of the air or gas. This means that as density increases, pressure and power increase proportionally.

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