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What happens to the head loss when the flow rate is doubled?

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+2 votes
in Fluid Mechanics by (118k points)
What happens to the head loss when the flow rate is doubled?

(a) Doubles

(b) Same

(c) Triples

(d) Four times

This question was posed to me during an internship interview.

My doubt stems from Loss of Head due to Friction in Viscous Flow topic in division Viscous Flow & Turbulent Flow of Fluid Mechanics

1 Answer

+2 votes
by (362k points)
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Best answer
Right option is (d) Four times

Best explanation: If the flow rate is doubled, the head loss increases by a factor of four. Since, the head loss is directly proportional to the square of the flow rate. Option (d) is the correct option.

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