In the friction loss formula FL = C Q^2 L, what does the variable L represent?

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Prepare for the Ben Hirst Fire Apparatus Driver and Operator Exam 1. Utilize flashcards and multiple choice questions, each with hints and explanations. Ace your exam!

Multiple Choice

In the friction loss formula FL = C Q^2 L, what does the variable L represent?

Explanation:
Friction loss in a hose run scales with the length of the hose. In this formula, L is the length of hose from the pump to the nozzle. Since FL is proportional to L, longer hose runs create more friction loss at the same flow and hose characteristics. The flow rate is represented by Q and the coefficient by C, while nozzle pressure is a target you’re trying to achieve at the nozzle—not the length. So the correct interpretation is that L represents the length of hose.

Friction loss in a hose run scales with the length of the hose. In this formula, L is the length of hose from the pump to the nozzle. Since FL is proportional to L, longer hose runs create more friction loss at the same flow and hose characteristics. The flow rate is represented by Q and the coefficient by C, while nozzle pressure is a target you’re trying to achieve at the nozzle—not the length. So the correct interpretation is that L represents the length of hose.

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