If the reservoir level is 150 feet above a hydrant, what is the static reading at the hydrant in psi?

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Prepare for the Apparatus Operator/Pumper Test. Utilize flashcards and multiple-choice queries, complete with hints and explanations. Ensure success on your exam!

Multiple Choice

If the reservoir level is 150 feet above a hydrant, what is the static reading at the hydrant in psi?

Explanation:
Hydrostatic pressure from a static water column equals the height of water above the point converted to pressure. With 150 feet of head, the pressure is 150 ft × about 0.434 psi per foot ≈ 65.1 psi. So the hydrant would show roughly 65 psi when static. (Using 0.433 psi/ft gives about 64.95 psi, essentially 65.0 psi.) This is purely due to the weight of the water above the hydrant, with no flow or pumping involved.

Hydrostatic pressure from a static water column equals the height of water above the point converted to pressure. With 150 feet of head, the pressure is 150 ft × about 0.434 psi per foot ≈ 65.1 psi. So the hydrant would show roughly 65 psi when static. (Using 0.433 psi/ft gives about 64.95 psi, essentially 65.0 psi.) This is purely due to the weight of the water above the hydrant, with no flow or pumping involved.

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