A rooftop cooling tower connected to a basement pump shows 140 PSIG at the pump inlet with the pump off. The corresponding water column height is closest to which value (feet)?

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Multiple Choice

A rooftop cooling tower connected to a basement pump shows 140 PSIG at the pump inlet with the pump off. The corresponding water column height is closest to which value (feet)?

Explanation:
Converting pressure to a hydrostatic head in water. For water, 1 psi equals about 2.31 feet of water (or equivalently, 0.433 psi per vertical foot). With 140 psi at the pump inlet, the corresponding water column height is 140 × 2.31 ≈ 323 feet. So the static head the pump would see is about 323 feet of water, which is the closest value.

Converting pressure to a hydrostatic head in water. For water, 1 psi equals about 2.31 feet of water (or equivalently, 0.433 psi per vertical foot). With 140 psi at the pump inlet, the corresponding water column height is 140 × 2.31 ≈ 323 feet. So the static head the pump would see is about 323 feet of water, which is the closest value.

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