If the pumping level gauge reads 10 psi, what would be the calculated pumping level from an air line measuring 150 feet?

To determine the calculated pumping level from an air line measuring 150 feet with a gauge reading of 10 psi, it’s essential to understand how pressure measurements relate to water column height in feet.

Pressure is often expressed in psi (pounds per square inch), and in water systems, there is a conversion factor that can correlate psi to feet of water. Specifically, 1 psi is approximately equivalent to 2.31 feet of water.

Using this conversion factor, we can calculate the height of the water column corresponding to the gauge pressure:

1. First, convert the pressure from psi to feet:

• 10 psi × 2.31 feet/psi = 23.1 feet.

2. Next, subtract this value from the total height of the air line, which measures 150 feet:

• 150 feet - 23.1 feet = 126.9 feet.

Thus, the calculated pumping level is 126.9 feet. This value is consistent with the answer chosen and reflects the correct approach to translating pressure measurements into water column height, confirming that the gauge reading indicates the depth at which water is found relative to the height of the air line.