Massachusetts Wastewater Practice Exam

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If you convert 45 feet of water pressure, what is the result in PSI?

10.2 PSI
19.5 PSI
45 PSI
60 PSI

The correct answer is: 19.5 PSI

To convert water pressure from feet to pounds per square inch (PSI), you can use the conversion factor where 1 foot of water is approximately equal to 0.4335 PSI. To perform the conversion, you would multiply the height of the water column in feet by the conversion factor: 45 feet * 0.4335 PSI/foot = 19.5 PSI. This result reflects the atmospheric pressure exerted by a column of water that is 45 feet high. The calculated value indicates the pressure at the base of the water column due to the weight of the water. This conversion is essential in wastewater management and other engineering-related fields, ensuring accurate pressure readings for system operations. Thus, the correct answer reflects the conversion of 45 feet of water pressure to its equivalent in PSI.