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Hawaii Plumbing Practice 14

Practice 14 for Plumbing Exam learners in Hawaii: 25 questions, explained answers, and a review routine.

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Question 1

1

A system has 65 psi static, needs 20 psi at a flushometer (its minimum flow pressure), 25 feet elevation, and 6 psi of meter/fitting loss. The friction budget for the pipe is closest to what?

Question 2

2

A water main serves 220 WSFU of mostly flush-tank fixtures. Hunter's curve gives a peak demand near 50 gpm. If you mistakenly used the flushometer curve, the estimated demand would be what, and the pipe would be sized how?

Question 3

3

An RPZ assembly is required where a building connects to a chemical-laden process or boiler with chemical feed. This is an example of protecting against what?

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