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Kentucky Plumbing Practice 16

Practice 16 for Plumbing Exam learners in Kentucky: 25 questions, explained answers, and a review routine.

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Question 1

1

A water service must deliver 90 gpm. The friction budget allows 7 psi per 100 feet. A 2-inch line loses 9 psi per 100 ft at that flow while a 2-1/2 inch loses 3 psi per 100 ft. Which is correct?

Question 2

2

Hunter's method assigns hot and cold WSFU to a fixture. A fixture with both hot and cold supply (like a lavatory) is counted how for the cold-only branch sizing?

Question 3

3

An RPZ test requires the supply shutoff to be closed during certain steps. Why must the tester verify there is no flow demand downstream during the test?

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