Practice test

Plumbing Practice Exam 16

Expert plumbing practice exam with 25 tough questions on pipe selection, hot/cold WSFU split, stack DFU, CSST bonding, and disinfection. Scored with explanations.

Free preview

These questions are for study practice only and are not official exam questions.

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?

Enable JavaScript for the interactive step-by-step quiz with instant scoring and explanations.