Journeyman Plumbers Exam Plumbing Fixtures and Appliances 3

Question 1

Which appliance requires a dedicated GFCI-protected circuit AND a plumbing drain connection?

Accepted Answer

Clothes washer

Answer

A clothes washer requires both a dedicated electrical circuit (with GFCI in some locations) and a standpipe drain connection for proper installation.

Question 2

The minimum standpipe height for a clothes washer drain receptor above the trap weir is:

Accepted Answer

24 inches

Answer

The IPC requires a standpipe receptor for clothes washers to extend a minimum of 24 inches above the trap weir to prevent backflow.

Question 3

A water heater temperature and pressure (T&P) relief valve discharge pipe must terminate:

Accepted Answer

At a floor drain or within 6 inches of the floor

Answer

The T&P relief valve discharge must terminate at a safe point of discharge, typically within 6 inches of the floor or into a floor drain, to prevent scalding.

Question 4

What is the purpose of the air gap on a dishwasher drain connection?

Accepted Answer

To prevent backflow of contaminated water into the dishwasher

Answer

The air gap provides a physical break in the drain line to prevent contaminated sink or disposal water from siphoning back into the dishwasher.

Question 5

A garbage disposal should be connected to the drain system using:

Accepted Answer

A 1-1/2 inch trap and drain minimum

Answer

Garbage disposals require a minimum 1-1/2 inch trap and drain connection to handle the ground food waste without clogging.

Journeyman Plumbers Exam Practice Test

Journeyman Plumbers Exam Practice Test

Journeyman Plumbers Exam Plumbing Fixtures and Appliances 3