FREE Journeyman Plumbers Fixture Installation and Repair Questions and Answers

Question 1

A plumber is installing a new kitchen faucet.
After connecting the water supply lines and before turning on the main water, what is the MOST critical step to perform to ensure a leak-free installation?

Accepted Answer

Apply thread sealant or PTFE tape to all threaded connections.

Answer

Ensure the faucet is centered in the sink opening.

Answer

Tighten all nuts and bolts to their maximum torque specification.

Answer

Bleed air from the hot and cold supply lines.

Question 2

During the repair of a leaking toilet tank, a plumber discovers that the flapper valve is old and deteriorated. Which of the following is the MOST common issue caused by a faulty flapper valve?

Accepted Answer

A continuously running toilet.

Answer

Reduced water pressure at other fixtures.

Answer

Clogging of the toilet bowl.

Answer

A noisy refill cycle.

Question 3

A homeowner reports low water pressure specifically at their bathroom shower head, but other fixtures in the house seem fine. The shower head has been cleaned and checked for blockages. What is the MOST likely cause of this localized low pressure?

Accepted Answer

Mineral buildup or debris in the shower's mixing valve or supply lines.

Answer

A main water supply line restriction.

Answer

A partially closed main shut-off valve.

Answer

A failing pressure reducing valve (PRV) for the entire house.

Question 4

When installing a new garbage disposal, which of the following connections typically requires the use of a non-metallic, flexible drain hose or a rubber coupling?

Accepted Answer

The connection from the disposal outlet to the trap assembly.

Answer

The connection to the electrical power supply.

Answer

The connection to the dishwasher drain inlet.

Answer

The connection to the cold water supply line.

Question 5

A plumber is replacing a leaky bathtub spout. After removing the old spout, they notice that the new spout threads do not fully engage with the stub-out pipe's threads, even when tightened significantly. What is the MOST appropriate corrective action?

Accepted Answer

Use a longer, threaded adapter nipple to extend the stub-out.

Answer

Apply extra PTFE tape to the new spout's threads to fill the gap.

Answer

Force the new spout onto the existing threads until it holds.

Answer

Replace the entire mixing valve assembly.

Question 6

Which of the following describes the primary function of a diverter valve in a bathtub/shower combination fixture?

Accepted Answer

To switch the water flow between the tub spout and the shower head.

Answer

To regulate the water temperature for the shower.

Answer

To control the water flow rate to the tub spout.

Answer

To prevent backflow into the hot and cold water supply lines.

A plumber is installing a new kitchen faucet.After connecting the water supply lines and before turning on the main water, what is the MOST critical step to perform to ensure a leak-free installation?

A plumber is installing a new kitchen faucet.
After connecting the water supply lines and before turning on the main water, what is the MOST critical step to perform to ensure a leak-free installation?