Plumbing Fixtures & Appliances 3

Question 1

Where should plumber's putty NOT be used?

Accepted Answer

On marble, granite, or plastic fixtures

Answer

Plumber's putty can stain marble, granite, and plastic fixtures — silicone sealant should be used on these surfaces instead.

Question 2

What is the function of a fill valve in a toilet tank?

Accepted Answer

To refill the tank with water after flushing

Answer

The fill valve (ballcock) automatically refills the toilet tank with fresh water after each flush and shuts off when the water reaches the correct level.

Question 3

What is a flapper valve in a toilet and what does it do?

Accepted Answer

A rubber seal that opens during flushing to release tank water into the bowl

Answer

The flapper is a rubber seal at the bottom of the toilet tank that lifts when the toilet is flushed, allowing tank water to flow into the bowl, then reseals the tank.

Question 4

What is the ADA-required height range for a water closet (toilet) seat for accessible bathrooms?

Accepted Answer

17–19 inches AFF

Answer

ADA standards require accessible toilet seats to be between 17 and 19 inches above the finished floor to allow easier transfer for wheelchair users.

Question 5

What is the purpose of the overflow tube in a toilet tank?

Accepted Answer

To prevent the tank from overflowing by routing excess water to the bowl

Answer

The overflow tube prevents tank overflow by routing any excess water directly into the toilet bowl if the fill valve fails to shut off.

Plumbing Practice Test

Plumbing Practice Test

Plumbing Fixtures & Appliances 3