Journeyman Plumbers Plumbing Fixtures and Appliances Questions and Answers

Question 1

A plumber is installing a gas-fired water heater with a bottom ignition source in a residential garage.
According to most plumbing codes, what is the minimum required elevation of the ignition source above the garage floor?

Accepted Answer

18 inches

Answer

6 inches

Answer

12 inches

Answer

24 inches

Question 2

Which of the following is a code-compliant method for connecting a domestic dishwasher's drainage hose to the sanitary drainage system to prevent backflow?

Accepted Answer

An approved air gap fitting installed on the countertop.

Answer

A direct connection to the garbage disposal's inlet.

Answer

A P-trap installed exclusively for the dishwasher.

Answer

A simple loop in the drain hose below the sink rim.

Question 3

A journeyman plumber is installing fixtures in an ADA-compliant public restroom. What is the required height range for the toilet seat above the finished floor?

Accepted Answer

17 to 19 inches

Answer

14 to 16 inches

Answer

20 to 22 inches

Answer

23 to 25 inches

Question 4

A Temperature and Pressure (T&P) relief valve on a water heater must have its temperature-sensing element installed in a specific location to function correctly. Where must this element be located?

Accepted Answer

Within the top 6 inches of the tank.

Answer

In the cold water inlet pipe.

Answer

At the midpoint of the water heater tank.

Answer

Within the bottom 6 inches of the tank.

Question 5

In a commercial building, a floor drain is located in a mechanical room that is rarely used, making the trap seal subject to evaporation. Which device is required to maintain the trap seal?

Accepted Answer

A trap primer

Answer

A check valve

Answer

A vacuum breaker

Answer

An air admittance valve

Question 6

When installing a lavatory to meet ADA accessibility standards, which of the following requirements for the pipes under the sink is correct?

Accepted Answer

Pipes must be insulated or configured to protect against contact.

Answer

Pipes must be made of chrome-plated brass.

Answer

A mechanical vent must be installed directly under the sink.

Answer

Pipes must be concealed within a cabinet.

A plumber is installing a gas-fired water heater with a bottom ignition source in a residential garage.According to most plumbing codes, what is the minimum required elevation of the ignition source above the garage floor?

A plumber is installing a gas-fired water heater with a bottom ignition source in a residential garage.
According to most plumbing codes, what is the minimum required elevation of the ignition source above the garage floor?