PC PC Fixture & Appliance Installation

Question 1

When setting a toilet flange, at what height relative to the finished floor should the top of the flange be positioned?

Accepted Answer

Flush with or up to 1/4 inch above the finished floor

Answer

1/4 inch below the finished floor

Answer

1 inch above the finished floor

Answer

It does not matter as long as the wax ring seals

Question 2

What type of supply connection is required between a gas water heater and the gas supply line to allow for vibration and movement?

Accepted Answer

CSST flexible gas connector

Answer

Rigid black iron pipe

Answer

PVC tubing

Answer

Copper compression fitting

Question 3

When installing a pedestal sink, what must be done to properly support its weight?

Accepted Answer

Anchor the basin to a wall-mounted blocking or carrier

Answer

Attach it only to the pedestal base

Answer

Rest it on the floor only

Answer

Glue it to the wall with construction adhesive

Question 4

What is the purpose of the pressure-temperature (P&T) relief valve on a water heater?

Accepted Answer

To prevent the tank from over-pressurizing or overheating to dangerous levels

Answer

To regulate incoming water pressure

Answer

To balance hot and cold water temperatures

Answer

To measure the water temperature at the fixture

Question 5

When connecting a dishwasher drain hose, what installation technique prevents wastewater from siphoning back into the dishwasher?

Accepted Answer

Creating a high loop or installing an air gap at the counter

Answer

Installing a check valve at the dishwasher pump

Answer

Using a larger-diameter drain hose

Answer

Connecting the drain directly to the P-trap

Question 6

What is the standard rough-in height for a wall-hung lavatory supply stop valve from the finished floor?

Accepted Answer

21 inches

Answer

12 inches

Answer

24 inches

Answer

36 inches