Plumbing Fixtures and Materials: Selection and Installation

Question 1

Which of the following is NOT considered a plumbing fixture?

Accepted Answer

Cabinets

Answer

Sinks

Answer

Baths

Answer

Toilets

Question 2

Which of the following is NOT a type of plumbing fitting?

Accepted Answer

Bolt

Answer

Elbow

Answer

Tee

Answer

Valve

Question 3

Which of the following materials is commonly used for both hot and cold water supply piping in residential buildings?

Accepted Answer

Copper

Answer

Galvanized steel

Answer

Polyvinyl chloride (PVC)

Answer

Cast iron

Question 4

The primary purpose of a P-trap in a plumbing system is to:

Accepted Answer

Prevent foul odors from entering the building

Answer

Allow for thermal expansion of the waste line

Answer

Collect and remove debris from the waste stream

Answer

Regulate the flow of water in the drain

Question 5

Which type of valve is most suitable for controlling the flow of water to a bathtub faucet?

Accepted Answer

Ball valve

Answer

Gate valve

Answer

Globe valve

Answer

Check valve

Question 6

The main function of a vent stack in a plumbing system is to:

Accepted Answer

Remove sewer gases from the system

Answer

Provide air circulation to prevent clogs

Answer

Prevent backflow of water into fixtures

Answer

Regulate water pressure

Question 7

Which type of pipe material is known for its flexibility and is commonly used in water supply lines due to this property?

Accepted Answer

PEX

Answer

Copper

Answer

PVC

Answer

CPVC

Question 8

Which of the following tools is specifically designed for measuring and cutting copper pipes accurately?

Accepted Answer

Tubing cutter

Answer

Pipe wrench

Answer

Adjustable wrench

Answer

Hacksaw

Question 9

What is the main function of a backflow preventer in a plumbing system?

Accepted Answer

To prevent contamination of the potable water supply

Answer

To reduce water pressure

Answer

To prevent water leaks

Answer

To regulate water temperature

Question 10

Which type of plumbing fitting is used to change the direction of a pipe run by 90 degrees?

Accepted Answer

Elbow

Answer

Tee

Answer

Cross

Answer

Union

Question 11

According to code requirements, what is the recommended size for a water pipe supplying a washing machine?

Accepted Answer

3/4 inch

Answer

1/2 inch

Answer

1 inch

Answer

1 1/2 inches

Question 12

In residential buildings, which drainage system is typically used?

Accepted Answer

Sanitary drainage system

Answer

Storm drainage system

Answer

Combined drainage system

Answer

French drain

Question 13

Which of the following is NOT considered a common plumbing fixture?

Accepted Answer

Electrical outlets

Answer

Sinks

Answer

Toilets

Answer

Showers

Question 14

When installing a toilet, which type of sealant is typically used to create a watertight seal between the base of the toilet and the floor?

Accepted Answer

Caulk

Answer

Putty

Answer

Cement

Answer

Epoxy

Question 15

To ensure a toilet fits correctly when installed in a bathroom vanity, which measurement is essential?

Accepted Answer

Distance from the wall to the center of the drain

Answer

Width of the toilet's tank

Answer

Height of the toilet bowl

Question 16

When selecting a material for plumbing in a humid environment, which factor is crucial to consider?

Accepted Answer

Corrosion resistance

Answer

Tensile strength

Answer

Cost

Answer

Ease of installation

Question 17

In a high-pressure water line, which valve type offers precise flow regulation?

Accepted Answer

Globe Valve

Answer

Gate Valve

Answer

Ball Valve

Answer

Check Valve

Question 18

What is the main job of a vent pipe in a plumbing system?

Accepted Answer

To stop sewer gas from building up

Answer

To bring water to sinks and toilets

Answer

To remove wastewater

Question 19

Which of the following materials is **NOT** commonly used for drain, waste, and vent (DWV) piping in residential plumbing?

Accepted Answer

Copper

Answer

Cast Iron

Answer

PVC

Answer

ABS

Question 20

When installing a water closet (toilet), accurate rough-in measurements are crucial. What characteristic best describes these measurements?

Accepted Answer

Precise

Answer

Estimated

Answer

Random

Answer

Flexible

Question 21

Which of the following plumbing fixtures typically requires a backflow preventer to prevent contamination of the potable water supply?

Accepted Answer

Outdoor hose bib (faucet)

Answer

Toilet

Answer

Bathtub

Answer

Sink

Question 22

When choosing a sink faucet, which of the following is a significant factor to consider for efficient water usage?

Accepted Answer

Flow rate

Answer

Color

Answer

Material

Answer

Shape

Question 23

Which tool is specifically designed for accurately cutting and shaping copper tubing?

Accepted Answer

Tubing cutter

Answer

Pliers

Answer

Hacksaw

Answer

Pipe wrench

Question 24

When installing a bathtub drain, how should the drainpipe be sloped?

Accepted Answer

Sloped towards the drain

Answer

Sloped downwards but not directly towards the drain

Answer

Sloped away from the drain

Answer

Left level