Plumbing Materials: Types, Properties, and Applications

Question 1

Which of the following is NOT an advantage of copper in plumbing systems?

Accepted Answer

Lower cost

Answer

Corrosion resistance

Answer

Durability

Answer

Malleability

Question 2

Which type of plastic pipe is known for its flexibility and ease of bending?

Accepted Answer

PEX

Answer

PVC

Answer

CPVC

Answer

ABS

Question 3

What is the primary purpose of a primer in plumbing PVC installations?

Accepted Answer

To enhance adhesion

Answer

To clean the surface

Answer

To prevent leaks

Answer

To increase flexibility

Question 4

Which type of fitting is used to connect two pipes at a right angle?

Accepted Answer

Elbow

Answer

Tee

Answer

Cross

Answer

Coupling

Question 5

What is the main purpose of a trap in a plumbing system?

Accepted Answer

To prevent sewer gases from entering the building

Answer

To collect and drain waste water

Answer

To regulate water flow

Answer

To filter out debris

Question 6

Which of the following is a type of drainpipe that is typically used for sinks and showers?

Accepted Answer

Waste pipe

Answer

Vent pipe

Answer

Soil pipe

Answer

Leader pipe

Question 7

What is the primary advantage of using cross-linked polyethylene (PEX) pipes?

Accepted Answer

Flexibility

Answer

Resistance to high temperatures

Answer

Corrosion resistance

Answer

Low cost

Question 8

What is the purpose of using a reducing tee in a plumbing system?

Accepted Answer

To connect two pipes of different diameters

Answer

To alter the direction of water flow

Answer

To isolate a section of pipe

Answer

To regulate water pressure

Question 9

Which type of valve is used to control the flow of water in a single direction, preventing reversal of flow?

Accepted Answer

Check valve

Answer

Ball valve

Answer

Gate valve

Answer

Butterfly valve

Question 10

Which material is typically used to manufacture brass fittings?

Accepted Answer

Copper and zinc

Answer

Copper and tin

Answer

Brass and aluminum

Answer

Brass and iron

Question 11

Which type of pipe is commonly used for underground water supply lines due to its durability and resistance to corrosion?

Accepted Answer

Cast iron

Answer

Copper

Answer

PVC

Answer

PEX

Question 12

What is the primary reason for using color-coded pipes in plumbing systems?

Accepted Answer

To clearly indicate the type of fluid being transported

Answer

To enhance the aesthetic appeal

Answer

To simplify the process of troubleshooting

Answer

To adhere to established building codes

Question 13

Which of the following materials is NOT commonly used in plumbing systems?

Accepted Answer

Concrete

Answer

Copper

Answer

PVC

Answer

Galvanized steel

Question 14

What is the primary function of a gate valve?

Accepted Answer

Shutting off water flow

Answer

Regulating water flow

Answer

Preventing backflow

Answer

Releasing air from the system

Question 15

Which joint type is used to connect CPVC pipes?

Accepted Answer

Solvent weld

Answer

Threaded

Answer

Compression

Answer

Flare

Question 16

Which of the following materials is NOT commonly used in plumbing pipes?

Accepted Answer

Aluminum

Answer

Copper

Answer

Brass

Answer

Polyvinyl chloride (PVC)

Question 17

Which type of pipe is most suitable for hot water supply lines?

Accepted Answer

CPVC

Answer

PEX

Answer

Galvanized steel

Answer

Cast iron

Question 18

What is the main advantage of using PEX tubing in plumbing systems?

Accepted Answer

Flexibility and ease of installation

Answer

Corrosion resistance

Answer

Low cost

Answer

High strength

Question 19

Which type of fitting is used to connect pipes of different diameters or types?

Accepted Answer

Reducer

Answer

Tee

Answer

Elbow

Answer

Union

Question 20

What is the function of a gate valve in a plumbing system?

Accepted Answer

To isolate a section of pipe for maintenance or repairs

Answer

To regulate water flow

Answer

To prevent backflow

Answer

To drain water from a fixture

Question 21

Which of the following codes governs the installation of plumbing systems in the United States?

Accepted Answer

Uniform Plumbing Code (UPC)

Answer

International Building Code (IBC)

Answer

International Residential Code (IRC)

Answer

National Electrical Code (NEC)

Question 22

Which type of fitting is used to connect two pipes of different diameters?

Accepted Answer

Reducer

Answer

Coupling

Answer

Elbow

Question 23

What is the function of a check valve in a plumbing system?

Accepted Answer

To prevent backflow

Answer

To regulate water pressure

Answer

To mix hot and cold water

Question 24

What is the purpose of flux in plumbing?

Accepted Answer

To remove oxides from metal surfaces

Answer

To lubricate fittings

Answer

To prevent corrosion

Answer

To seal leaks

Question 25

Which of the following is a disadvantage of using cast iron pipes?

Accepted Answer

Susceptibility to corrosion

Answer

Low cost

Answer

Long lifespan

Answer

Easy to install

Question 26

What is the purpose of a union in a plumbing system?

Accepted Answer

To allow for easy disassembly and reassembly

Answer

To reduce pressure

Answer

To change the direction of water flow

Answer

To control water volume