Plumbing Materials and Fittings: Master the Basics for Plumbing Success

Question 1

In residential buildings, which type of pipe is commonly used to distribute drinking water?

Accepted Answer

Copper pipe

Answer

Cast iron pipe

Answer

Galvanized steel pipe

Question 2

In drainage systems, which type of pipe is most commonly used?

Accepted Answer

PVC

Answer

Copper

Answer

Galvanized Steel

Answer

Cast Iron

Question 3

What is the primary purpose of a tee fitting?

Accepted Answer

Connect three pipes at a 90-degree angle

Answer

Connect two pipes at a 45-degree angle

Answer

Reduce the diameter of a pipe

Answer

Change the direction of a pipe

Question 4

Which material offers the highest resistance to corrosion in plumbing applications?

Accepted Answer

Copper

Answer

PVC

Answer

Galvanized Steel

Answer

Cast Iron

Question 5

Which type of joint provides the most secure connection in plumbing systems?

Accepted Answer

Soldered joint

Answer

Slip joint

Answer

Compression joint

Answer

Threaded joint

Question 6

Which fitting is used to connect pipes of different diameters in a plumbing system?

Accepted Answer

Reducer

Answer

Coupling

Answer

Elbow

Answer

Tee

Question 7

In residential plumbing, which flexible pipe type is commonly used to distribute hot and cold water?

Accepted Answer

PEX pipe

Answer

Cast iron pipe

Answer

Copper pipe

Question 8

Which of the following pipe materials is known for its flexibility, resistance to corrosion, and ability to withstand high temperatures?

Accepted Answer

Corrugated stainless steel

Answer

Cast iron

Answer

Galvanized steel

Answer

PVC

Question 9

What is the primary function of a reducing fitting in a plumbing system?

Accepted Answer

To connect pipes of different diameters, allowing for a gradual transition in size.

Answer

To change the direction of a pipe

Answer

To seal leaks in pipes

Question 10

What is the main purpose of a rubber gasket in a plumbing system?

Accepted Answer

To create a watertight seal at joints and prevent leakage.

Answer

To reinforce pipe connections

Answer

To regulate water pressure

Question 11

Which of the following materials is NOT typically used for drainage piping due to its susceptibility to corrosion?

Accepted Answer

Copper

Answer

ABS

Answer

PVC

Answer

Cast iron

Question 12

What is the key difference between a slip joint nut and a compression nut?

Accepted Answer

A slip joint nut slides over the pipe and tightens with a gasket, while a compression nut compresses the pipe to create a seal.

Answer

A slip joint nut is used for metal pipes, while a compression nut is used for plastic pipes.

Question 13

What is the primary function of a trap in a plumbing system?

Accepted Answer

To prevent sewer gases and odors from entering the building by creating a water seal.

Answer

To connect different types of pipes

Answer

To increase water pressure

Question 14

Which type of material is widely used for water supply piping due to its durability, resistance to corrosion, and ability to withstand high temperatures?

Accepted Answer

Copper

Answer

PVC

Answer

ABS

Answer

Cast iron

Question 15

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

Accepted Answer

To facilitate the quick and easy removal and re-installation of fixtures or appliances, allowing for maintenance or repairs.

Answer

To seal leaks in pipes

Answer

To regulate water flow

Question 16

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

Accepted Answer

Conduit

Answer

Copper

Answer

PVC

Question 17

What type of fitting is used to connect two pipes at a 90-degree angle?

Accepted Answer

Elbow

Answer

Cross

Answer

Union

Answer

Tee

Question 18

Which type of valve effectively stops the flow of water in a plumbing system?

Accepted Answer

Gate valve

Answer

Check valve

Answer

Ball valve

Answer

Pressure-reducing valve

Question 19

Which material is primarily utilized for creating seals in plumbing systems?

Accepted Answer

Rubber

Answer

Metal

Answer

Plastic

Answer

Ceramic

Question 20

What material forms the basis of PEX pipes?

Accepted Answer

Cross-linked polyethylene

Answer

Polyvinyl chloride

Answer

Polypropylene

Answer

Copper

Question 21

Which feature is NOT an advantage of using PVC pipes?

Accepted Answer

Fire resistance

Answer

Ease of installation

Answer

Low cost

Answer

Corrosion resistance

Question 22

Which type of seal is commonly applied to threaded connections to prevent leaks?

Accepted Answer

Teflon tape

Answer

O-ring

Answer

Gasket

Answer

Caulk

Question 23

Which type of pipe is generally preferred for hot and cold water distribution in residential plumbing systems due to its durability and corrosion resistance?

Accepted Answer

Copper

Answer

PVC

Answer

ABS

Answer

Galvanized steel

Question 24

Which plumbing fitting is designed to connect two pipes running in perpendicular directions?

Accepted Answer

Elbow

Answer

Cap

Answer

Tee

Answer

Union

Question 25

Which type of valve is commonly used in plumbing systems to control the flow of water by sliding a gate across the pipe?

Accepted Answer

Gate valve

Answer

Ball valve

Answer

Check valve

Answer

Pressure relief valve

Question 26

What is the primary purpose of a trap in a plumbing fixture?

Accepted Answer

To prevent the escape of sewer gases into the building

Answer

To regulate the flow of water

Answer

To provide support for the fixture

Answer

To connect the fixture to the drain

Question 27

Which material is commonly used for seals and gaskets in plumbing systems due to its flexibility and ability to form a watertight seal?

Accepted Answer

Rubber

Answer

Plastic

Answer

Metal

Answer

Ceramic

Question 28

What is the main advantage of using CPVC pipes over PVC pipes in plumbing systems?

Accepted Answer

Higher temperature tolerance

Answer

Lower cost

Answer

Improved durability

Answer

Greater flexibility

Question 29

Which type of pipe is commonly used for underground drainage applications due to its strength and resistance to corrosion?

Accepted Answer

Cast iron

Answer

Copper

Answer

ABS

Answer

PVC

Question 30

What is the primary function of a pressure relief valve in a plumbing system?

Accepted Answer

To release excess water pressure to prevent damage to the system

Answer

To prevent backflow

Answer

To control water flow

Answer

To provide access for maintenance

Question 31

Which type of fitting is used to connect a branch line to a main drain line, allowing for future access if needed?

Accepted Answer

Saddle tee

Answer

Cap

Answer

Elbow

Answer

Union

Question 32

What is the primary benefit of using a union in a plumbing system?

Accepted Answer

To facilitate easy disassembly and reassembly for maintenance or repairs

Answer

To prevent leaks

Answer

To connect pipes of different diameters

Answer

To regulate water flow

Question 33

Which type of pipe is known for its flexibility and chemical resistance, making it suitable for both hot and cold water lines?

Accepted Answer

CPVC

Answer

Galvanized steel

Answer

Cast iron

Question 34

What type of fitting is specifically designed to connect two pipes at a right angle, forming a 90-degree bend?

Accepted Answer

Elbow

Answer

Union

Answer

Tee

Answer

Coupling

Question 35

What is the primary purpose of a valve in a plumbing system?

Accepted Answer

To regulate or control the flow of water through a pipe or fixture

Answer

To regulate water pressure

Answer

To prevent leaks

Answer

To connect pipes

Question 36

In the process of soldering copper pipes, what is the main function of flux?

Accepted Answer

To clean and prepare the pipe surfaces by removing oxidation, ensuring a stronger and more reliable joint

Answer

To increase the strength of the joint

Answer

To bond the metal together

Answer

To reduce corrosion

Question 37

What is the primary advantage of using galvanized fittings over regular steel fittings in plumbing systems?

Accepted Answer

Enhanced corrosion resistance due to the protective zinc coating, extending the lifespan and durability of the fittings

Answer

Easier installation process

Answer

Higher overall strength

Answer

Lower cost

Question 38

Identify the type of joint that allows for the connection of a pipe to a fixture without the need for any type of sealant or adhesive, relying solely on mechanical compression to create a watertight seal.

Accepted Answer

Compression joint

Answer

Threaded joint

Answer

Flare joint

Answer

Sweat joint

Question 39

When assembling threaded fittings in a plumbing system, what is the primary purpose of using a thread sealant?

Accepted Answer

To prevent leaks by filling the gaps between threads and sealing the joint, ensuring a watertight connection

Answer

To facilitate easier assembly

Answer

To improve the overall strength of the joint

Answer

To prevent corrosion

Question 40

Which type of fitting is specifically designed to divide a pipe into two separate branches, allowing water to flow in different directions?

Accepted Answer

Tee

Answer

Coupling

Answer

Union

Answer

Elbow

Question 41

Which type of pipe is typically used for drainage in residential dwellings?

Accepted Answer

PVC (Polyvinyl Chloride)

Answer

Galvanized Steel

Answer

ABS (Acrylonitrile-Butadiene-Styrene)

Answer

Copper

Question 42

The primary purpose of a gate valve in plumbing is to:

Accepted Answer

Completely stop or allow the flow of liquid.

Answer

Release trapped air from the system.

Answer

Regulate the volume or rate of flow.

Answer

Change the flow direction.

Question 43

In a plumbing system, what is the main purpose of a trap?

Accepted Answer

To prevent sewer gases from entering the building.

Answer

To collect sediment and other debris.

Answer

To prevent backflow of waste into the fixture.

Answer

To control the flow of water.

Question 44

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

Accepted Answer

Elbow

Answer

Cross

Answer

Tee

Answer

Union

Question 45

In plumbing systems, unions are primarily used to:

Accepted Answer

Connect two pipes that may need to be disconnected for maintenance or repairs.

Answer

Reduce water pressure.

Answer

Seal leaks in pipes.

Answer

Change the direction of flow.

Question 46

When selecting a sealant for plumbing applications, what is the most crucial factor to consider?

Accepted Answer

Compatibility with the materials and intended use.

Answer

Brand reputation.

Answer

Cost.

Answer

Ease of application.

Question 47

Which of these pipe materials is frequently used for water supply lines due to its durability and corrosion resistance?

Accepted Answer

Copper

Answer

Cast Iron

Answer

ABS

Answer

PVC

Question 48

In a plumbing system, the primary function of a union fitting is to:

Accepted Answer

Allow for convenient disconnection and reconnection of pipes.

Answer

Change the direction of pipes.

Answer

Reduce the diameter of pipes.

Question 49

In plumbing, which type of valve is typically used to control water flow to a fixture?

Accepted Answer

Ball Valve

Answer

Check Valve

Answer

Gate Valve

Answer

Globe Valve

Question 50

What is the primary function of a pressure relief valve in a water heater?

Accepted Answer

To prevent excessive pressure buildup within the tank.

Answer

To control the flow of water into the heater.

Answer

To prevent backflow of water.

Answer

To regulate the water temperature.

Question 51

When selecting a sealant for a plumbing joint, what is the most important factor to consider?

Accepted Answer

Compatibility with the materials being joined.

Answer

Ease of application.

Answer

Price of the sealant.

Answer

Color of the sealant.

Question 52

A plumber needs to install a pipe in a tight space where it needs to bend. Which type of pipe is most suitable for this application?

Accepted Answer

PEX

Answer

Copper

Answer

PVC

Answer

Cast Iron

Question 53

Which type of fitting is used to join two pipes at a 90-degree angle?

Accepted Answer

Elbow

Answer

Coupling

Answer

Union

Answer

Tee

Question 54

What is the primary purpose of a check valve in a plumbing system?

Accepted Answer

To prevent backflow of water.

Answer

To control the flow rate of water.

Answer

To regulate water pressure.

Answer

To change the direction of water flow.

Question 55

What is the purpose of a pipe support in a plumbing system?

Accepted Answer

To prevent sagging and provide stability for the pipe.

Answer

To reduce water pressure.

Answer

To control the flow rate of water.