Residential Plumbing Systems: Master the Basics of Home Plumbing

Question 1

The main purpose of a water heater in a residential plumbing system is to:

Accepted Answer

Provide hot water for fixtures and appliances

Answer

Regulate hot water temperature

Answer

Soften hard water

Answer

Circulate hot water throughout the home

Question 2

For connecting two pipes of different sizes, which fitting would be appropriate?

Accepted Answer

Reducer

Answer

Elbow

Answer

Union

Answer

Tee

Question 3

In a residential drainage system, the most commonly used material for pipes is:

Accepted Answer

Polyvinyl chloride (PVC)

Answer

Copper

Answer

Cast iron

Answer

Galvanized steel

Question 4

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

Accepted Answer

To prevent sewer gases from entering the building

Answer

To regulate water flow

Answer

To collect debris

Answer

To connect fixtures to the main drain line

Question 5

To secure horizontal pipes in a plumbing system, which type of support is typically used?

Accepted Answer

Pipe hangers

Answer

Pipe straps

Answer

Pipe clamps

Answer

Pipe saddles

Question 6

What is the primary role of flux in the soldering process?

Accepted Answer

To clean metal surfaces and promote bonding

Answer

To provide additional strength to the joint

Answer

To protect against corrosion

Answer

To lubricate the joint

Question 7

In a plumbing system, what is the primary function of a backflow preventer?

Accepted Answer

To prevent water from flowing backward into the water supply

Answer

To reduce water pressure

Answer

To trap sediment

Answer

To regulate the flow of water

Question 8

In designing residential plumbing systems, which principle is of utmost importance?

Accepted Answer

Optimizing system efficiency

Answer

Minimizing water flow

Answer

Maximizing pressure loss

Answer

Using the smallest possible pipe diameters

Question 9

Which type of pipe is most commonly used for water supply lines in residential plumbing systems in the United States?

Accepted Answer

Copper

Answer

Galvanized steel

Answer

Cast iron

Answer

PVC

Question 10

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

Accepted Answer

Elbow

Answer

Tee

Answer

Union

Answer

Coupling

Question 11

Which tool is specifically designed for cutting and shaping copper pipes in plumbing systems?

Accepted Answer

Tube cutter

Answer

Hacksaw

Answer

Pliers

Answer

Wire strippers

Question 12

What is the main function of a pressure reducing valve (PRV) in a plumbing system?

Accepted Answer

To decrease water pressure

Answer

To increase water pressure

Answer

To regulate water temperature

Answer

To prevent leaks

Question 13

Which type of solder is recommended for plumbing applications in the United States?

Accepted Answer

Lead-free solder

Answer

Acid-core solder

Answer

Rosin-core solder

Answer

Silver solder

Question 14

In a residential water supply system, what is the main reason for using a pressure-reducing valve?

Accepted Answer

To protect plumbing fixtures and appliances from high water pressure.

Answer

To regulate the flow of hot water in the system.

Answer

To prevent freezing in outdoor pipes during cold weather.

Answer

To reduce noise and water hammer in pipes.

Question 15

In plumbing, which tool is commonly used to diagnose and clear clogs in drain lines?

Accepted Answer

Drain snake

Answer

Pressure gauge

Answer

Multimeter

Question 16

What's the main reason for regularly checking and maintaining home plumbing systems?

Accepted Answer

To prevent expensive repairs and emergencies

Answer

To make sure they meet building codes

Answer

To make the plumbing system look better

Question 17

Which type of pipe joint is created using solder?

Accepted Answer

Sweat joint

Answer

Flare joint

Answer

Threaded joint

Answer

Compression joint

Question 18

Which of the following is considered a fixture in a residential plumbing system?

Accepted Answer

Faucet

Answer

Valve

Answer

Pipe

Answer

Fitting

Question 19

What is the main function of a water heater expansion tank?

Accepted Answer

To absorb pressure increases caused by thermal expansion

Answer

To store hot water

Answer

To prevent sediment buildup

Question 20

What is the primary goal of a well-designed plumbing system?

Accepted Answer

To provide a safe and reliable supply of water and dispose of waste

Answer

To enhance the aesthetic appearance of a building

Answer

To regulate the temperature of a building

Question 21

What type of pipe material is commonly used for water supply lines in residential plumbing systems in the United States?

Accepted Answer

Copper

Answer

Cast iron

Answer

PVC

Answer

Galvanized steel

Question 22

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

Accepted Answer

To prevent sewer gases from entering the building

Answer

To regulate the flow of water

Answer

To filter out debris from the water

Answer

To store water for future use

Question 23

What type of fitting is used to join two pipe sections at a 90-degree angle?

Accepted Answer

Elbow

Answer

Union

Answer

Cross

Answer

Tee

Question 24

Which material is generally the most suitable for underground drainage piping in residential plumbing systems?

Accepted Answer

PVC

Answer

Cast iron

Answer

Copper

Answer

Galvanized steel

Question 25

Which of the following is a safety precaution that should be taken when working with natural gas piping?

Accepted Answer

Use a gas leak detector

Answer

Use a smoke detector

Answer

Use a carbon monoxide detector

Answer

Use a water leak detector

Question 26

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

Accepted Answer

To release excess pressure from the water heater

Answer

To allow water to flow into the water heater

Answer

To drain the water heater

Answer

To prevent water from freezing in the water heater