Types of Plumbing Systems: A Comprehensive Guide for Plumbing Professionals

Question 1

What's the main reason vent stacks are used in plumbing systems?

Accepted Answer

To let air in and stop siphoning

Answer

To drain wastewater

Answer

To supply water

Answer

To prevent sewage backflow

Question 2

Which of the following is a common type of water supply system found in residential buildings?

Accepted Answer

Gravity-fed water supply system

Answer

Rainwater harvesting system

Answer

Hydronic heating system

Answer

Direct potable reuse system

Question 3

What is the primary function of a sanitary sewer system?

Accepted Answer

To collect and convey wastewater to a treatment facility

Answer

To regulate the flow of water pressure in a water supply system

Answer

To vent gases from plumbing fixtures

Answer

To provide potable water to buildings

Question 4

In a residential building, which material is commonly used for drainage pipes?

Accepted Answer

CPVC

Answer

Copper

Answer

Galvanized steel

Answer

Cast iron

Question 5

What is the purpose of a P-trap in a plumbing system?

Accepted Answer

To create a water seal to prevent sewer gases from entering a building

Answer

To prevent backflow of water

Answer

To regulate the flow of water pressure in a water supply system

Answer

To provide a cleanout point for access to the drainage system

Question 6

Which of the following is a common plumbing fixture installed in a bathroom?

Accepted Answer

Lavatory

Answer

Refrigerator

Answer

Water heater

Answer

Garbage disposal

Question 7

In a toilet tank, what is the purpose of a ballcock?

Accepted Answer

To regulate the flow of water into the tank

Answer

To create a seal between the tank and the bowl

Answer

To prevent water from overflowing the tank

Answer

To flush the toilet bowl

Question 8

What is the main reason for using a vent system in plumbing?

Accepted Answer

To prevent gases and odors from flowing back

Answer

To supply water to fixtures

Answer

To drain waste and wastewater

Answer

To boost water pressure

Question 9

Which component of a water supply system heats water for use in fixtures?

Accepted Answer

Water heater

Answer

Water softener

Answer

Pressure-reducing valve

Answer

Backflow preventer

Question 10

What is the primary function of a P-trap?

Accepted Answer

To prevent sewer gases from entering the building

Answer

To collect solid waste from drains

Answer

To regulate the flow of water through pipes

Answer

To connect different types of pipes

Question 11

Which type of vent system utilizes a vertical pipe called a stack vent for air circulation?

Accepted Answer

Dry vent system

Answer

Wet vent system

Answer

Individual vent system

Answer

Loop vent system

Question 12

Which fitting is commonly used to change the direction of a pipe at a 90-degree angle?

Accepted Answer

Elbow

Answer

Tee

Answer

Coupling

Answer

Reducer

Question 13

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

Accepted Answer

To reduce water pressure to a safe level for fixtures

Answer

To increase water pressure for improved flow rate

Answer

To regulate water temperature

Answer

To meter water usage

Question 14

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

Accepted Answer

To prevent contaminated water from flowing back into the water supply

Answer

To reduce the pressure of water entering the building

Answer

To regulate the flow of water through fixtures

Answer

To isolate sections of the plumbing system

Question 15

Which material is typically used for drain pipes in residential plumbing systems?

Accepted Answer

PVC

Answer

Copper

Answer

PEX

Answer

Galvanized steel

Question 16

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

Accepted Answer

Electrical system

Answer

Water supply system

Answer

Drainage system

Answer

Vent system

Question 17

What is the primary purpose of a drainage system?

Accepted Answer

To remove wastewater from a building

Answer

To provide drinking water to a building

Answer

To vent gases from a building

Answer

To protect a building from electrical hazards

Question 18

Which of the following is a component of a vent system?

Accepted Answer

Vent stack

Answer

Drain pipe

Answer

Trap

Answer

Water heater

Question 19

What is the difference between a sanitary drain and a storm drain?

Accepted Answer

Sanitary drains carry wastewater, while storm drains carry rainwater.

Answer

Storm drains carry wastewater, while sanitary drains carry rainwater.

Answer

Sanitary drains and storm drains carry both wastewater and rainwater.

Answer

There is no difference between sanitary drains and storm drains.

Question 20

What is the purpose of a backflow preventer?

Accepted Answer

To prevent contaminated water from flowing back into the water supply

Answer

To increase the water pressure in a plumbing system

Answer

To reduce the noise from a running toilet

Answer

To protect a water heater from overheating

Question 21

What is the difference between a hot water heater and a cold water heater?

Accepted Answer

Hot water heaters heat water, while cold water heaters cool water.

Answer

Cold water heaters heat water, while hot water heaters cool water.

Answer

Hot water heaters and cold water heaters do the same thing.

Answer

There is no difference between hot water heaters and cold water heaters.

Question 22

What is the purpose of a pressure-reducing valve?

Accepted Answer

To reduce the water pressure in a plumbing system

Answer

To increase the water pressure in a plumbing system

Answer

To prevent water leaks

Answer

To protect a water heater from overheating