Water Fixtures and Appliances: Types, Installation, and Maintenance

Question 1

Which type of faucet is most frequently utilized in residential kitchen settings?

Accepted Answer

Single-handle mixer

Answer

Two-handle mixer

Answer

Pull-out faucet

Answer

Touchless faucet

Question 2

What is the function of an expansion tank in a water heater?

Accepted Answer

To absorb thermal expansion of water

Answer

To store excess hot water

Answer

To prevent the water heater from overheating

Answer

To reduce water pressure in the plumbing system

Question 3

Which tool is used to measure and cut copper pipe?

Accepted Answer

Tubing cutter

Answer

Hack saw

Answer

Pipe wrench

Answer

Soldering iron

Question 4

According to safety guidelines, what is the recommended maximum temperature for a residential water heater?

Accepted Answer

140°F

Answer

120°F

Answer

160°F

Answer

180°F

Question 5

What is the purpose of a vent stack in a plumbing system?

Accepted Answer

To release sewer gases to the outside

Answer

To provide fresh air to the drain system

Answer

To prevent backflow of wastewater

Answer

To reduce water pressure in the system

Question 6

Which type of compression fitting is commonly used in plumbing systems due to its ease of installation?

Accepted Answer

SharkBite

Answer

PEX

Answer

CPVC

Answer

ABS

Question 7

What is the primary function of a flapper valve in a toilet?

Accepted Answer

To prevent water from leaking out of the tank

Answer

To regulate the flow of water into the tank

Answer

To flush the toilet bowl

Answer

To regulate the water temperature in the tank

Question 8

Which of the following is NOT a type of water heater commonly used in residential homes?

Accepted Answer

Gravity-fed

Answer

Tankless

Answer

Solar

Answer

Heat pump

Question 9

Which of the following materials is commonly used for plumbing pipes in residential construction due to its flexibility and durability?

Accepted Answer

Polyethylene (PEX)

Answer

Copper

Answer

Polyvinyl chloride (PVC)

Answer

Galvanized steel

Question 10

What is the purpose of the National Plumbing Code (NPC)?

Accepted Answer

To establish minimum standards for plumbing installation and maintenance

Answer

To provide a certification program for plumbers

Answer

To promote research and development in plumbing

Answer

To regulate the pricing of plumbing services

Question 11

Which tool is specifically designed to bend copper tubing without kinking or damaging it?

Accepted Answer

Pipe bender

Answer

Hack saw

Answer

Adjustable wrench

Answer

Plumber's putty

Question 12

What is the primary function of a vent stack in a plumbing system?

Accepted Answer

To allow air to enter the system and prevent pressure buildup

Answer

To drain excess water from the system

Answer

To clean the pipes by flushing water through them

Answer

To prevent backflow of water into the water supply

Question 13

What is the recommended method for turning off the water supply to a specific fixture?

Accepted Answer

Close the valve under the fixture that needs to be repaired

Answer

Turn off the main water valve

Answer

Remove the aerator from the faucet

Answer

Turn on the hot water side only

Question 14

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

Accepted Answer

To prevent sewer gases from entering the building

Answer

To collect debris and prevent clogs

Answer

To regulate water pressure

Answer

To provide a point of access for cleaning

Question 15

Which tool is used to measure the water pressure in a plumbing system?

Accepted Answer

Pressure gauge

Answer

Voltmeter

Answer

Multimeter

Answer

Manometer

Question 16

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

Accepted Answer

To isolate a fixture or appliance from the water supply for maintenance or repairs

Answer

To regulate the flow of water to a specific fixture or appliance

Answer

To prevent backflow of water into the main water supply

Answer

To provide access for cleaning or inspection

Question 17

Which type of pipe fitting is used to change the direction of a pipe in a plumbing system?

Accepted Answer

Elbow

Answer

Tee

Answer

Reducer

Answer

Union

Question 18

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

Accepted Answer

To maintain a consistent water pressure to fixtures and appliances, despite changes in incoming water pressure.

Answer

To increase water pressure to fixtures and appliances.

Answer

To prevent water hammer caused by sudden changes in water flow.

Answer

To drain water from the plumbing system during repairs or maintenance.

Question 19

Which faucet type features a single lever that controls both water temperature and flow?

Accepted Answer

Cartridge faucet

Answer

Ballcock faucet

Answer

Compression faucet

Answer

Disc faucet

Question 20

What is the main purpose of a water heater?

Accepted Answer

Heating water for bathing and sanitation

Answer

Providing hot water for appliances

Answer

Maintaining water pressure

Answer

Filtering water impurities

Question 21

What role does a trap play in a plumbing fixture?

Accepted Answer

Preventing sewer gas backflow

Answer

Storing water for flushing

Answer

Regulating water flow

Answer

Filtering out solid waste

Question 22

To ensure proper drainage, what is the recommended slope for drain pipes?

Accepted Answer

1/4 inch per foot

Answer

1/2 inch per foot

Answer

1 inch per foot

Answer

2 inches per foot

Question 23

Which type of pipe is most suitable for venting a water heater?

Accepted Answer

B-vent pipe

Answer

CPVC pipe

Answer

ABS pipe

Answer

PVC pipe

Question 24

What is the primary purpose of a supply stop in a plumbing system?

Accepted Answer

To control the flow of water to a fixture

Answer

To prevent water leakage from a fixture

Answer

To regulate water pressure

Answer

To provide hot water to a fixture

Question 25

Which type of toilet utilizes a flushing system that relies on gravity?

Accepted Answer

Gravity flush toilet

Answer

Pressure-assist toilet

Answer

Dual-flush toilet

Answer

Composting toilet

Question 26

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

Accepted Answer

To prevent water from flowing in an undesired direction

Answer

To regulate water pressure

Answer

To filter water

Answer

To prevent freezing of pipes

Question 27

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

Accepted Answer

To prevent sewer gases from entering the building

Answer

To prevent water from leaking out of the drain

Answer

To catch and hold debris

Answer

To regulate water flow

Question 28

In residential buildings, which toilet type is most effective in reducing water consumption?

Accepted Answer

Dual-flush toilet

Answer

Gravity-flush toilet

Answer

Pressure-assist toilet

Answer

Composting toilet

Question 29

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

Accepted Answer

To prevent backflow of water

Answer

To regulate water pressure

Answer

To provide air circulation

Question 30

Which type of toilet is designed to use minimal amounts of water?

Accepted Answer

Dual-flush toilet

Answer

Pressure-assisted toilet

Answer

Gravity-flush toilet

Question 31

What is the primary purpose of a water heater in a plumbing system?

Accepted Answer

To heat water for domestic use

Answer

To filter impurities from water

Answer

To circulate water throughout the system

Answer

To regulate water pressure

Question 32

Which safety feature is typically found on water heaters?

Accepted Answer

Temperature relief valve

Answer

Drain valve

Answer

Flow restrictor

Answer

Pressure gauge

Question 33

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

Accepted Answer

Tubing cutter

Answer

Hacksaw

Answer

Pipe wrench

Answer

Soldering torch

Question 34

What is a critical aspect of proper drainage in plumbing systems?

Accepted Answer

Preventing water damage

Answer

Filtering impurities

Answer

Maintaining water pressure

Answer

Circulating air

Question 35

Which type of faucet is most commonly installed in residential kitchens?

Accepted Answer

Single-handle faucet

Answer

Touchless faucet

Answer

Two-handle faucet

Answer

Pull-out faucet

Question 36

The primary function of a water heater in a plumbing system is to:

Accepted Answer

Heat water for use in fixtures and appliances

Answer

Remove impurities from water

Answer

Control water flow and pressure

Answer

Provide hot water for bathing and cleaning

Question 37

What is the main role of a mixing valve in a plumbing system?

Accepted Answer

To regulate the temperature of mixed hot and cold water

Answer

To prevent water backflow into the main water supply

Answer

To increase water pressure in the system

Question 38

For drainage purposes in plumbing systems, which type of pipe is typically used?

Accepted Answer

PVC pipe

Answer

Polyethylene pipe

Answer

Galvanized steel pipe

Answer

Copper pipe

Question 39

What is the key distinction between pressure-balance and thermostatic shower valves?

Accepted Answer

Pressure-balance valves maintain water pressure, while thermostatic valves maintain water temperature.

Answer

Thermostatic valves require more maintenance than pressure-balance valves.

Answer

Pressure-balance valves are less expensive than thermostatic valves.

Question 40

For outdoor watering, which type of water fixture is typically used?

Accepted Answer

Hose bib

Answer

Showerhead

Answer

Faucet

Answer

Toilet

Question 41

What is the primary function of a float valve in a toilet?

Accepted Answer

To control the water level in the tank

Answer

To flush waste down the drain

Answer

To prevent water leaks from the tank

Answer

To regulate water pressure in the toilet

Question 42

Which type of faucet is ideal for high-traffic, commercial bathrooms where water conservation is a priority?

Accepted Answer

Sensor-activated faucet

Answer

Compression faucet

Answer

Ball faucet

Answer

Disc faucet

Question 43

What is the primary purpose of a flush valve in a toilet?

Accepted Answer

Control the flow of water into the tank, allowing for a specific volume of water to be released with each flush

Answer

Seal the drain outlet to prevent water leakage

Answer

Regulate the amount of water used per flush, enabling water conservation measures

Question 44

Which type of water heater is considered the most energy-efficient option?

Accepted Answer

Tankless water heater

Answer

Electric storage water heater

Answer

Gas storage water heater

Answer

Solar water heater (if applicable to the region)

Question 45

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

Accepted Answer

Prevent sewer gases from entering the living space by creating a water seal

Answer

Regulate water pressure to ensure optimal flow throughout the system

Answer

Filter out debris from the water flow, preventing clogs and blockages

Question 46

Which of the following is a common issue associated with compression faucets?

Accepted Answer

Leaking due to worn-out washers or O-rings

Answer

Corrosion leading to a weakened body or handle

Answer

Overheating caused by excessive water pressure

Answer

Clogging resulting from mineral buildup

Question 47

What is the recommended height for a bathroom sink to ensure comfortable use and accessibility?

Accepted Answer

32 to 36 inches from the floor to the rim of the sink

Answer

28 to 32 inches

Answer

40 to 44 inches

Answer

36 to 40 inches

Question 48

Which type of water closet is commonly found in commercial buildings due to its space-saving design?

Accepted Answer

Wall-mounted water closet

Answer

Two-piece water closet

Answer

Floor-mounted water closet

Answer

One-piece water closet

Question 49

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

Accepted Answer

Prevent contaminated water from flowing back into the potable water supply, ensuring the safety and quality of drinking water

Answer

Regulate water pressure to maintain a consistent flow throughout the system

Answer

Filter out debris to protect plumbing fixtures and appliances from damage

Question 50

Which of the following is NOT a type of faucet handle?

Accepted Answer

Butterfly

Answer

Cross

Answer

Lever

Answer

Knob

Question 51

What is the purpose of a water closet?

Accepted Answer

To dispose of human waste

Answer

To regulate water temperature

Answer

To aerate water

Answer

To store water for showers

Question 52

Which type of water heater uses a flame to heat water?

Accepted Answer

Gas water heater

Answer

Solar water heater

Answer

Tankless water heater

Answer

Electric water heater

Question 53

What is the minimum distance a toilet flange should be from the wall?

Accepted Answer

12 inches

Answer

9 inches

Answer

18 inches

Answer

15 inches

Question 54

Which of the following is NOT a component of a shower valve?

Accepted Answer

Aerator

Answer

Cartridge

Answer

Spout

Answer

Handle

Question 55

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

Accepted Answer

To prevent sewer gases from escaping

Answer

To regulate water flow

Answer

To store water for flushing

Answer

To filter water

Question 56

Which type of appliance uses cold water only for washing clothes?

Accepted Answer

Washing machine

Answer

Water heater

Answer

Dishwasher

Answer

Refrigerator

Question 57

What is the maximum temperature that a water heater should be set to for residential use?

Accepted Answer

120°F (49°C)

Answer

140°F (60°C)

Answer

160°F (71°C)

Answer

180°F (82°C)

Question 58

Which of the following is a type of water-saving toilet?

Accepted Answer

Dual-flush toilet

Answer

Tankless toilet

Answer

Bidet toilet

Answer

Gravity-flush toilet

Question 59

What is the primary material used in the construction of most bathtubs?

Accepted Answer

Acrylic

Answer

Cast iron

Answer

Fiberglass

Answer

Porcelain