Electrical and Plumbing Systems Quiz: Test Your Knowledge

Question 1

Which of the following is NOT a component of an electrical system in a building?

Accepted Answer

Water heater

Answer

Circuit breaker

Answer

Outlet

Answer

Light fixture

Question 2

What is the standard voltage of a typical household electrical circuit in the United States?

Accepted Answer

120 volts

Answer

110 volts

Answer

220 volts

Answer

240 volts

Question 3

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

Accepted Answer

To reduce the water pressure to a safe level for fixtures and appliances.

Answer

To increase the water pressure to ensure adequate flow.

Answer

To protect the plumbing system from water hammer.

Answer

To prevent leaks in the plumbing system.

Question 4

Which of the following is NOT a type of electrical outlet commonly found in residential buildings?

Accepted Answer

Water heater outlet

Answer

Duplex outlet

Answer

GFCI outlet

Answer

USB outlet

Question 5

What is the key difference between a circuit breaker and a fuse in an electrical system?

Accepted Answer

Circuit breakers can be reset multiple times, while fuses need to be replaced after they blow.

Answer

Fuses are more sensitive to overcurrent than circuit breakers.

Answer

Circuit breakers are more expensive than fuses.

Answer

There is no significant difference between a circuit breaker and a fuse.

Question 6

What is the maximum amperage that a standard 15-amp circuit can safely handle?

Accepted Answer

15 amps

Answer

110 amps

Answer

20 amps

Answer

25 amps

Question 7

What is the primary purpose of a ground fault circuit interrupter (GFCI)?

Accepted Answer

To protect against electrical shocks

Answer

To prevent electrical fires

Answer

To regulate voltage levels

Answer

To isolate faulty circuits

Question 8

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

Accepted Answer

To prevent sewer gases from escaping

Answer

To collect debris and prevent clogs

Answer

To regulate water flow

Answer

To provide access for cleaning

Question 9

Which type of valve is typically used to control water flow in a faucet?

Accepted Answer

Ball valve

Answer

Gate valve

Answer

Check valve

Answer

Pressure relief valve

Question 10

Which type of plumbing fixture is used to dispose of wastewater from a sink?

Accepted Answer

Drain

Answer

Toilet

Answer

Bathtub

Answer

Faucet

Question 11

What is the primary purpose of a circuit breaker?

Accepted Answer

Fulfilling all of the above purposes

Answer

Preventing electrical fires

Answer

Regulating the flow of electricity

Answer

Isolating faulty circuits

Question 12

Which of the following is not a type of electrical outlet?

Accepted Answer

Fuse

Answer

Receptacle

Answer

Switch

Answer

GFCI

Question 13

In an electrical circuit, what color code represents the neutral wire?

Accepted Answer

White

Answer

Black

Answer

Red

Answer

Green

Question 14

To connect two PVC pipes at a 90-degree angle, which type of fitting is used?

Accepted Answer

Elbow

Answer

Tee

Answer

Coupling

Answer

Union

Question 15

Which of the following is not an advantage of using PEX tubing for plumbing?

Accepted Answer

High-pressure tolerance

Answer

Flexibility

Answer

Corrosion resistance

Answer

Cost-effectiveness

Question 16

Which type of electrical wire is specifically designated for grounding purposes?

Accepted Answer

Bare copper

Answer

Aluminum

Answer

Steel

Answer

Insulated copper

Question 17

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

Accepted Answer

To prevent sewer gases from entering the building through the drain

Answer

To regulate the flow of water through the drain

Answer

To provide easy access for cleaning and maintenance

Question 18

What is the primary safety feature provided by a GFI (Ground Fault Interrupter) electrical outlet?

Accepted Answer

Protection against electrical shock hazards

Answer

Voltage regulation

Answer

Surge protection

Answer

Circuit isolation

Question 19

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

Accepted Answer

Elbow

Answer

Coupling

Answer

Tee

Answer

Reducer

Question 20

What is the primary function of circuit breakers in electrical systems?

Accepted Answer

To protect circuits from electrical overloads and short circuits.

Answer

To provide a backup power source in the event of a power outage.

Answer

To control the flow of electricity in the circuit.

Question 21

According to the National Electrical Code (NEC), what is the minimum size wire gauge for branch circuits supplying general lighting?

Accepted Answer

14 AWG (American Wire Gauge)

Answer

16 AWG

Answer

12 AWG

Answer

18 AWG

Question 22

What is the main purpose of a Ground Fault Circuit Interrupter (GFCI) outlet?

Accepted Answer

To prevent electrical shock in the event of a ground fault.

Answer

To isolate electrical components for maintenance.

Answer

To prevent electrical fires.

Answer

To protect against power surges.

Question 23

Which of the following materials is commonly used for plumbing pipes?

Accepted Answer

Polyvinyl Chloride (PVC)

Answer

Concrete

Answer

Glass

Answer

Wood

Question 24

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

Accepted Answer

To prevent sewer gases from entering a building through the drain.

Answer

To control the flow of water through the drain.

Answer

To prevent water from freezing in the drain.

Answer

To collect and remove debris from the drain.

Question 25

What is the minimum size drainpipe required by the International Plumbing Code (IPC) for a bathroom sink?

Accepted Answer

1-1/2 inches in diameter

Answer

1 inch in diameter

Answer

2 inches in diameter

Answer

3 inches in diameter

Question 26

Which of the following is NOT typically considered a plumbing fixture?

Accepted Answer

Electrical outlet

Answer

Toilet

Answer

Sink

Answer

Bathtub

Question 27

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

Accepted Answer

To reduce incoming water pressure to a safe level for the household plumbing system.

Answer

To prevent water from freezing.

Answer

To regulate water temperature.

Answer

To increase water pressure.

Question 28

Which of the following is a common cause of plumbing leaks?

Accepted Answer

Loose or damaged connections

Answer

High water temperature

Answer

Structural damage to the building

Answer

Electrical faults

Question 29

In residential construction, which type of electrical wiring is NOT commonly used?

Accepted Answer

Coaxial cable

Answer

PVC conduit

Answer

MC cable

Answer

Romex

Question 30

What is the primary function of a circuit breaker in an electrical system?

Accepted Answer

Protect the circuit from overcurrent

Answer

Regulate voltage

Answer

Control the flow of electricity

Answer

Store electrical energy

Question 31

For a 20-amp circuit, what is the recommended minimum wire size?

Accepted Answer

12 AWG

Answer

14 AWG

Answer

16 AWG

Answer

18 AWG

Question 32

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

Accepted Answer

Prevent sewer gases from entering the building

Answer

Store water

Answer

Filter impurities from water

Answer

Regulate water flow

Question 33

Which of the following is a type of electrical outlet commonly found in homes?

Accepted Answer

Duplex receptacle

Answer

Circuit breaker

Answer

Junction box

Question 34

What is the primary purpose of a ground fault circuit interrupter (GFCI) in an electrical system?

Accepted Answer

Prevent electrical shock

Answer

Store electrical energy

Answer

Protect against overcurrent

Answer

Regulate voltage

Question 35

Which of the following is NOT considered a plumbing fixture?

Accepted Answer

Light switch

Answer

Bathtub

Answer

Toilet

Answer

Sink

Question 36

In a plumbing system, what is the primary purpose of a water heater?

Accepted Answer

Heat water for use in the building

Answer

Store water

Answer

Filter impurities from water

Answer

Regulate water pressure

Question 37

Which wire type is used exclusively for grounding in electrical systems?

Accepted Answer

Bare copper

Answer

Solid copper

Answer

Insulated aluminum

Answer

Stranded steel

Question 38

What is the primary function of an electrical conduit?

Accepted Answer

To protect and route electrical wires

Answer

To dissipate heat

Answer

To act as a ground

Answer

To provide insulation

Question 39

Which plumbing fixture is specifically designed to prevent the backflow of water into the clean water supply?

Accepted Answer

Backflow preventer

Answer

Faucet

Answer

Toilet

Question 40

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

Accepted Answer

PVC

Answer

Copper

Answer

Cast iron

Answer

Galvanized steel

Question 41

Which electrical code is the governing authority for the installation of electrical systems in residential buildings in the United States?

Accepted Answer

National Electrical Code (NEC)

Answer

American National Standards Institute (ANSI)

Answer

International Building Code (IBC)

Answer

Occupational Safety and Health Administration (OSHA)

Question 42

What is the purpose of a junction box in an electrical system?

Accepted Answer

To provide a connection point for electrical wires

Answer

To dissipate heat

Answer

To act as a fuse

Question 43

Which plumbing fixture is utilized for dispensing water at controlled temperatures?

Accepted Answer

Mixer valve

Answer

Toilet

Answer

Sink

Answer

Bathtub

Question 44

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

Accepted Answer

To heat and store water for distribution

Answer

To pump water

Answer

To filter water

Question 45

Which material is primarily used for electrical wires in residential buildings in the United States?

Accepted Answer

Copper

Answer

Steel

Answer

Aluminum

Answer

Plastic

Question 46

What is the primary function of a circuit breaker in an electrical system?

Accepted Answer

To protect the circuit from overcurrent conditions

Answer

To store energy

Answer

To switch circuits on and off

Answer

To regulate voltage

Question 47

When working with electricity, which safety measure is essential to follow?

Accepted Answer

Turn off the power at the circuit breaker before starting work.

Answer

Carry tools in your pockets while working on electrical systems.

Answer

Use a damp cloth to clean electrical components.

Question 48

In electrical systems, which type of wire is specifically used for grounding?

Accepted Answer

Uninsulated copper wire

Answer

PVC wire

Answer

Aluminum wire

Answer

Insulated copper wire

Question 49

Identify the component of a plumbing drainage system that retains water to create a seal and prevent sewer gases from entering a building:

Accepted Answer

Trap

Answer

Circuit breaker

Answer

Fuse

Answer

Light switch

Question 50

In a plumbing system, what is the primary purpose of a pressure-reducing valve?

Accepted Answer

To regulate water pressure and prevent damage to fixtures and pipes.

Answer

To increase water pressure for better flow rate.

Answer

To prevent backflow of water into the water supply.

Question 51

Which type of electrical outlet provides protection against electrical shocks, especially in areas with moisture?

Accepted Answer

GFCI outlet

Answer

Water valve

Answer

Gas line

Answer

Smoke detector

Question 52

For a 120-volt, 15-amp electrical circuit, the recommended wire gauge is:

Accepted Answer

14 AWG

Answer

16 AWG

Answer

12 AWG

Answer

10 AWG

Question 53

Which of the following is a common type of plumbing pipe material?

Accepted Answer

CPVC

Answer

Romex

Answer

EMT

Answer

BX

Question 54

In an electrical system, what is the primary function of a fuse?

Accepted Answer

To protect the circuit from overcurrent conditions.

Answer

To regulate voltage levels.

Answer

To act as a grounding conductor.

Question 55

Which type of electrical lighting fixture is typically installed flush with the ceiling?

Accepted Answer

Recessed light

Answer

Sink

Answer

Toilet

Answer

Faucet

Question 56

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

Accepted Answer

To prevent sewer gases from entering the building.

Answer

To prevent clogs in the drain line.

Answer

To increase water flow rate.

Answer

To regulate water temperature.