#1
Which wire color is typically used for the ground wire in electrical wiring?
#2
What is the standard voltage for household electrical systems in most countries?
110 volts
220 volts
240 volts
360 volts
#3
What is the purpose of polarization in electrical plugs and outlets?
To prevent electrical shocks
To ensure proper grounding
To regulate voltage
To facilitate easy insertion
#4
What is the recommended minimum height for electrical outlets above the floor in residential buildings?
12 inches
18 inches
24 inches
36 inches
#5
What is the purpose of a shunt trip in a circuit breaker?
To trip the circuit breaker remotely
To adjust the trip current of the circuit breaker
To provide a backup power source
To regulate the voltage of the electrical supply
#6
What is the purpose of a lockout/tagout procedure in electrical safety?
To prevent unauthorized access to electrical equipment
To regulate the voltage of electrical circuits
To provide backup power in case of outages
To amplify electrical signals
#7
What does GFCI stand for in electrical safety?
Ground Fault Circuit Interrupter
Generalized Fault Circuit Interference
Grid Fault Correction Index
Grounded Fixture Circuit Integration
#8
Which of the following is NOT a recommended practice for electrical wiring safety?
Using electrical tape to cover exposed wires
Turning off the power before working on electrical circuits
Wearing insulated gloves when handling live wires
Avoiding overloading electrical outlets
#9
What is the purpose of a junction box in electrical wiring?
To hide electrical wires
To provide a secure enclosure for wire connections
To regulate the flow of electricity
To amplify electrical signals
#10
Which type of circuit breaker automatically trips when it detects an overload or short circuit?
Single-pole breaker
Double-pole breaker
Ground Fault Circuit Interrupter (GFCI)
Arc Fault Circuit Interrupter (AFCI)
#11
What is the purpose of a ground wire in electrical wiring?
To carry electrical current
To provide a return path for fault currents
To insulate electrical circuits
To amplify electrical signals
#12
Which of the following is NOT a type of electrical wire insulation?
#13
What is the purpose of a surge protector in an electrical system?
To regulate the voltage of the electrical supply
To prevent overload of electrical circuits
To protect against sudden voltage spikes or surges
To enhance the performance of electrical appliances
#14
What is the purpose of the National Electrical Code (NEC) in the United States?
To regulate the import of electrical equipment
To set standards for electrical installation and safety
To certify electricians
To enforce building codes
#15
Which type of electrical wire is typically used for long-distance transmission of electricity?
Solid copper wire
Aluminum wire
Copper-clad aluminum wire
Stranded copper wire
#16
What is the purpose of an isolator switch in electrical systems?
To regulate voltage
To provide emergency power backup
To isolate a circuit from the power supply for maintenance
To control the flow of electricity
#17
Which organization publishes the International Electrotechnical Commission (IEC) standards?
Underwriters Laboratories (UL)
National Electrical Manufacturers Association (NEMA)
Institute of Electrical and Electronics Engineers (IEEE)
International Electrotechnical Commission (IEC)
#18
What does AFCI stand for in electrical safety?
Arc Fault Circuit Interrupter
Automated Fault Control Interface
Amplified Frequency Control Integration
Advanced Fuse Circuit Inspection