Basics
What is the unit of electric current?
Ampere
What tool is used to strip the insulation from electrical wires?
Wire stripper
What color wire is typically used for grounding in electrical systems?
Green or bare copper
What does NEC stand for?
National Electrical Code
What is the purpose of a transformer in an electrical system?
To change the voltage level in an electrical circuit
What device is used to measure electric potential difference?
Voltmeter
Which tool is essential for checking if a circuit is live?
Multimeter
Name the organization responsible for setting electrical safety standards in the workplace.
Occupational Safety and Health Administration (OSHA)
In the NEC, what article covers the installation of conductors and equipment within or on buildings?
Article 300
What is the main function of a capacitor in a circuit?
To store and release electrical energy
Name the law that states "The total current entering a junction equals the total current leaving the junction."
Kirchhoff's Current Law
What is the purpose of a conduit bender?
To bend electrical conduits
What personal protective equipment should electricians wear when working on live circuits?
Insulated gloves and safety goggles
What is the minimum gauge of wire typically used for residential electrical outlets?
14-gauge
What is three-phase power, and where is it commonly used?
A type of polyphase system used for distributing alternating current, commonly used in industrial and large commercial settings
What is the formula for electrical power?
P = VI (Power = Voltage x Current)
Name the tool used to fish wires through walls and electrical conduit.
Fish tape
What does the acronym GFCI stand for?
Ground Fault Circuit Interrupter
According to the NEC, how often must GFCI outlets be tested?
Monthly
What does the term "harmonics" refer to in an electrical system?
Voltage or current waveforms at multiples of the fundamental frequency, which can cause power quality issues
What is the unit of resistance?
Ohm
What is a circuit breaker tester used for?
To test the functionality of circuit breakers
What is the purpose of a lockout/tagout procedure?
To ensure that electrical equipment is properly shut off and not started up again before the completion of maintenance or repair work.
What article in the NEC addresses grounding and bonding?
Article 250
Explain what a PLC is and its typical use.
Programmable Logic Controller, used for automation of industrial electromechanical processes