Electrician's Licensing Exam Questions and Answers | Latest Version | 2024/2025 | 100% Pass
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Electrician\\\'s Licensing
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Electrician\\\'s Licensing
Electrician's Licensing Exam Questions
and Answers | Latest Version | 2024/2025
| 100% Pass
What is the purpose of a ground fault circuit interrupter (GFCI)?
A GFCI is designed to protect people from electrical shock by shutting off the circuit when
it detects that current is flowing alon...
Electrician's Licensing Exam Questions
and Answers | Latest Version | 2024/2025
| 100% Pass
What is the purpose of a ground fault circuit interrupter (GFCI)?
✔✔ A GFCI is designed to protect people from electrical shock by shutting off the circuit when
it detects that current is flowing along an unintended path, such as through water or a person.
What is the minimum depth that electrical conduit must be buried in residential outdoor
installations?
✔✔ Electrical conduit must be buried at least 18 inches deep in residential outdoor installations.
Explain the function of a circuit breaker.
✔✔ A circuit breaker is a safety device designed to interrupt the flow of electricity in a circuit
when the current exceeds a safe level, preventing overheating and potential fire hazards.
How is the total current in a parallel circuit calculated?
✔✔ The total current in a parallel circuit is the sum of the currents flowing through each
individual branch.
1
,What is the required color for a grounding wire in residential wiring?
✔✔ The grounding wire is required to be either bare copper or covered with green insulation.
Describe how a 3-way switch operates in a lighting circuit.
✔✔ A 3-way switch allows control of a light from two different locations by using two switches
that alternate opening and closing two circuits.
What does the term "ampacity" refer to in electrical wiring?
✔✔ Ampacity refers to the maximum amount of current that a conductor or wire can carry safely
without overheating.
What is the purpose of a bonding jumper?
✔✔ A bonding jumper is used to connect non-current-carrying metal parts of electrical
equipment together to ensure they are at the same electrical potential and to help protect against
shock.
How is the size of an electrical service determined in a residential home?
✔✔ The size of an electrical service is determined by the total calculated load of the house,
including lighting, appliances, heating, and other equipment, and is measured in amperes (amps).
2
,What is the function of an arc fault circuit interrupter (AFCI)?
✔✔ An AFCI protects against electrical fires by detecting and interrupting arcs in the wiring,
which are a common cause of electrical fires.
Describe the difference between a single-phase and a three-phase electrical system.
✔✔ A single-phase system uses one alternating current (AC) phase to deliver power, typically
for residential use, while a three-phase system uses three AC phases and is common in
commercial and industrial settings for higher power loads.
How is voltage drop calculated in an electrical circuit?
✔✔ Voltage drop is calculated using the formula: Voltage Drop = Current (I) x Resistance (R),
where current is in amperes and resistance is in ohms.
What are the required clearances around an electrical panel?
✔✔ The required clearance around an electrical panel is 30 inches wide, 36 inches deep, and 6.5
feet high, to ensure safe access for maintenance and operation.
What is the primary function of a service disconnect?
3
, ✔✔ The primary function of a service disconnect is to shut off all electrical power to a building
or structure, usually for emergency purposes or maintenance.
Explain why aluminum wire requires special consideration in electrical installations.
✔✔ Aluminum wire expands and contracts more than copper wire with temperature changes,
which can cause connections to loosen. Special connectors and anti-oxidizing compounds are
required to prevent corrosion and ensure safe connections.
How are conductors sized for voltage drop compensation over long distances?
✔✔ Conductors are sized larger than normal to compensate for voltage drop over long distances
by reducing the resistance, ensuring adequate voltage reaches the load.
What type of receptacle is required in a kitchen near a water source?
✔✔ A GFCI (Ground Fault Circuit Interrupter) receptacle is required in a kitchen near a water
source to protect against electric shock.
What is the purpose of a transformer in an electrical system?
✔✔ A transformer is used to change the voltage level in an electrical system, either stepping it
up for transmission over long distances or stepping it down for safe use in homes and businesses.
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