Apprentice Electrician Licensing Exam
Practice Questions And Correct Answers
(Verified Answers) Plus Rationale 2026
Q&A| Instant Download Pdf
1. Which law best describes the relationship between voltage, current,
and resistance in a simple electrical circuit?
A. Kirchhoff's Voltage Law
B. Ohm's Law
C. Faraday's Law
D. Coulomb's Law
Rationale: Ohm's Law states that voltage equals current multiplied by
resistance (V = I × R). It is the fundamental formula used to calculate
electrical values in basic circuit analysis.
2. What is the SI unit of electrical resistance?
A. Volt
B. Ampere
C. Ohm
D. Watt
Rationale: Resistance is measured in ohms (Ω), which indicate how much a
material opposes the flow of electric current.
3. Which material is considered an excellent electrical conductor?
,A. Rubber
B. Glass
C. Copper
D. Plastic
Rationale: Copper has very low electrical resistance and excellent
conductivity, making it one of the most commonly used materials for
electrical wiring.
4. Current in a conductor is measured using which instrument?
A. Voltmeter
B. Ammeter
C. Ohmmeter
D. Wattmeter
Rationale: An ammeter is connected in series with the circuit to measure
the amount of electrical current flowing through it.
5. Which type of current periodically changes direction?
A. Direct Current (DC)
B. Alternating Current (AC)
C. Static Current
D. Pulsating DC
Rationale: Alternating current reverses direction at regular intervals and is
the standard form of electrical power supplied to homes and businesses.
6. Which personal protective equipment (PPE) is essential when working
on energized electrical equipment?
A. Cotton gloves
B. Leather sandals
C. Insulated rubber gloves
D. Plastic apron
, Rationale: Insulated rubber gloves provide protection against electrical
shock and are designed specifically for electrical work.
7. What is the primary purpose of grounding electrical equipment?
A. Increase voltage
B. Improve efficiency
C. Protect people and equipment from electrical faults
D. Reduce wire size
Rationale: Grounding provides a low-resistance path for fault current,
helping protective devices operate quickly and reducing shock hazards.
8. Which device automatically interrupts current during an overload or
short circuit?
A. Transformer
B. Relay
C. Circuit breaker
D. Capacitor
Rationale: Circuit breakers detect excessive current and automatically
open the circuit to prevent damage and fire hazards.
9. Electrical power is measured in:
A. Volts
B. Amperes
C. Ohms
D. Watts
Rationale: Power represents the rate at which electrical energy is used or
produced and is measured in watts.
10. A series circuit has which characteristic?
Practice Questions And Correct Answers
(Verified Answers) Plus Rationale 2026
Q&A| Instant Download Pdf
1. Which law best describes the relationship between voltage, current,
and resistance in a simple electrical circuit?
A. Kirchhoff's Voltage Law
B. Ohm's Law
C. Faraday's Law
D. Coulomb's Law
Rationale: Ohm's Law states that voltage equals current multiplied by
resistance (V = I × R). It is the fundamental formula used to calculate
electrical values in basic circuit analysis.
2. What is the SI unit of electrical resistance?
A. Volt
B. Ampere
C. Ohm
D. Watt
Rationale: Resistance is measured in ohms (Ω), which indicate how much a
material opposes the flow of electric current.
3. Which material is considered an excellent electrical conductor?
,A. Rubber
B. Glass
C. Copper
D. Plastic
Rationale: Copper has very low electrical resistance and excellent
conductivity, making it one of the most commonly used materials for
electrical wiring.
4. Current in a conductor is measured using which instrument?
A. Voltmeter
B. Ammeter
C. Ohmmeter
D. Wattmeter
Rationale: An ammeter is connected in series with the circuit to measure
the amount of electrical current flowing through it.
5. Which type of current periodically changes direction?
A. Direct Current (DC)
B. Alternating Current (AC)
C. Static Current
D. Pulsating DC
Rationale: Alternating current reverses direction at regular intervals and is
the standard form of electrical power supplied to homes and businesses.
6. Which personal protective equipment (PPE) is essential when working
on energized electrical equipment?
A. Cotton gloves
B. Leather sandals
C. Insulated rubber gloves
D. Plastic apron
, Rationale: Insulated rubber gloves provide protection against electrical
shock and are designed specifically for electrical work.
7. What is the primary purpose of grounding electrical equipment?
A. Increase voltage
B. Improve efficiency
C. Protect people and equipment from electrical faults
D. Reduce wire size
Rationale: Grounding provides a low-resistance path for fault current,
helping protective devices operate quickly and reducing shock hazards.
8. Which device automatically interrupts current during an overload or
short circuit?
A. Transformer
B. Relay
C. Circuit breaker
D. Capacitor
Rationale: Circuit breakers detect excessive current and automatically
open the circuit to prevent damage and fire hazards.
9. Electrical power is measured in:
A. Volts
B. Amperes
C. Ohms
D. Watts
Rationale: Power represents the rate at which electrical energy is used or
produced and is measured in watts.
10. A series circuit has which characteristic?
