Arkansas (Ar) Journeyman Electrician
Examination – Electrical Installation
Classification Questions And Correct
Answers (Verified Answers) Plus
Rationales 2026 Q&A | Instant
Download Pdf
1. What is the primary purpose of grounding in an electrical system?
A. Increase voltage
B. Provide a return path for current
C. Protect against overcurrent
D. Reduce wire size
Correct Answer: C
Rationale: Grounding provides a safe path for fault current to flow to
earth, helping to clear overcurrent protection devices quickly and reducing
the risk of electric shock or fire hazards.
2. According to NEC standards, what color is typically used for the grounded
(neutral) conductor?
A. Green
B. White
C. Black
D. Red
Correct Answer: B
Rationale: The NEC designates white or gray insulation for grounded
, (neutral) conductors to clearly distinguish them from ungrounded (hot)
conductors and ensure safe identification during installation and
maintenance.
3. What is the function of a circuit breaker?
A. Increase current
B. Store electrical energy
C. Protect against overloads and short circuits
D. Convert AC to DC
Correct Answer: C
Rationale: A circuit breaker automatically interrupts current flow when it
detects overload or short-circuit conditions, protecting wiring and
equipment from damage and reducing fire risk.
4. Which tool is used to measure electrical current?
A. Voltmeter
B. Ammeter
C. Ohmmeter
D. Wattmeter
Correct Answer: B
Rationale: An ammeter is designed to measure the flow of electric current
in amperes and is placed in series with the circuit to obtain accurate
readings.
5. What does Ohm’s Law state?
A. V = I × R
B. P = V × I
C. I = P × R
D. R = V × P
Correct Answer: A
, Rationale: Ohm’s Law defines the relationship between voltage, current,
and resistance, stating that voltage equals current multiplied by
resistance, forming the foundation of electrical calculations.
6. What is the minimum clearance for overhead service drop conductors
above residential property?
A. 8 ft
B. 10 ft
C. 12 ft
D. 15 ft
Correct Answer: C
Rationale: NEC requires at least 12 feet of clearance over residential
driveways and areas subject to pedestrian traffic to prevent accidental
contact and ensure safety.
7. What device protects against ground-fault current?
A. Fuse
B. GFCI
C. Transformer
D. Relay
Correct Answer: B
Rationale: A Ground Fault Circuit Interrupter (GFCI) detects imbalance
between hot and neutral conductors and quickly disconnects power to
prevent electric shock hazards.
8. What is the standard frequency of electrical power in the United States?
A. 50 Hz
B. 60 Hz
C. 120 Hz
D. 100 Hz
, Correct Answer: B
Rationale: The United States uses 60 Hz alternating current, which means
the current changes direction 60 times per second, ensuring compatibility
with standard electrical systems.
9. Which material is commonly used for electrical conduit in corrosive
environments?
A. PVC
B. Aluminum
C. Steel
D. Copper
Correct Answer: A
Rationale: PVC conduit is resistant to corrosion and moisture, making it
ideal for underground or corrosive environments where metal conduits
may degrade.
10.What is the purpose of a transformer?
A. Store electricity
B. Change voltage levels
C. Measure resistance
D. Break circuits
Correct Answer: B
Rationale: A transformer transfers electrical energy between circuits and
changes voltage levels (step-up or step-down) using electromagnetic
induction.
11.What type of current flows in one direction only?
A. Alternating current
B. Direct current
C. Pulsating current
Examination – Electrical Installation
Classification Questions And Correct
Answers (Verified Answers) Plus
Rationales 2026 Q&A | Instant
Download Pdf
1. What is the primary purpose of grounding in an electrical system?
A. Increase voltage
B. Provide a return path for current
C. Protect against overcurrent
D. Reduce wire size
Correct Answer: C
Rationale: Grounding provides a safe path for fault current to flow to
earth, helping to clear overcurrent protection devices quickly and reducing
the risk of electric shock or fire hazards.
2. According to NEC standards, what color is typically used for the grounded
(neutral) conductor?
A. Green
B. White
C. Black
D. Red
Correct Answer: B
Rationale: The NEC designates white or gray insulation for grounded
, (neutral) conductors to clearly distinguish them from ungrounded (hot)
conductors and ensure safe identification during installation and
maintenance.
3. What is the function of a circuit breaker?
A. Increase current
B. Store electrical energy
C. Protect against overloads and short circuits
D. Convert AC to DC
Correct Answer: C
Rationale: A circuit breaker automatically interrupts current flow when it
detects overload or short-circuit conditions, protecting wiring and
equipment from damage and reducing fire risk.
4. Which tool is used to measure electrical current?
A. Voltmeter
B. Ammeter
C. Ohmmeter
D. Wattmeter
Correct Answer: B
Rationale: An ammeter is designed to measure the flow of electric current
in amperes and is placed in series with the circuit to obtain accurate
readings.
5. What does Ohm’s Law state?
A. V = I × R
B. P = V × I
C. I = P × R
D. R = V × P
Correct Answer: A
, Rationale: Ohm’s Law defines the relationship between voltage, current,
and resistance, stating that voltage equals current multiplied by
resistance, forming the foundation of electrical calculations.
6. What is the minimum clearance for overhead service drop conductors
above residential property?
A. 8 ft
B. 10 ft
C. 12 ft
D. 15 ft
Correct Answer: C
Rationale: NEC requires at least 12 feet of clearance over residential
driveways and areas subject to pedestrian traffic to prevent accidental
contact and ensure safety.
7. What device protects against ground-fault current?
A. Fuse
B. GFCI
C. Transformer
D. Relay
Correct Answer: B
Rationale: A Ground Fault Circuit Interrupter (GFCI) detects imbalance
between hot and neutral conductors and quickly disconnects power to
prevent electric shock hazards.
8. What is the standard frequency of electrical power in the United States?
A. 50 Hz
B. 60 Hz
C. 120 Hz
D. 100 Hz
, Correct Answer: B
Rationale: The United States uses 60 Hz alternating current, which means
the current changes direction 60 times per second, ensuring compatibility
with standard electrical systems.
9. Which material is commonly used for electrical conduit in corrosive
environments?
A. PVC
B. Aluminum
C. Steel
D. Copper
Correct Answer: A
Rationale: PVC conduit is resistant to corrosion and moisture, making it
ideal for underground or corrosive environments where metal conduits
may degrade.
10.What is the purpose of a transformer?
A. Store electricity
B. Change voltage levels
C. Measure resistance
D. Break circuits
Correct Answer: B
Rationale: A transformer transfers electrical energy between circuits and
changes voltage levels (step-up or step-down) using electromagnetic
induction.
11.What type of current flows in one direction only?
A. Alternating current
B. Direct current
C. Pulsating current
