ALASKA (AK) Residential Wiring Exam
Question 1. Which of the following best describes Ohm's Law?
A) Voltage equals current times resistance
B) Power equals voltage times current
C) Resistance is directly proportional to voltage
D) Current is inversely proportional to power
Answer: A
Explanation: Ohm's Law states that Voltage (V) equals Current (I) multiplied by Resistance (R), expressed
as V=IR. This fundamental principle relates electrical potential, flow, and opposition.
Question 2. In a DC circuit, which components are connected in series?
A) Components with multiple pathways
B) Components with a single pathway for current
C) Components that are grounded
D) Components that are insulated
Answer: B
Explanation: Series circuits have components connected end-to-end in a single pathway, so current
flows through each component sequentially.
Question 3. Which material is classified as an insulator?
A) Copper
B) Aluminum
C) Rubber
D) Silver
Answer: C
Explanation: Rubber is an insulator because it resists the flow of electrical current, protecting users from
shock.
Question 4. What is the primary effect of magnetism in electrical systems?
A) Generating heat
B) Producing magnetic fields that can induce current
, ALASKA (AK) Residential Wiring Exam
C) Increasing resistance
D) Decreasing voltage
Answer: B
Explanation: Magnetism in electrical systems is utilized to induce current in conductors through
changing magnetic fields, fundamental to transformers and motors.
Question 5. Which unit measures electrical energy consumption over time?
A) Volt
B) Ampere
C) Watt
D) Kilowatt-hour
Answer: D
Explanation: Kilowatt-hour (kWh) is the unit of energy used to quantify electrical consumption over a
period.
Question 6. When using a multimeter to measure resistance, what setting should it be in?
A) Voltage
B) Current
C) Resistance
D) Continuity
Answer: C
Explanation: To measure resistance, the multimeter must be set to the resistance (Ω) mode.
Question 7. Which device provides overcurrent protection in residential wiring?
A) Ground-Fault Circuit Interrupter (GFCI)
B) Arc-Fault Circuit Interrupter (AFCI)
C) Circuit breaker
D) Surge protector
Answer: C
, ALASKA (AK) Residential Wiring Exam
Explanation: Circuit breakers are designed to protect circuits from overcurrent by automatically
disconnecting power when rated current is exceeded.
Question 8. Which type of circuit breaker is primarily used to prevent arc faults?
A) Standard circuit breaker
B) Ground-fault circuit breaker
C) AFCI (Arc-Fault Circuit Interrupter)
D) GFCI
Answer: C
Explanation: AFCIs detect arc faults and disconnect power to prevent fires caused by arcing.
Question 9. What is the purpose of a GFCI device?
A) Protect against overloads
B) Protect against ground faults
C) Protect against short circuits
D) Protect against overvoltage
Answer: B
Explanation: GFCIs detect imbalance in current between hot and neutral conductors, providing
protection from ground faults that can cause shock.
Question 10. What is a primary safety practice when working on electrical systems?
A) Working without PPE to increase dexterity
B) Lockout/Tagout procedures to de-energize circuits
C) Ignoring hazard signs
D) Bypassing circuit protection devices
Answer: B
Explanation: Lockout/Tagout procedures ensure circuits are de-energized and safe before maintenance,
preventing accidental energization.
Question 11. Which PPE should be worn when working on energized circuits?
, ALASKA (AK) Residential Wiring Exam
A) Safety glasses, insulated gloves, and flame-resistant clothing
B) Shorts and sandals
C) No PPE needed
D) Only a hard hat
Answer: A
Explanation: Insulated gloves, safety glasses, and flame-resistant clothing protect against electrical
shocks and burns.
Question 12. What is the main reason for proper grounding in electrical systems?
A) To increase voltage
B) To prevent electrical shock and fires
C) To make wiring easier
D) To reduce resistance
Answer: B
Explanation: Proper grounding provides a safe path for fault currents, reducing the risk of shock and fire.
Question 13. Which article of the NEC covers general requirements for electrical installations?
A) Article 110
B) Article 200
C) Article 240
D) Article 400
Answer: A
Explanation: Article 110 outlines general requirements for safe electrical installation practices.
Question 14. Under the NEC, which is a permissive rule?
A) A rule that must be followed at all times
B) A recommended practice that is not mandatory
C) A rule that is illegal
D) A rule applicable only in Alaska
Question 1. Which of the following best describes Ohm's Law?
A) Voltage equals current times resistance
B) Power equals voltage times current
C) Resistance is directly proportional to voltage
D) Current is inversely proportional to power
Answer: A
Explanation: Ohm's Law states that Voltage (V) equals Current (I) multiplied by Resistance (R), expressed
as V=IR. This fundamental principle relates electrical potential, flow, and opposition.
Question 2. In a DC circuit, which components are connected in series?
A) Components with multiple pathways
B) Components with a single pathway for current
C) Components that are grounded
D) Components that are insulated
Answer: B
Explanation: Series circuits have components connected end-to-end in a single pathway, so current
flows through each component sequentially.
Question 3. Which material is classified as an insulator?
A) Copper
B) Aluminum
C) Rubber
D) Silver
Answer: C
Explanation: Rubber is an insulator because it resists the flow of electrical current, protecting users from
shock.
Question 4. What is the primary effect of magnetism in electrical systems?
A) Generating heat
B) Producing magnetic fields that can induce current
, ALASKA (AK) Residential Wiring Exam
C) Increasing resistance
D) Decreasing voltage
Answer: B
Explanation: Magnetism in electrical systems is utilized to induce current in conductors through
changing magnetic fields, fundamental to transformers and motors.
Question 5. Which unit measures electrical energy consumption over time?
A) Volt
B) Ampere
C) Watt
D) Kilowatt-hour
Answer: D
Explanation: Kilowatt-hour (kWh) is the unit of energy used to quantify electrical consumption over a
period.
Question 6. When using a multimeter to measure resistance, what setting should it be in?
A) Voltage
B) Current
C) Resistance
D) Continuity
Answer: C
Explanation: To measure resistance, the multimeter must be set to the resistance (Ω) mode.
Question 7. Which device provides overcurrent protection in residential wiring?
A) Ground-Fault Circuit Interrupter (GFCI)
B) Arc-Fault Circuit Interrupter (AFCI)
C) Circuit breaker
D) Surge protector
Answer: C
, ALASKA (AK) Residential Wiring Exam
Explanation: Circuit breakers are designed to protect circuits from overcurrent by automatically
disconnecting power when rated current is exceeded.
Question 8. Which type of circuit breaker is primarily used to prevent arc faults?
A) Standard circuit breaker
B) Ground-fault circuit breaker
C) AFCI (Arc-Fault Circuit Interrupter)
D) GFCI
Answer: C
Explanation: AFCIs detect arc faults and disconnect power to prevent fires caused by arcing.
Question 9. What is the purpose of a GFCI device?
A) Protect against overloads
B) Protect against ground faults
C) Protect against short circuits
D) Protect against overvoltage
Answer: B
Explanation: GFCIs detect imbalance in current between hot and neutral conductors, providing
protection from ground faults that can cause shock.
Question 10. What is a primary safety practice when working on electrical systems?
A) Working without PPE to increase dexterity
B) Lockout/Tagout procedures to de-energize circuits
C) Ignoring hazard signs
D) Bypassing circuit protection devices
Answer: B
Explanation: Lockout/Tagout procedures ensure circuits are de-energized and safe before maintenance,
preventing accidental energization.
Question 11. Which PPE should be worn when working on energized circuits?
, ALASKA (AK) Residential Wiring Exam
A) Safety glasses, insulated gloves, and flame-resistant clothing
B) Shorts and sandals
C) No PPE needed
D) Only a hard hat
Answer: A
Explanation: Insulated gloves, safety glasses, and flame-resistant clothing protect against electrical
shocks and burns.
Question 12. What is the main reason for proper grounding in electrical systems?
A) To increase voltage
B) To prevent electrical shock and fires
C) To make wiring easier
D) To reduce resistance
Answer: B
Explanation: Proper grounding provides a safe path for fault currents, reducing the risk of shock and fire.
Question 13. Which article of the NEC covers general requirements for electrical installations?
A) Article 110
B) Article 200
C) Article 240
D) Article 400
Answer: A
Explanation: Article 110 outlines general requirements for safe electrical installation practices.
Question 14. Under the NEC, which is a permissive rule?
A) A rule that must be followed at all times
B) A recommended practice that is not mandatory
C) A rule that is illegal
D) A rule applicable only in Alaska
