G16 Master Electrician Exam
Question 1 A conductor with a white or gray outer finish is generally used for which purpose?
- Grounding conductor
- Ungrounded (hot) conductor
- Neutral (grounded) conductor
- Equipment bonding conductor
Correct Answer: C
Explanation: According to the NEC, white or gray insulation typically identifies the neutral (grounded) conductor.
Question 2 When local electrical codes differ from the National Electrical Code (NEC), which standard usually takes precedence?
- Always NEC
- The more stringent requirement
- The most recent NEC edition
- Manufacturer recommendations
Correct Answer: B 1 / 4
G16 Master Electrician Exam
Explanation: In most jurisdictions, if local codes are more stringent than the NEC, they take precedence to ensure higher safety standards.
Question 3 According to the NEC, how often is the National Electrical Code updated?
- Every year
- Every three years
- Every five years
- Every ten years
Correct Answer: B
Explanation: The NEC is revised on a three-year cycle to incorporate emerging technologies and safety findings.
Question 4 Which article of the NEC specifically covers grounding and bonding requirements?
- Article 250
- Article 110
- Article 430
- Article 210
- / 4
G16 Master Electrician Exam
Correct Answer: A
Explanation: Article 250 of the NEC deals with grounding and bonding requirements in electrical installations.
Question 5 Which organization publishes the National Electrical Code?
- Occupational Safety and Health Administration (OSHA)
- National Fire Protection Association (NFPA)
- Institute of Electrical and Electronics Engineers (IEEE)
- Underwriters Laboratories (UL)
Correct Answer: B
Explanation: The NEC is published by the NFPA, also known as NFPA 70.
Question 6 What is the primary purpose of the NEC?
- Provide design guidelines for electricians
- Establish electrical safety standards for installations
- Promote energy-efficient building designs
- Define standard wiring color codes 3 / 4
G16 Master Electrician Exam
Correct Answer: B
Explanation: The NEC’s main aim is to ensure the safe installation of electrical wiring and equipment.
Question 7 Which statement best describes the role of the Authority Having Jurisdiction (AHJ)?
- Determines the schedule of electrical inspections
- Enforces local safety codes and approves installations
- Issues manufacturer warranties
- Oversees labor union contracts
Correct Answer: B
Explanation: The AHJ enforces codes and has the final say on approving or rejecting electrical installations.
Question 8 Under NEC guidelines, when is it acceptable to install a fuse in a grounded conductor?
- Only for three-phase systems
- Under no circumstances
- For low-voltage lighting systems
- / 4