Question Bank
250 Questions with Verified Answers & Detailed Rationales
Exam Content Areas:
• General Electrical Knowledge
• Grounding and Bonding
• Services, Feeders, and Branch Circuits
• Wiring Methods and Materials
• Overcurrent Protection
• Motors and Transformers
• Load Calculations
• Alaska Statutes and Regulations
Section 1: NEC Fundamentals & General Knowledge
(Questions 1–30)
1. What is the primary purpose of the National Electrical Code (NEC)?
• A. Establish labor rates for electricians
• B. Provide electrical design specifications only
• C. Safeguard persons and property from electrical hazards
• D. Regulate utility companies
• C. Safeguard persons and property from electrical hazards
Rationale: The NEC is intended to provide practical safeguarding of persons and property
from hazards arising from the use of electricity. It establishes minimum safety standards for
electrical installations.
, 2. How often is the NEC typically revised?
• A. Every year
• B. Every 2 years
• C. Every 3 years
• D. Every 5 years
• C. Every 3 years
Rationale: The NEC is updated on a three-year cycle (e.g., 2020, 2023) to address new
technologies and safety concerns. Alaska typically adopts the latest edition with state-specific
amendments.
3. Which NEC chapter covers wiring methods and materials?
• A. Chapter 1
• B. Chapter 2
• C. Chapter 3
• D. Chapter 4
• C. Chapter 3
Rationale: Chapter 3 of the NEC covers wiring methods and materials, including articles on
various conduit types, cable assemblies, and raceways. Chapter 1 covers general
requirements, Chapter 2 covers wiring and protection, and Chapter 4 covers equipment for
general use.
4. Ohm's Law states that voltage equals:
• A. Power × Current
• B. Current × Resistance
• C. Resistance ÷ Current
• D. Power ÷ Resistance
• B. Current × Resistance
Rationale: Ohm's Law defines the relationship between voltage, current, and resistance: V = I
× R. This is a foundational principle for all electrical circuit analysis.
, 5. The unit of electrical power is the:
• A. Volt
• B. Ampere
• C. Watt
• D. Ohm
• C. Watt
Rationale: Electrical power is measured in watts and represents the rate at which electrical
energy is consumed or produced in a circuit. Power = Voltage × Current (P = V × I).
6. What does "ampacity" refer to?
• A. The voltage rating of a conductor
• B. The insulation type of a conductor
• C. The maximum current a conductor can carry continuously
• D. The resistance of a conductor per unit length
• C. The maximum current a conductor can carry continuously
Rationale: Ampacity is the current-carrying capacity of a conductor under specified
conditions without exceeding its temperature rating. It is a critical factor in conductor sizing.
7. Which conductor is intentionally grounded in an electrical system?
• A. Equipment grounding conductor
• B. Bonding jumper
• C. Grounded conductor (neutral)
• D. Grounding electrode conductor
• C. Grounded conductor (neutral)
Rationale: The grounded conductor is commonly referred to as the neutral and is
intentionally connected to ground at the service equipment. It carries current under normal
operation.