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NEBRASKA ELECTRICAL JOURNEYMAN LICENSE
EXAM|QUESTION AND ANSWER WITH
RATIONALE|GRADED A+|100% CORRECT|2026 UPDATE
1 – 20: NEC, CIRCUITS & ELECTRICAL THEORY
1. The primary purpose of the National Electrical Code (NEC) is to: A. Maximize profit B. Ensure electrical safety C. Design buildings D. Control utilities Answer: B Rationale: The NEC exists to establish minimum safety standards for electrical installations. 2. The NEC is published by: A. OSHA B. NFPA C. EPA D. DOE Answer: B Rationale: The National Fire Protection Association publishes NEC (NFPA 70). 3. Voltage is defined as: A. Resistance to flow B. Electrical potential difference C. Electron speed D. Heat energy Answer: B Rationale: Voltage is the electrical “pressure” that drives current. 4. Current is measured in: A. Volts B. Ohms
C. Amps D. Watts Answer: C Rationale: Current is the flow of electrons measured in amperes.
5. Resistance is measured in: A. Watts B. Ohms C. Volts D. Amps Answer: B Rationale: Ohms measure opposition to current flow. 6. Ohm’s Law is: A. V = I × R B. P = V × I C. I = P / R D. V = P × I Answer: A Rationale: Fundamental electrical relationship between voltage, current, and resistance. 7. Electrical power is measured in: A. Volts B. Amps C. Watts D. Ohms Answer: C Rationale: Power is the rate of energy use measured in watts. 8. A conductor is a material that: A. Stops current B. Allows current flow C. Stores electricity D. Blocks voltage
13. Series circuits have: A. Multiple paths B. One path C. No resistance D. Infinite voltage Answer: B Rationale: Current flows through one continuous path. 14. Parallel circuits have: A. One path B. Multiple paths C. No voltage D. No resistance Answer: B Rationale: Current splits into different branches. 15. Power formula is: A. P = V × I B. P = V / I C. P = I / R D. P = R × V Answer: A Rationale: Electrical power equals voltage times current. 16. Short circuit is: A. Normal operation B. Unintended low-resistance path C. High resistance path D. Open circuit Answer: B Rationale: Current bypasses load causing danger.
17. Grounding protects by: A. Increasing voltage B. Providing safe fault path C. Blocking current D. Increasing resistance Answer: B Rationale: Diverts fault current safely to earth. 18. Load in a circuit is: A. Power source B. Device that consumes electricity C. Wire type D. Ground system Answer: B Rationale: Electrical devices that use energy. 19. AC current flows: A. One direction B. Alternating direction C. No direction D. Randomly Answer: B Rationale: AC reverses direction periodically. 20. DC current flows: A. Alternating direction B. One direction C. No flow D. Random flow Answer: B Rationale: Direct current flows steadily one way. 21 – 40: CODE, SAFETY & INSTALLATION PRACTICES
B. Explosive electrical discharge C. Wire coating D. Voltage drop Answer: B Rationale: Dangerous high-energy fault event.
26. Lockout/tagout prevents: A. Energy savings B. Accidental energizing C. Voltage increase D. Wiring errors Answer: B Rationale: Ensures equipment is de-energized. 27. Electrical fires require: A. Water B. Class C extinguisher C. Oil D. Air Answer: B Rationale: Safe for energized electrical fires. 28. Conduit is used for: A. Heat transfer B. Wire protection C. Voltage increase D. Energy storage Answer: B Rationale: Protects electrical conductors. 29. Wire gauge refers to: A. Color B. Thickness C. Voltage
D. Material Answer: B Rationale: Determines current-carrying capacity.
30. Higher AWG number means: A. Thicker wire B. Thinner wire C. More voltage D. More resistance Answer: B Rationale: Larger number = smaller wire. 31. Neutral wire is usually: A. Black B. White C. Green D. Red Answer: B Rationale: Standard neutral conductor color. 32. Ground wire is typically: A. Blue B. Green or bare C. Red D. White Answer: B Rationale: Safety grounding conductor. 33. Hot wire carries: A. No voltage B. Live voltage C. Ground only D. Neutral current
38. Electrical bonding ensures: A. Insulation B. Electrical continuity between metal parts C. Higher voltage D. Resistance increase Answer: B Rationale: Prevents voltage differences. 39. Permits ensure: A. Random installation B. Code compliance C. Faster work D. Lower cost Answer: B Rationale: Legal approval for work. 40. Electrical inspection verifies: A. Speed B. Safety and code compliance C. Color coding D. Profit Answer: B Rationale: Ensures safe installation. **41 – 60: ADVANCED INSTALLATION & SYSTEMS
- Transformer function is to:** A. Store current B. Change voltage levels C. Cut wires D. Ground systems Answer: B Rationale: Steps voltage up or down.
42. Primary side of transformer is: A. Output side B. Input side C. Ground side D. Neutral side Answer: B Rationale: Receives incoming power. 43. Secondary side is: A. Input B. Output C. Ground D. Neutral Answer: B Rationale: Delivers transformed voltage. 44. Load calculation determines: A. Color codes B. Electrical demand C. Pipe size D. Temperature Answer: B Rationale: Ensures correct system sizing. 45. Branch circuits supply: A. Main power B. Specific loads C. Ground only D. Batteries Answer: B Rationale: Power distribution to devices.
B. Megohmmeter C. Voltmeter D. Clamp meter Answer: B Rationale: Tests insulation integrity.
51. Three-phase power is used for: A. Small homes B. Industrial loads C. Batteries D. Lighting only Answer: B Rationale: Efficient high-power systems. 52. Power factor measures: A. Resistance B. Efficiency C. Voltage D. Current only Answer: B Rationale: Efficiency of power usage. 53. Harmonics cause: A. Stability B. Power distortion C. Safety increase D. No effect Answer: B Rationale: Affects power quality. 54. Electrical efficiency improves when: A. Losses are high B. Resistance is high C. Losses are reduced
D. Voltage drops Answer: C Rationale: Less wasted energy.
55. Ground fault occurs when: A. Normal load B. Current leaks to ground C. Voltage rises D. Wire breaks only Answer: B Rationale: Fault current leakage. 56. Continuity test checks: A. Voltage B. Path completeness C. Power level D. Resistance only Answer: B Rationale: Confirms circuit integrity. 57. Electrical diagrams show: A. Water flow B. Wiring layout C. Gas lines D. Plumbing Answer: B Rationale: Circuit representation. 58. Conduit bending tools are used to: A. Cut wires B. Shape conduit C. Test voltage D. Measure current
D. Noise Answer: B Rationale: Detects dangerous arc faults.
63. Electrical bonding prevents: A. Continuity B. Voltage differences between metal parts C. Current flow D. Grounding Answer: B Rationale: Equalizes electrical potential. 64. Electrical labeling improves: A. Confusion B. Safety and identification C. Errors D. Resistance Answer: B Rationale: Clear circuit identification. 65. Electrical load balancing ensures: A. Uneven distribution B. Equal phase distribution C. Higher losses D. Short circuits Answer: B Rationale: Improves system stability. 66. Proper torque on connections prevents: A. Stability B. Loose connections and overheating C. Voltage drop D. Grounding
Answer: B Rationale: Ensures safe connections.
67. Electrical code violations may result in: A. Bonuses B. Fines and shutdown C. Rewards D. Faster approval Answer: B Rationale: Legal penalties apply. 68. Temporary wiring must be: A. Permanent B. Code compliant C. Random D. Uninspected Answer: B Rationale: Must still meet safety standards. 69. Electrical testing is done to: A. Delay work B. Verify safety and function C. Increase errors D. Reduce quality Answer: B Rationale: Ensures system integrity. 70. Grounding electrode system connects to: A. Air B. Earth C. Plastic D. Wood Answer: B Rationale: Provides earth reference.
75. Energy efficiency improves when: A. Losses increase B. Resistance decreases C. Wiring is poor D. Voltage drops Answer: B Rationale: Reduces wasted energy. 76. Emergency shutdown systems are used to: A. Increase voltage B. Quickly disconnect power C. Store energy D. Slow circuits Answer: B Rationale: Safety emergency control. 77. Electrical apprenticeship leads to: A. No career path B. Journeyman license qualification C. Random jobs D. No certification Answer: B Rationale: Step toward licensure. 78. Code updates are important because: A. They are optional B. Technology and safety standards evolve C. They reduce safety D. They are random Answer: B Rationale: Keeps standards current. 79. Electrical work must always prioritize: A. Speed
B. Safety C. Cost only D. Appearance Answer: B Rationale: Safety is the top priority.
80. Final goal of a journeyman electrician is to: A. Avoid regulations B. Perform safe, code-compliant electrical work independently C. Skip inspections D. Work unsafely Answer: B Rationale: Fully qualified licensed electrician standard.
