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4.9: Review Questions

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    Multiple Choice Questions

    1: How can I protect myself from electrocution hazards?
    (a) maintain a safe distance from overhead power lines
    (b) use ground-fault circuit interrupters (GFCI)
    (c) inspect portable tools and extension cords
    (d) follow lockout/tagout procedures
    (e) all the above

    2. Which of the following is NOT a type of burn caused by electricity?
    (a) electrical burn
    (b) arc/flash burn
    (c) thermal contact burn
    (d) chemical burn

    3. When using ladders or man-baskets near overhead power lines, the primary risk is:
    (a) falling due to imbalance
    (b) contact with energized lines
    (c) overexertion injuries
    (d) slipping in wet conditions

    4. A Ground Fault Circuit Interrupter (GFCI) protects workers by:
    (a) stopping power surges
    (b) detecting ground faults and cutting electricity
    (c) preventing short circuits in fixed wiring
    (d) replacing fuses in circuits

    5. Lockout/Tagout procedures are designed to:
    (a) ensure only licensed electricians work on circuits
    (b) prevent unexpected energization of circuits and equipment
    (c) provide backup power during maintenance
    (d) reduce trip hazards from cords

    6. Which of the following is an improper use of equipment?
    (a) using multi-receptacle boxes as intended
    (b) carrying a tool by its handle
    (c) using two-prong adapters on three-prong cords
    (d) disconnecting cords when changing blades

    7. What should workers do before using an extension cord?
    (a) test it with a voltmeter
    (b) inspect for cuts or abrasions
    (c) wash it with water
    (d) ensure it is the longest cord available

    8. Which factor does not affect the severity of an electric shock?
    (a) amount of current flow
    (b) path of current through the body
    (c) duration of current flow
    (d) voltage rating of the circuit breaker

    9. In the event of power line contact with a crane, what is the safest action for the operator?
    (a) jump out immediately
    (b) remain inside the cab unless fire or explosion is imminent
    (c) climb onto the load to escape
    (d) call for help and wait for instructions

    10. What three factors form the “Electrocution Triangle”?
    (a) voltage, resistance, temperature
    (b) current, path, duration
    (c) PPE, training, voltage
    (d) voltage, ground, path

    11. Which is an example of improper use of electrical equipment?
    (a) using a GFCI with power tools
    (b) repairing extension cords with tape
    (c) inspecting cords daily
    (d) using double-insulated tools

    12. Which condition increases the severity of an electric shock?
    (a) Dry skin
    (b) Wearing rubber-soled boots
    (c) Wet or sweaty skin
    (d) Standing on a wooden platform

    13. What is the most effective first step before working on electrical circuits?
    (a) Checking wire insulation
    (b) Deenergizing and locking out the circuit
    (c) Wearing gloves and safety glasses
    (d) Using double-insulated tools

    14. A worker receives a mild electric shock when touching a metal ladder. What should be done first?
    (a) Continue working and monitor for pain
    (b) Tag and remove the ladder from service for inspection
    (c) Apply electrical tape to the ladder
    (d) Move the ladder closer to the power source

    15. Why are metal ladders discouraged near overhead power lines?
    (a) They are unstable in windy conditions
    (b) They can conduct electricity if contact occurs
    (c) They are heavier than fiberglass ladders
    (d) They require frequent maintenance

    16. What does a GFCI primarily detect?
    (a) Overcurrent
    (b) Short circuit
    (c) Ground fault leakage
    (d) Overvoltage surge

    17. Which statement best describes “Arc flash”?
    (a) A sudden discharge of electrical energy through the air
    (b) A gradual buildup of static electricity
    (c) A type of electromagnetic radiation from power lines
    (d) A safety test for electrical continuity

    True/False Questions

    18. True/False: Electrocution refers to non-fatal shocks that cause injury but not death.
    19. True/False: The covering on overhead power lines provides complete insulation, making them safe to touch.
    20. True/False: Extension cords that have worn insulation or exposed wires can create risks of shocks, burns, or fire.
    21. True/False: A GFCI protects workers by increasing the circuit voltage during overload conditions.
    22. True/False: OSHA requires flexible cords on construction sites to be two-wire type, since grounding is optional.
    23. True/False: It is safe to operate electrical equipment while standing in water if the equipment is double-insulated.
    24. True/False: Proper guarding involves enclosing electrical equipment so that workers cannot accidentally contact live parts.
    25. True/False: Proper training includes teaching workers to deenergize equipment, use cords in good repair, and follow lockout/tagout.
    26. True/False: Look for overhead power lines when operating any equipment.
    27. True/False: Do not operate portable electric tools unless they are grounded or double insulated.
    28. True/False: Workspaces, walkways, and similar locations shall be kept clear of cords.
    29. True/False: Worn or frayed electric cords or cables shall not be used.
    30. True/False: Removing the ground pin from a plug to fit a two-prong outlet is acceptable if done carefully.
    31. True/False: Electrical tape repairs are an acceptable method for fixing damaged extension cords.
    32. True/False: Workers are permitted to perform tasks near energized circuits without PPE if they feel confident
    33. True/False: If an overhead power line contacts a crane, the ground personnel should approach the crane to rescue the operator.
    34. True/False: Running cords through doorways helps prevent extension cord damage.
    35. True/False: It is unsafe to wrap electrical tape around a damaged cord, because it increases voltage in the conductor.

    Answer Key: 1(e), 2(d), 3(b), 4(b), 5(b), 6(c), 7(b), 8(d), 9(b), 10(b), 11(b), 12(c), 13(b), 14(b), 15(b), 16(c), 17(a), 18(False), 19(False), 20(True), 21(False), 22(False), 23(False), 24(True), 25(True), 26(True), 27(True), 28(True), 29(True), 30(False), 31(False), 32(False), 33(False), 34(False), 35(False).

    This page titled 4.9: Review Questions was last modified on Fri, 14 Aug 2026 17:00:17 GMT and is shared under a CC BY 4.0 license and was authored, remixed, and/or curated by Jenny Huang.