← All ASP Flashcard Decks

Electrical Safety Flashcards

7 cards from real ASP practice questions. Tap to flip, then mark Knew It or Still Learning — missed cards come back until you master them.

Read the first 7 Electrical Safety flashcards as text
  1. What is the minimum approach distance (MAD) concept used for in electrical safety?

    Answer: Determining how far a worker must stay from energized conductors based on voltage level

    Minimum approach distance is the closest distance a qualified worker may approach energized conductors or circuit parts, determined by the system voltage and overvoltage category.

  2. Which OSHA standard primarily governs electrical safety in general industry workplaces?

    Answer: 29 CFR 1910.303–1910.399 (Subpart S)

    OSHA 29 CFR 1910 Subpart S (sections 303–399) covers electrical safety standards for general industry workplaces.

  3. What does an equipotential bonding system accomplish in electrical safety?

    Answer: It ensures all conductive parts are at the same electrical potential to eliminate shock hazard

    Equipotential bonding connects all conductive parts together so no voltage difference exists between them, eliminating the risk of electric shock from step or touch potential.

  4. A worker contacts an energized conductor and cannot let go due to muscle tetany. What physiological phenomenon causes this?

    Answer: Sustained muscle contraction caused by alternating current stimulating motor nerves at 60 Hz

    60 Hz AC causes repeated stimulation of motor nerves, producing sustained involuntary muscle contraction (tetany) that prevents the victim from releasing the conductor.

  5. What is the purpose of a ground fault circuit interrupter (GFCI) compared to a standard circuit breaker?

    Answer: GFCI detects small current imbalances (as low as 4–6 mA) and trips to protect against shock; breakers protect against overloads and short circuits

    GFCIs monitor the difference between hot and neutral current and trip within milliseconds when as little as 4–6 mA is detected flowing through an unintended path, protecting against electrocution.

  6. Under NFPA 70E, an 'electrically safe work condition' requires which sequence of steps?

    Answer: De-energize, verify absence of voltage, apply locks and tags, then test for absence of stored energy

    NFPA 70E requires de-energizing, isolating, locking out/tagging out, releasing stored energy, and verifying absence of voltage before work begins.

  7. Which factor most significantly determines the severity of an electric shock injury?

    Answer: The magnitude of current flowing through the body and the path it takes

    Severity of electrical injury depends primarily on current magnitude (in milliamps) and the path through the body, particularly whether it passes through the heart.