Practice Test Geeks(CME) Certified Master Electrician Practice Test
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Safety Protocols & Hazard Prevention Flashcards

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

Read the first 7 Safety Protocols & Hazard Prevention flashcards as text

  1. When performing a voltage test to verify absence of voltage before LOTO, which sequence is correct?

    Answer: Test the meter on a known source, test the circuit, test the meter again on a known source

    The safe verification sequence is: confirm meter works on a live source, test the de-energized circuit, then reconfirm meter still works.

  2. An electrician is working in a confined space with potential atmospheric hazards. Which gas is considered the most common cause of fatalities in confined spaces?

    Answer: Oxygen deficiency

    Oxygen deficiency (below 19.5%) is the leading cause of confined space fatalities because it rapidly incapacitates workers.

  3. What is the required working space headroom above the finished floor or platform for electrical equipment rated over 600V?

    Answer: 6.0 feet

    NEC 110.34 requires a minimum headroom of 6.0 feet for electrical equipment rated over 600V.

  4. Which type of ladder is prohibited for use near energized electrical equipment?

    Answer: Aluminum ladder

    Aluminum ladders conduct electricity and must never be used near energized equipment or overhead power lines.

  5. What does 'boundary of the limited approach' represent in NFPA 70E?

    Answer: The closest distance an unqualified person may approach without an escort

    The limited approach boundary is the closest distance an unqualified person may approach energized conductors without escort by a qualified person.

  6. A 120V circuit breaker trips repeatedly under normal load. Beyond the circuit fault, what hidden safety hazard should the electrician inspect for?

    Answer: Loose or corroded connections causing resistive heating

    Loose or corroded connections increase resistance, causing resistive heating that can ignite insulation and surrounding materials.

  7. Under OSHA 1910.137, insulated rubber gloves must be electrically tested at intervals not exceeding how many months?

    Answer: 6 months

    OSHA 1910.137 requires rubber insulating gloves to be tested every 6 months to ensure dielectric integrity.