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Safety Practices Flashcards

7 cards from real NABCEP 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 Practices flashcards as text

  1. When using a powder-actuated tool to attach racking to a concrete structure, which safety requirement is mandatory?

    Answer: The operator must be trained and hold a valid card for that tool model

    OSHA and most manufacturers require powder-actuated tool operators to complete manufacturer-specific training and carry proof of qualification for each tool model used.

  2. A PV array on a commercial roof is being installed near an HVAC unit with rotating blades. What hazard category does this represent?

    Answer: Mechanical/caught-in hazard

    Exposed rotating HVAC machinery presents a caught-in or amputation hazard, classified as a mechanical hazard requiring guarding or restricted access.

  3. Which OSHA standard governs fall protection requirements for residential rooftop solar installations?

    Answer: 29 CFR 1926.502

    OSHA 29 CFR 1926.502 establishes fall protection systems criteria and practices for construction work, including residential rooftop PV installations.

  4. What is the maximum safe approach distance from an energized overhead power line for uninsulated equipment or workers when the line is operating at 50kV?

    Answer: 10 feet

    OSHA requires a minimum clearance of 10 feet from power lines up to 50kV for uninsulated equipment and workers under 29 CFR 1926.1408.

  5. A technician must enter a rooftop mechanical room to access a DC disconnect. The room has poor ventilation and battery backup. What additional hazard must be assessed?

    Answer: Hydrogen gas accumulation from batteries

    Lead-acid and some battery chemistries can off-gas hydrogen during charging, creating an explosive atmosphere in confined or poorly ventilated spaces.

  6. When a solar installer uses a portable ladder to access a flat roof, at what angle and minimum extension above the roof edge must it be positioned?

    Answer: 75° angle (4:1 ratio); 3 feet above roof edge

    OSHA requires non-self-supporting ladders to be set at a 75.5° angle (4:1 rise-to-run) and extend at least 3 feet above the landing surface.

  7. Which of the following correctly describes an 'assured equipment grounding conductor program' (AEGCP) as an alternative to GFCI protection on a construction site?

    Answer: It requires daily inspections, continuity tests, and documented records for all cord sets and equipment

    An AEGCP requires a written program with daily visual inspections, regular continuity and polarity tests, and documented records as an alternative to GFCI protection under OSHA 29 CFR 1926.404.