Practice Test Geeks(STSC) Safety Trained Supervisor Construction Practice Test
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Electrical Safety in Construction Flashcards

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

Read the first 6 Electrical Safety in Construction flashcards as text

  1. What is the voltage range classified as 'high voltage' under NFPA 70E for arc flash hazard analysis purposes?

    Answer: Above 600V

    NFPA 70E and OSHA classify voltages above 600V as 'high voltage,' triggering more stringent arc flash and electrical safety requirements including greater approach boundaries and higher-rated arc flash PPE.

  2. Under OSHA 1926.416, what does the term 'qualified person' mean in the context of electrical work on a construction site?

    Answer: A person who has received training in and has demonstrated skills and knowledge related to the construction and operation of electrical equipment

    A qualified person (electrical) under OSHA 1926.416 is one who has demonstrated skills and knowledge related to electrical equipment operation and construction, and has received safety training on the hazards involved.

  3. A power tool's power cord on a construction site shows evidence of insulation damage (cracked, frayed sheath). What is the CORRECT action?

    Answer: Remove from service, tag out, and arrange for proper repair or replacement

    Damaged insulation on a power cord is a shock and electrocution hazard. The tool must be immediately removed from service, tagged out to prevent use, and repaired or replaced by qualified personnel.

  4. Which of the following correctly describes the 'limited approach boundary' in electrical safety?

    Answer: The closest distance an unqualified person may approach energized conductors without special authorization

    The Limited Approach Boundary (NFPA 70E) is the distance from an exposed energized conductor within which unqualified persons may not enter unless escorted and protected. Beyond this boundary, workers need limited training; within it, full electrical safety precautions apply.

  5. What type of fire extinguisher is required for electrical fires on a construction site?

    Answer: Class C (CO2, dry chemical, or clean agent)

    Class C fire extinguishers are required for electrical fires. Class C designation indicates the extinguishing agent is non-conductive, preventing shock to the person using the extinguisher.

  6. What minimum PPE must workers wear when working on or near exposed energized electrical parts on a construction site according to OSHA 1926.416?

    Answer: Insulated gloves rated for the voltage, safety glasses, and non-conductive footwear

    OSHA 1926.416 and NFPA 70E require insulated gloves rated for the working voltage, safety glasses or face protection, and non-conductive footwear as minimum PPE for work near exposed energized parts.