Practice Test Geeks(STSC) Safety Trained Supervisor Construction Practice Test
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Tool and Equipment Safety Flashcards

7 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 7 Tool and Equipment Safety flashcards as text

  1. What is the primary hazard created by using a pneumatic nail gun with the contact-trip safety feature defeated or bypassed?

    Answer: Unintentional nail discharge and double-fire events that cause penetrating injuries

    Bypassing the contact-trip safety on nail guns is the leading cause of nail gun injuries because it allows unintentional discharge and double fires when the trigger is held.

  2. When should abrasive grinding wheels be inspected for cracks before use?

    Answer: Before each use, using a ring test and visual inspection

    Grinding wheels must be inspected before each use using a ring test (tapping test) and visual check, since a cracked wheel can shatter catastrophically at operating speed.

  3. Which class of portable fire extinguisher is appropriate for a fire involving energized electrical power tools?

    Answer: Class C

    Class C extinguishers are rated for energized electrical fires because they use non-conductive agents that will not conduct electricity back to the operator.

  4. A construction worker uses a jackhammer for four continuous hours. What is the primary occupational health hazard from this exposure?

    Answer: Hand-arm vibration syndrome (HAVS) affecting nerves and circulation

    Prolonged use of vibrating tools like jackhammers can cause hand-arm vibration syndrome (HAVS), a permanent, progressive condition affecting nerves, blood vessels, and joints.

  5. What is the safe method for transferring a tool to another worker on a scaffold or elevated work platform?

    Answer: Use a tool bag, bucket, or hand line to lower or pass tools safely

    Tools must be transferred using a tool bag, bucket, or rope to eliminate the dropped-object hazard to workers and others below the elevated work area.

  6. What action is required when a power tool's electrical cord shows signs of fraying, cracking, or insulation damage?

    Answer: Tag the tool out, remove it from service, and have the cord repaired or replaced

    Damaged cord insulation exposes live conductors and poses an immediate electrocution hazard; the tool must be removed from service immediately for repair or replacement.

  7. Under OSHA's construction standards, who is responsible for ensuring that all hand and power tools used by employees are safe and in good repair?

    Answer: Both the employer and the employee share this responsibility

    OSHA 29 CFR 1926.301 places responsibility on both employers (to provide safe tools) and employees (to use tools properly and report defects) for maintaining tool safety.