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ASVAB · Power Tools

Which safety check should always be performed before replacing a blade on a table saw or circular saw?

Correct answer

Disconnect the saw from power (unplug or remove battery) before changing the blade — this prevents accidental startup during blade replacement

  1. A Check the blade sharpness
  2. B Disconnect the saw from power (unplug or remove battery) before changing the blade — this prevents accidental startup during blade replacement
  3. C Check the fence alignment
  4. D Oil the blade arbor

Why this is the answer

LOCKOUT/TAGOUT: Before performing any maintenance or blade change on power tools, disconnect from power. For corded tools: unplug. For battery-powered: remove the battery. For hardwired shop tools: engage the circuit breaker lockout. This is the most critical power tool safety rule — an accidental startup during blade replacement can cause immediate severe injury. Never rely on an ON/OFF switch as the sole safety measure during blade changes.
Source: ASVAB SI, Lockout/Tagout Safety

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