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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?

Reviewed by Jordan Morley, Editorial Lead at 247SimpleTests. Written by the 247SimpleTests Editorial Team from the official source material cited on every question.

Correct answer

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

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

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

Practice more questions

This question is from our ASVAB Practice Tests practice test. Take the full practice test to test your knowledge across all Power Tools and other topics.

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About this topic: Power Tools

Power tools questions cover drills, saws (circular, jig, band, table), grinders, sanders and routers — what each is for, the blade or bit it uses, and the safety rule that goes with it. This is one of 10 Shop Information questions on power tools, each with a full explanation on a single study page.

New to this exam? Our ASVAB exam guide explains the format, scoring, and how to prepare.

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