Question

1. when using power tools, never engage the ______. a. locking spring b. booster c. bit shank d. trigger lock

Explanation:

When using power - tools, engaging the trigger lock is a safety measure and should not be disengaged during normal operation. The other options (locking spring, booster, bit shank) are not things that one should "never engage" in the context of power - tool use.

Answer:

D. trigger lock