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, the trigger lock is meant to prevent accidental engagement. Engaging it accidentally can lead to dangerous situations, so it should never be engaged unintentionally. The other options (locking spring, booster, bit shank) are not something one should avoid engaging in the context of general power - tool safety in the way the trigger lock is.

Answer:

d. trigger lock