When using power tools, never engage the _____. a. locking spring b. booster c. bit shank d. trigger lock
trigger lock
Before replacing parts such as bits, blades, or discs on any tool, you must _____. a. polish it with a fine steel wool b. recharge the tool's battery c. disconnect the power source d. inspect them for cracks
disconnect the power source
Most hammer drills will not hammer until pressure is _____. a. released from the powder charge b. reached in the hydraulic cylinder c. detected at the trigger lock d. applied to the drill bit
applied to the drill bit
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