NCCER module 4 Basic Safety (whole
module)
Trigger lock - Correct answerA small lever, switch, or part that can be used to
activate a locking catch or spring to hold a power tool trigger in the operating mode
without finger pressure.
alternating current - Correct answerA flow of electric charge that regularly
reverses its direction.
Reciprocating - Correct answera type of engine that processes air and fuel by a
back and forth movement of its internal parts
arbor - Correct answera shaded area
Carbide - Correct answerA very hard material made of carbon and one or more
heavy metals. Commonly used in one type of saw blade.
abrasive - Correct answer(adj.) causing irritation, harsh; grinding or wearing
down; (n.) a substance used to smooth or polish
Chuck Key - Correct answerused to change out drill bits on the handle of the flex
shaft or hand drill
revolutions per minute - Correct answerA unit of rotational speed. It is symbolized
as rpm.
Countersink - Correct answera drill bit that enlarges just the surface of a hole so
that a screw head can be accommodated; is sued to allow the top of the fastener to be
sex exactly even with the material to which it's attached otherwise the fastener would
slightly protrude from the material
direct current - Correct answeran electric current that flows in one direction
steadily
Auger bit - Correct answera drill bit that bore larger holes and has a long deep
spiral flute for easy chip removal; used with a brace for drilling holes into wood
