NCCER module 4 Questions and Answers 100% Pass

Trigger lock - A 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 - A flow of electric charge that regularly reverses its direction. Reciprocating - a type of engine that processes air and fuel by a back and forth movement of its internal parts arbor - a shaded area Carbide - A very hard material made of carbon and one or more heavy metals. Commonly used in one type of saw blade. abrasive - (adj.) causing irritation, harsh; grinding or wearing down; (n.) a substance used to smooth or polish Chuck Key - used to change out drill bits on the handle of the flex shaft or hand drill revolutions per minute - A unit of rotational speed. It is symbolized as rpm.