Reciprocating __________ utilize a piston moving back and forth in a cylinder. Nearly 2 check valves for the input and output at one end of the cylinder allow one way flow; this gives a pulsed output.

Reciprocating __________ utilize a piston moving back and forth in a c

1.	Reciprocating __________ utilize a piston moving back and forth in a cylinder. Nearly 2 check valves for the input and output at one end of the cylinder allow one way flow; this gives a pulsed output.
A.	Valves
B.	Pumps
C.	Pits
D.	Spots
Answer» C. Pits