A _______ attached to the float moves up and down inside a cylinder.

a-attached-to-the-float-moves-up-and-down-inside-a-cylinder

A _______ attached to the float moves up and down inside a cylinder.
A. chain
B. barrel
C. piston
D. load

The correct choice is C. piston

A piston attached to the float moves up and down inside a cylinder, fixed to the platform and is therefore relatively stationary. This piston cylinder arrangement is used as a reciprocating air compressor.