Most professional certifications for fluid power technicians are valid for up to ___ year(s), at which time they must be renewed.

___ is the size of a space or chamber measured in cubic units.

___ is the highest amount of pressure at which a pump can create fluid flow.

In a(n) ___-center position directional control valve, the cylinder cannot move because there is no fluid flow to or from the cylinder.

The two types of pivot cylinder mounts are the clevis and the pivot.

The main categories of hydraulic pumps are dynamic and ___ pumps.

Resistance must be overcome to perform work.

It is estimated that it costs 10 times more to extract contaminants from hydraulic fl uid than it does to prevent them from entering a hydraulic system.

A flow control valve and a check valve in reverse parallel with each other is also referred to as a ___.

On a schematic diagram, ___ lines are used represent pilot lines.