Which device creates movement using pressure?

• A. Compressor
• B. Regulator
• C. Cylinder
• D. Torque

Answer: (C)

Movement is created by a device that uses pressurized fluid to push a piston, turning pressure energy into linear motion. A cylinder does this by having fluid pressure act on the piston inside the bore, causing the piston to move and the rod to extend or retract to do work. In UPS maintenance, this kind of actuator drives clamps, levers, or lift mechanisms by controlled pressurized air or hydraulic fluid.

A compressor only generates and supplies the pressurized fluid; it doesn’t itself move a load. A regulator adjusts the pressure but doesn’t produce movement. Torque is the turning force produced by a rotating element, not a device that creates linear movement. So the cylinder is the component that converts pressure into motion. If you’re dealing with simple actuation, you’ll often see single-acting cylinders using pressure on one side for movement, with a spring or external force returning the piston, or double-acting cylinders using pressure on both sides for extending and retracting.