Which statement accurately describes a double-acting hydraulic cylinder?

Which statement accurately describes a double-acting hydraulic cylinder?

• A. It uses pressure in only one direction for movement
• B. It relies on gravity to move in one direction
• C. It uses pressure in both directions for movement
• D. It does not use hydraulic fluid

Answer: (C)

A double-acting hydraulic cylinder uses hydraulic pressure to move the piston in both directions, giving you powered extension and powered retraction. It’s built with two ports so fluid can be directed to push the piston outward on one stroke and push it inward on the return stroke, all under hydraulic control. This setup means movement doesn’t rely on gravity or springs; the fluid itself provides force in both directions. It also depends on hydraulic fluid to transmit that force. The other ideas don’t fit because one-direction pressure describes a single-acting cylinder, relying on gravity describes an unsupported return often used in non-hydraulic ways, and not using hydraulic fluid would defeat the whole purpose of a hydraulic cylinder.

A double-acting hydraulic cylinder uses hydraulic pressure to move the piston in both directions, giving you powered extension and powered retraction. It’s built with two ports so fluid can be directed to push the piston outward on one stroke and push it inward on the return stroke, all under hydraulic control. This setup means movement doesn’t rely on gravity or springs; the fluid itself provides force in both directions. It also depends on hydraulic fluid to transmit that force. The other ideas don’t fit because one-direction pressure describes a single-acting cylinder, relying on gravity describes an unsupported return often used in non-hydraulic ways, and not using hydraulic fluid would defeat the whole purpose of a hydraulic cylinder.