Annual test for hydraulic lift cylinders not exposed.

• A. Pressure Test
• B. Travel Limit
• C. Runway Enclosure
• D. Self-Closing Door

Answer: (A)

When a hydraulic lift cylinder is not exposed, you verify its integrity by applying a hydraulic pressure test. This test puts the cylinder and its fittings under the system’s operating pressure (often at a higher level) and checks for any pressure drop or leakage over a period. Since you can’t see the inside of an enclosed cylinder, a pressure test is the reliable way to confirm there are no hidden leaks or weak seals. If the pressure holds and no leaks appear, the cylinder is considered sound for continued service.

The other options don’t fit because they relate to movement limits or safety features rather than verifying the hydraulic cylinder’s integrity. A travel limit concerns how far the mechanism moves, a runway enclosure relates to the space around the escalator, and a self-closing door is a safety feature on the landing, not a test of the hydraulic system.