Test for hydraulic systems under load or no load.

• A. Speed Governor
• B. Capacity Sign
• C. 15 Minute Leak Test
• D. Safety Standard ASME 18.1-2005

Answer: (C)

The test concept here is checking hydraulic leakage by monitoring pressure over time, under both loaded and unloaded conditions. The 15 Minute Leak Test does exactly that: pressurize the hydraulic circuit to the rated pressure, then hold it and watch how the pressure changes for 15 minutes. If the pressure stays essentially steady, the system’s seals, valves, and connections are holding up under load and when empty. If pressure falls noticeably, leaks are present and could lead to drift or loss of control when the car is moving or stopped. The other options aren’t leak tests: a speed governor controls speed, a capacity sign is just a label, and a safety standard is a code reference, not a test procedure.