FAA AMT (Aviation Maintenance Technician) Airframe Practice Exam

Most current variable displacement hydraulic pumps include a built-in means of system pressure regulation because regulating system pressure is essential for maintaining the overall hydraulic system's efficiency and safety. This feature helps in controlling the pressure within the system, preventing overpressure situations that can damage components or lead to system failures. Additionally, by regulating the system pressure, the pump can operate more effectively in response to varying system demands, providing the necessary fluid flow without causing undue stress on the system.

The other options are not typically found in most current variable displacement hydraulic pumps:

A. A manual override option is not a standard feature in most variable displacement hydraulic pumps as they are designed to automatically adjust displacement based on system requirements.

B. An automatic temperature compensation feature is not a common inclusion in variable displacement hydraulic pumps as their primary function is to adjust displacement based on pressure demands, rather than temperature fluctuations.

D. A digital interface for monitoring is not typically found as a standard feature in most variable displacement pumps, although some advanced models may include digital monitoring capabilities for system diagnostics and troubleshooting.