Which alarms might indicate a problem in the ALRE control system?

Which alarms might indicate a problem in the ALRE control system?

• A. High/low pressure alarms only.
• B. High/low pressure alarms; valve position alarms; leakage alarms; motor overheat; actuator position faults.
• C. Valve position alarms and actuator position faults only.
• D. Leakage alarms and motor overheat only.

Answer: (B)

Alarms in the ALRE control system are designed to catch faults across multiple subsystems that could affect safe operation. High and low pressure alarms alert you to hydraulic pressure deviations, which can be caused by pump problems, leaks, or flow restrictions and can lead to improper actuation if not addressed. Valve position alarms indicate the valve isn’t at the commanded location, which directly impacts how hydraulic power is directed and controlled. Leakage alarms warn of fluid loss, risking pressure drop, contamination, or seals failure, all of which degrade system readiness. Motor overheat alarms signal the drive motor is operating above its thermal limit, pointing to overload, lubrication or cooling issues, and potential motor damage. Actuator position faults show the actuators aren’t reaching or maintaining the intended position, compromising the precise movement of loads and control surfaces. Seeing any of these alarms means there’s a problem somewhere in the control loop—an issue that could affect performance or safety—so including all of these alarms gives the most complete early-warning coverage. In practice, relying only on pressure alarms or only on valve-related faults could miss other critical failures, such as leaks, overheating, or actuator mispositioning, which is why the comprehensive set is the best indicator of a problem.

Alarms in the ALRE control system are designed to catch faults across multiple subsystems that could affect safe operation. High and low pressure alarms alert you to hydraulic pressure deviations, which can be caused by pump problems, leaks, or flow restrictions and can lead to improper actuation if not addressed. Valve position alarms indicate the valve isn’t at the commanded location, which directly impacts how hydraulic power is directed and controlled. Leakage alarms warn of fluid loss, risking pressure drop, contamination, or seals failure, all of which degrade system readiness. Motor overheat alarms signal the drive motor is operating above its thermal limit, pointing to overload, lubrication or cooling issues, and potential motor damage. Actuator position faults show the actuators aren’t reaching or maintaining the intended position, compromising the precise movement of loads and control surfaces.

Seeing any of these alarms means there’s a problem somewhere in the control loop—an issue that could affect performance or safety—so including all of these alarms gives the most complete early-warning coverage. In practice, relying only on pressure alarms or only on valve-related faults could miss other critical failures, such as leaks, overheating, or actuator mispositioning, which is why the comprehensive set is the best indicator of a problem.