FAA AMT (Aviation Maintenance Technician) Airframe Practice Exam

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What mechanical safety device is incorporated in a gear type hydraulic pump to prevent overload?

Pressure release valve

Shear pin

In a gear type hydraulic pump, a shear pin is incorporated as a mechanical safety device to prevent overload. A shear pin is designed to break if the system experiences an overload or excessive torque, thus protecting the pump from damage. This action helps prevent the pump from being overloaded, which can lead to more extensive and costly repairs.

The other options listed do not serve as mechanical safety devices to prevent overload in a gear type hydraulic pump:

- A pressure release valve is used to regulate pressure in the system and protect it from exceeding safe limits, but it is not specifically intended to prevent overload in the pump.

- An overflow tank is used to collect excess fluid in a hydraulic system and prevent overfilling, but it does not serve as an overload safety device for the pump.

- A backup ring is a type of seal used in hydraulic systems to prevent fluid leakage, it is not a safety device to prevent overload in the pump.

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Overflow tank

Backup ring

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