The LO unloader actuation medium is which?

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Prepare for the Gas Turbine Systems Technician – Mechanical A School Test 1. Study with multiple choice questions that come with hints and explanations. Ace your exam!

Multiple Choice

The LO unloader actuation medium is which?

Explanation:
Hydraulic fluid power. The LO unloader needs a strong, controllable, and smooth actuation to move the mechanism against system pressures and hold its position without drift. Hydraulic actuation provides high force in a compact cylinder, excellent stiffness due to the incompressible fluid, and good damping, which helps prevent shocks during start/stop cycles. Pneumatic systems, being air-based, are more compressible and can have lag and less precise holding force; electrical or mechanical actuators typically don’t offer the same combination of high, controllable force and reliable position control in this application.

Hydraulic fluid power. The LO unloader needs a strong, controllable, and smooth actuation to move the mechanism against system pressures and hold its position without drift. Hydraulic actuation provides high force in a compact cylinder, excellent stiffness due to the incompressible fluid, and good damping, which helps prevent shocks during start/stop cycles. Pneumatic systems, being air-based, are more compressible and can have lag and less precise holding force; electrical or mechanical actuators typically don’t offer the same combination of high, controllable force and reliable position control in this application.

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