What does the lubrication system do?

What does the lubrication system do?

• A. Provides lubrication and cooling to bearings and gears.
• B. Stores hydraulic fluid for flight controls.
• C. Regulates fuel flow to the combustion chamber.
• D. Delivers oil to cockpit instruments.

Answer: (A)

The lubrication system keeps moving parts like bearings and gears from overheating and wearing by delivering oil under pressure to those surfaces. The oil forms a protective film that reduces metal-to-metal contact, carries heat away to an oil cooler, and helps clean passages by picking up particulates. A return/scavenge path keeps the oil circulating and the sump level steady, so the engine stays lubricated even under high-load, high-speed operation. Storing hydraulic fluid, regulating fuel flow, or delivering oil to cockpit instruments aren’t functions of the lubrication system. Hydraulic fluid is for the hydraulic flight-control system, fuel flow is managed by the fuel control system, and cockpit instruments aren’t fed lubrication oil.

The lubrication system keeps moving parts like bearings and gears from overheating and wearing by delivering oil under pressure to those surfaces. The oil forms a protective film that reduces metal-to-metal contact, carries heat away to an oil cooler, and helps clean passages by picking up particulates. A return/scavenge path keeps the oil circulating and the sump level steady, so the engine stays lubricated even under high-load, high-speed operation.

Storing hydraulic fluid, regulating fuel flow, or delivering oil to cockpit instruments aren’t functions of the lubrication system. Hydraulic fluid is for the hydraulic flight-control system, fuel flow is managed by the fuel control system, and cockpit instruments aren’t fed lubrication oil.