FAA AMT (Aviation Maintenance Technician) Airframe Practice Exam

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How is the cabin pressure of a pressurized aircraft usually controlled?

  1. By manual adjustment of the cockpit controls

  2. By an automatic outflow valve

  3. By adjusting engine power

  4. By the pilot’s oxygen mask

The correct answer is: By an automatic outflow valve

In a pressurized aircraft, the cabin pressure is usually controlled by an automatic outflow valve. This valve regulates the airflow out of the pressurized cabin, allowing adjustments to maintain the desired cabin pressure levels during the flight. Manual adjustment of cockpit controls is not typically used for cabin pressure control. Adjusting engine power is unrelated to cabin pressure control. The pilot's oxygen mask is used to provide oxygen to the pilot in case of an emergency, but it is not used to control cabin pressure.

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