FAA AMT Airframe Practice Exam 2025 – All-in-One Study Guide to Master Aviation Maintenance Technician Certification!

Question: 1 / 1030

Which best describes cabin differential pressure?

The pressure required to open the cabin door

Difference between the fuel pressure and air pressure

Difference between the ambient and internal air pressure

Cabin differential pressure is the difference between the ambient (or external) air pressure and the internal air pressure inside an aircraft cabin. This difference in pressure is important for maintaining a safe and comfortable environment for passengers and crew during flight. Option A is incorrect because the pressure required to open the cabin door is not related to the concept of cabin differential pressure. Option B is incorrect because it refers to the difference between fuel pressure and air pressure, which is not related to the pressure inside the cabin. Option D is incorrect because it only focuses on the ventilation system, which is only one factor that can affect cabin differential pressure. The most accurate and complete description of cabin differential pressure is provided by option C.

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The pressure difference across the ventilation system

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