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At 39,000 feet altitude, the cabin pressure of an aircraft would be automatically maintained at _________ feet.

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At 39,000 feet altitude, the cabin pressure of an aircraft would be automatically maintained at _________ feet.

(a) 15,000

(b) 10,300

(c) 2,000

(d) 6,900

The question was posed to me by my school teacher while I was bunking the class.

This key question is from Aircraft Systems and Aviation topic in chapter Aircraft Systems and Aviation Overview of Aircraft Maintenance

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The correct option is (d) 6,900

For explanation: The cabin pressure is automatically maintained near about 6,900 feet when the aircraft is flying at 39,000 feet. The pressure may also be specified as 79 kPa of atmosphere pressure.

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