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What is the purpose of the white MCDU MENU annunciator light?

A、It alerts the crew that the MCDU has failed.

B、A system, linked to the MCDU, requeats the display.

C、It alerts the crew that the MCDU MENU page is not available.

答案：B

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A. One.

B. Two.

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A. With avionics bay ambient air

B. With air coming directly from the pack outlet

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When is the emergency lighting system supplied by the EPSUs integrated batteries ?

A. When the EMER EXIT LT selector is in the ON position.

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A. On ground only.

B. In flight only.

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What happens when the LAVatory pushbutton on the FAP is pressed?

A. The LAVATORIES are illuminated at FULL BRIGHTNESS, when the associated LAVATORY DOOR(s) is (are) locked.

B. The LAVATORIES are illuminated at 50% brightness, when the associated LAVATORY DOOR is open or closed.

C. A and B are correct.

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What are the type A DEUs connected to ?

A. To the top line data bus.

B. To the mid line data bus.

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What happens if RMP2 fails

A. The communication systems are inoperative.

B. VHF2 and VHF3 frequencies cannot be controlled.

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How many potable water service and drain panels are fitted to the aircraft ?

A. One

B. Two

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