Question id 382 - Aircraft General Knowledge - Airframe, Systems, Powerplant - ATPL - Airline Transport Pilot license

Aircraft General Knowledge - Airframe, Systems, Powerplant - Reference should be made to the fuel supply system shown in annex. In flight, with centre tank empty and APU operating, a fuel unbalance is detected (quantity in tank 1 < quantity in tank 2). Rebalancing of the two tanks is:
Impossible without causing the APU to stop.
Possible with 'CROSSFEED' open and tank 1 pumps 'OFF' and tank 2 pumps 'ON'.
Impossible because there is no fuel in centre tank.
Possible with 'CROSSFEED' open and tank 2 pumps 'OFF'.

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