How many potable water quantity indicators are there ?

A. To send a pneumatic signal to control the FAV.

B. To send a pneumatic signal to the OPV in case of overpressure.

C. To send a pneumatic signal to control the PRV.

A. To avoid negative differential pressure

B. To replace the out outflow valves

C. To prevent excessive positive and negative differential pressure

A. Within five minutes of NAV mode selection when present position has bot been entered.

B. During the alignement phase in case of IRS alignment error.

C. When alignment has been completed.

A. To compensate a complete pressure loss.

B. To dampen rapid movements

C. To supply hydraulic pressure in case of cavitation.

A. Yes, wing tank pumps are always runing

B. No, only when center tank is empty

C. No, because of center tank pump priority

A. To record radio communications during take off and landing.

B. To record crew conversations as soon as an incident occurs.

C. To record crew conversations and communications.

A. Ram Air Turbine (RAT) extension.

B. Nothing.

C. Emergency generator activation.

A. Center tank pump start.

B. Center tank pump stop.

C. Center tank pump stay as they are.

A. When N2 is above 12%.

B. When an engine is started.

C. Only if the Aircraft Electrical Power fails.

A. Manually or automatically depending on flight phases.

B. Manually only.

C. Automatically only depending on flight phases.