In normal operation, what is the blue hydraulic system pressurized by ?

A. AC BUS 1 or AC BUS 2.

B. AC BUS 1 and AC BUS 2.

C. AC ESS BUS or EMERGENCY GENERATOR.

A. AC ESS Bus is supplied by the EMERG GEN.

B. AC ESS Bus is supplied by AC Bus 1.

C. AC ESS Bus is supplied by AC Bus 2.

A. On ARINC 429 and ARINC 453 buses

B. On Master DSEL and ARINC 453 buses

C. On ARINC 453 and Digital buses

A. EIU takes its power from the engine generator.

B. EIU fails and engine restart is not possible.

C. The ECU & Ignition powers are no longer available.

A. To control mask oxygen inlet.

B. To prevent oxygen inlet to mask.

C. To control oxygen supply during tests and mask operation.

A. The operating striker lever has to be replaced.

B. The diaphragm, in the mechanism housing, and the shear pin must be replaced.

C. The nitrogen bottle has to be replaced.

A. In a container at the bottom of the door.

B. In the overhead stowage compartment over the door.

C. In the cargo compartment.

A. Smoke only.

B. Bottle pressure drop only.

C. Both.

A. TR1 .

B. ESS TR .

C. BAT 2 .

A. Only on the ECAM STATUS page .

B. In the LAST LEG REPORT, the AVIONICS STATUS and the ECAM STATUS page .

C. Class 2 failures are only displayed in flight.