A、To control mask oxygen inlet.
B、To prevent oxygen inlet to mask.
C、To control oxygen supply during tests and mask operation.
答案：C
A、To control mask oxygen inlet.
B、To prevent oxygen inlet to mask.
C、To control oxygen supply during tests and mask operation.
答案：C
A. RMP 1 or 2.
B. RMP 1 only.
C. The onside RMP only.
A. Fan air.
B. HP compressor 5th stage air.
C. HP compressor 4th and 9th stage air.
A. WHEEL page.
B. CRUISE page.
C. FTL/CTL page.
A. By a diamond shaped symbol rotating on the heading dial.
B. By the difference between heading reference and actual track symbol.
C. A or B, according to information validity.
A. To decrease the fuel flow in the R/D gallery.
B. To avoid a reverse flow to the R/D gallery.
C. To drain remaining fuel from the R/D gallery.
A. No.
B. Yes.
A. To be connected in parallel.
B. To be supplied by any generator or external power.
C. To be supplied by APU GEN or EXT PWR only.
A. A fixed high pressure cylinder.
B. A high pressure portable cylinder.
C. A fixed cylinder with masks and a breathing hood system.
A. One
B. Two
C. Three.
A. Refueling busbars supplied by service bus 601PP.
B. Refueling busbars supplied by hot bus 701PP
C. Both configurations.
