更多"[单选题]If bleed pressure fails, engin"的相关试题:
[单选题]When a side of engine bleed fails, because of the performance of precooler, when pilots use wing anti-icing, they must：
A. turn off a set of PACK
B. start APU
C. descend to under 10000feet
[单选题]The green engine bleed pressure numbers indicate the bleed upstream of the precooler. When do these numbers become amber?
A. When the pressure drops below 21 PSI with N2≥10%.
B. When there is an overpressure.
C. Both of the above are correct.
[单选题]A side of engine bleed pressure is abnormal, the outlet temperature of residual pneumatic precooler exceeds 240 ℃ within 2 minutes after x-bleed valve opens, turn off the affected PACK, and the remaining pack will automatically transmit
A. High-flow
B. Medium-flow
C. Low-flow
[单选题]In flight, if pressure controller 1 fails：
A.manual operation must be performed
B.automatically convert to controller 2
C.manually select controller 2
[单选题]If pressure regulation fails, the overpressure valve closes
A. When pressure is above 56 psi
B. When pressure is above 68 psi
C. When pressure is above 85 psi
[单选题]Bleed air from engine：
A. is to use cold bleed air of engine fan and it’s cooled by air heat exchanger
B. It’s only cooled by the air of air conditioning
C. It’s cooled by ambient air
[单选题]When engine and APU work, APU bleed valve is selected ON, which of the following is correct?：
A. Engine bleed valve is closed, X bleed valve is closed, and APU bleed valve is open
B. Engine bleed valve is open, X bleed valve is on, and APU bleed valve is closed.
C. Engine bleed valve is closed, X bleed valve is open and APU bleed valve is open.
[单选题]Why select APU bleed ON, just before engine shutdown?
A. To save fuel
B. To prevent passengers feel uncomfortable
C. To prevent engine exhaust fumes from entering the air conditioning
[单选题]According to engine pressure demand, when heating and cooling demand in one zone can’t be satisfied：
A.It must manually increase minimum idle
B.It will automatically increase minimum idle
C.In any case that flight idle can be enough
[单选题]At low engine speed, when the pressure and temperature of the IP air are too low, the system bleeds air from the HP stage and maintains it at:
A. 30±4PSI
B. 32±4PSI
C. 36±4PSI
[单选题]APU bleed page，in this box displays the bleed pressure in amber when ____.
A. the ADIRS1 is not available or selected OFF
B. the data from the ECB are invalid or not transmitted
C. both correct
[单选题]ENG BLEED LEAK（发动机引气漏气）警告和APU BLEED LEAK（APU引气漏气）警告失效，意味着_?故障
A.BMC1
B.BMC2
C.APU 引气
[单选题]APU BLEED灯颜色是
A.蓝色
B.绿色
C.琥珀色
[单选题]Transmission of engine parameters and engine monitoring information to cockpit indicators include:
A. starting system status and primary engine parameter
B. thrust reverser system status and FADEC system status
C. Both of the above.
[单选题]ECAM bleed page controller indicates ALTN MODE,
A. Master control fails (green)
B. Zone controller fails
C. Zone controller operates normally
[单选题]Electrically, the bleed valve is fully closed:
A. The BLEED pushbutton switch (switched OFF), or ENG FIRE pushbutton (pushed)
B. Overtemperature, Overpressure, Leak, Open starter valve and APU bleed being on.
C. All of above
[单选题]Pneumatically, the bleed valve is fully closed:
A. If upstream pressure goes below 8 psi
B. If there is return flow
C. All of above
[单选题]容量为30 VA至100 VA( 包括100 VA)的变压器满负载时，其二次端子电压不得小于端子额定电压 值的()。
A.80％
B.85％
C.90％
D.95％
[单选题]If bleed air temperature is too low during flight, can’t：
A. start APU
B. start engine anti-icing
C. start wing anti-icing
