更多"[单选题]X-bleed valve is controlled by"的相关试题:
[单选题]There are two flight guidance modes, namely managed guidance and selected guidance. Which one of them has the priority？
A. Selected guidance
B. Managed guidance
C. They are of the same priority
[单选题]The HP valve closes automatically
A. in case of low upstream pressure
B. in case of excessive upstream pressure
C. All of above
[单选题]Engine LP fuel valve closes when
A. the pressure of fuel pressurization pump descends
B. engine shut-down or engine fire alarm pushbutton out
C. engine fire alarm detection system detects ENG FIRE PUSH
[单选题]An intermediate pressure check valve downstream of the IP, its function is ：
A. to regulate bleed pressure and temperature
B. to prevent air from the HP stage from being circulated to the IP stage
C. at low engine speed, when the pressure and temperature of the IP air are too low, the system bleeds air from the HP stage.
[单选题]Outflow valve indicator on ECAM cabin pressure page turns to amber on the following condition:
A. completely closed
B. completely open in flight
C. Completely open on ground
[单选题]Air outlet valve of pressurization system:
A. It’s controlled by a set of system at a time, and it can’t be converted.
B. It can be converted through the option pushbuttons 1 or 2 on pressurization panel.
C. It can be converted by selecting manual position at least 10 seconds through pressurization panel, and then convert to automatic position.
[单选题]If neither jack is being controlled electrically, both are automatically switched to the ____mode.
A. active
B. damping
C. centering
[单选题]CL and DES are controlled by:
A. altitude selected manually on FCU
B. aircraft weight calculated by FMGC
C. flight planning point (CL top and DES top)
[单选题]If neither jack is being controlled hydraulically, both are automatically switched to______ mode.
A. active
B. damping
C. centering
[填空题]electric insulated joint
[单选题]On what pressure will safety valve open：
A. 8.06psi
B. 8.6psi
C. 9.0psi
[单选题]When engine anti-icing valve opens:
A. Relevant engine N2 reduce
B. N2 increase, engine EPR limit decrease automatically
C. Engine pressure ratio or N2 no change
[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]Flow control valve of air conditioning unit：
A. Pneumatic operation, electric control
B. Electric operation, pneumatic control
C. It will be automatically opened when engine starts
