更多"[单选题]How is the position of air out"的相关试题:
[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
[单选题]About Hot-Air Pressure-Regulating Valve, which one of the following is correct?
A. Electric control and operation by the pushbutton on Air Conditioning Panel.
B. Regulate upstream Hot Air Pressure of the PACK
C. It will automatically open when Trim Air Valve doesn’t work.
[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]When will air inlet bypass valve of skin exchange open?
A. In open-circuit configuration
B. In the forms of open-circuit or intermediate configuration, and air flow is higher than the required value
C. When external temperature of avionics bay is above 35℃（95℉）。
[单选题]How do you indicate the ground air crew to call the pilot in cockpit?
A. One ECAM information shows and a buzzer sounds
B. The MECH lights flash on pilot’s ACP and a buzzer sounds
C. The MECH lights flash on all ACPs and a buzzer sounds
[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]For IAE V2500 A5 engine, what is the max continuous oil temperature?
A. 80℃
B. 155℃
C. 165℃
[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]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]On what pressure will safety valve open：
A. 8.06psi
B. 8.6psi
C. 9.0psi
[单选题]During normal operation, fuel X FEED valve
A. opens when takeoff
B. closes when takeoff
C. Automatic opens by MODE SEL pushbutton
[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]X-bleed valve is controlled by two electric motors: one for automatic mode and one for manual mode, in automatic mode, which of the following is correct?
A. the crossbleed valve opens when the system uses APU bleed air
B. It closes, if the system detects an air leak (except during engine start)
C. All of above
[单选题]The bleed valve, which is downstream of the junction of HP and IP ducting, acts as a shut-off and pressure regulating valve, which of the following is correct about bleed valve?
A. It maintains delivery pressure at 45 ±5 PSI
B. Each bleed valve is pneumatically operated and controlled electrically by its associated BMC
C. All of above
[单选题]When APU supplies air for air-conditioning unit, if zone temperature can’t be satisfied, air-conditioning unit will send signal to ( ) for increasing air flow：
A.Air-conditioning unit ram air inlet
B.APU electric control box
C.Air conditioning unit flow control valve
[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
