Air systems Flashcards
The cabin will be pressurized to approximately 0,1 psid on the ground
automatically when:
a) Engine thrust is increased for takeoff.
b) The FLT/GRD switch is placed to the FLT position.
c) All doors are closed.
d) The engine bleed switches are selected ON.
Engine thrust is increased for takeof
Condition.- Aircraft at cruising altitude, pressurization working in the AUTO mode.
If the aircraft starts climbing and the FLT ALT is not reset, the differential pressure
may rise to a maximum of:
a) 7.90 psi.
b) 8.45 psi.
c) 9.10 psi.
d) 9.45 psi.
8.45 psi.
AUTO mode active. The AUTO FAIL light illuminates when:
a) The cabin attitude exceeds 15.800 ft.
b) The rate of cabin pressure change exceeds 1000 sea level ft./min.
c) The pressurization mode selector is moved to ALTN.
d) The aircraft is descending before the selected altitude was reached.
The cabin attitude exceeds 15.800 ft.
When both the AUTO FAIL light and ALTN light illuminate:
a) Pressurization control has automatically transferred to the standby mode.
b) Pressurization control has automatically transferred to the other automatic controller.
c) Pressurization control has automatically transferred to the manual mode.
d) Pressurization control was not able to transfer to an alternate mode.
b) Pressurization control has automatically transferred to the other automatic controller.
Condition: Both packs operating. Conditioned air from the left pack flows
a) Via the mix manifold to the cockpit and passenger cabin.
b) To the cockpit via the mix manifold.
c) Directly to the cabin and mix manifold.
d) Directly to the cockpit and mix manifold.
d) Directly to the cockpit and mix manifold.
Condition: Both packs operating. Conditioned air from the right pack flows
a) Directly to the passenger cabin.
b) Directly to the cockpit.
c) To the passenger cabin via the mix manifold.
d) To the cockpit via the mix manifold.
c) To the passenger cabin via the mix manifold.
Condition: Right pack operating only. From which source does the cockpit receive
conditioned air?
a) The right air conditioning pack via the mix manifold.
b) It does not receive conditioned air.
c) From the recirculation fan only.
d) Directly from the right air-conditioning pack.
a) The right air conditioning pack via the mix manifold.
What fault condition(s) cannot be reset with the trip reset switch?
a) Bleed trip off.
b) Pack trip off.
c) Wing body overheat.
d) Both b and c.
c) Wing body overheat.
What is the purpose of the recirculation fans?
a) They assist in pressurizing the aircraft.
b) They reduce the temperature of the passenger cabin air.
c) They assist in “fine-tuning” the temperature control of cockpit and cabin.
d) They reduce the air conditioning pack load and the engine bleed air demand.
d) They reduce the air conditioning pack load and the engine bleed air demand.
Where is the recirculation fan air ducted to?
a) The area around the aft cargo compartment.
b) The galley areas.
c) The mix manifold.
d) The air-conditioning packs.
c) The mix manifold.
Condition: In Flight and Left Recirculation fan switch in AUTO. When is the left fan
not operating?
a) When both packs are operating with either pack switch in HIGH.
b) With one pack operating and the associated pack switch in HIGH.
c) When both packs are operating with either pack switch in HIGH and flaps are not
extended.
d) When both packs are operating with either pack switch in HIGH and the gear is not
extended.
a) When both packs are operating with either pack switch in HIGH.
The RAM DOOR FULL OPEN lights:
a) Are illuminated dim when the ram doors are in transit.
b) Will only illuminate in flight with the ram doors full open.
c) Indicate that the ram doors are full open during flight or on the ground.
d) Will only illuminate when the aircraft is on ground. During flight indication is inhibited.
c) Indicate that the ram doors are full open during flight or on the ground.
Which part of the system is overheated when the right ZONE TEMP light is
illuminated?
a) The AFT CAB duct.
b) The CONT CAB duct.
c) The FWD CAB duct.
d) The AFT CAB duct and/or cargo compartment.
a) The AFT CAB duct.
Under which condition(s) in flight is the Overboard Exhaust Valve driven open?
a) If either PACK switch is in high, and the right recirculation fan is off.
b) If either PACK switch is in high, and the left recirculation fan is off.
c) When cabin differential pressure exceeds a certain preset value.
d) In flight with flaps up.
a) If either PACK switch is in high, and the right recirculation fan is off.
Which statement about the forward cargo compartments is true?
a) The forward cargo compartment is not pressurized.
b) The forward cargo compartment is pressurized but does not have fresh air
circulation.
c) The forward cargo compartment is pressurized and has fresh air circulation,
d) The forward cargo compartment is pressurized and an independent temperature
control zone.
b) The forward cargo compartment is pressurized but does not have fresh air
circulation.
.With the pressurization mode selector in the MAN position
a) The outflow valve is controlled by a separate DC motor with the same speed as in
AUTO mode.
b) The outflow valve is controlled by a separate DC motor, slower than in AUTO mode.
c) The outflow valve is controlled by a separate AC motor with the same speed as in
AUTO mode.
d) The outflow valve is controlled by a separate AC motor, slower than in AUTO mode.
b) The outflow valve is controlled by a separate DC motor, slower than in AUTO mode.
Refer to the cabin/flight altitude placard. Cruising at FL 290, the cabin altitude in manual mode should read: a) Approximately 8000 ft. b) Slightly less than FL 200. c) Approximately 6000 ft. d) Cannot be determined by this placard.
c) Approximately 6000 ft.
The amber OFF SCHEDULED DESCENT light illuminates. What does this indicate?
a) The pressure controller is unable to maintain pressurization.
b) The airplane has descended before reaching the preset cruising altitude set in the
FLT ALT indicator
c) The pressurization controller has failed and will automatically shift to ALT mode.
d) All of the above.
The airplane has descended before reaching the preset cruising altitude set in the
FLT ALT indicator
Following an un-pressurized take-off, when is the first engine Bleed switch
selected to ON?
a) Before reaching to 400 ft AGL.
b) After passing 2000 ft AGL.
c) Between 400 ft and 2000 ft AGL.
d) After the number 1 engine bleed switch has been switched to ON.
(PROCEDURES?)
c) Between 400 ft and 2000 ft AGL.
Which systems rely on pneumatics for operation?
a) Air conditioning/pressurization, wing anti ice, fuel tanks.
b) Wing anti ice, APU, engine starting.
c) APU, engine starting, Air-conditioning/pressurization.
d) Engine starting, Air-conditioning/pressurization, Wing and engine thermal anti ice,
hydraulic reservoirs and water tank pressurization.
Engine starting, Air-conditioning/pressurization, Wing and engine thermal anti ice,
hydraulic reservoirs and water tank pressurization.
Which valve has automatically closed when the amber BLEED TRIP OFF light illuminates? a) Modulating and shutoff valve. b) Related engine bleed air valve. c) Isolation valve d) All of the above
Related engine bleed air valve.
What happens to engine fan air that is used to cool engine bleed air?
a) It is ducted to the pneumatic manifold.
b) It is ducted into the crossbleed manifold.
c) It is discharged overboard.
d) It is ducted into the 5th stage compressor.
It is discharged overboard.
When does the amber DUAL BLEED light illuminate?
a) When the APU bleed valve is open and No1 engine bleed valve is closed.
b) When the APU bleed valve is open and No1 engine bleed switch is ON.
c) When the APU bleed valve is open and No2 engine bleed switch is ON and the
isolation valve is open.
d) Both B and C are correct.
d) Both B and C are correct.
What is de position of the isolation valve when the ISOLATION VALVE SWITCH is
in AUTO?
a) The isolation valve is always open.
b) The isolation valve is always closed.
c) The isolation valve automatically modulates between open and closed, depending on
pneumatic load.
d) Open when any engine bleed air switch or air conditioning pack switch is positioned
to OFF.
Open when any engine bleed air switch or air conditioning pack switch is positioned
to OFF
What happens when the WING BODY OVHT TEST switch is pressed?
a) The amber WING BODY OVHT lights illuminate.
b) The amber PACK TRIP OFF lights illuminate.
c) The amber BLEED TRIP OFF lights illuminate.
d) All of the above.
a) The amber WING BODY OVHT lights illuminate.
Engine bleed air valves are:
a) AC activated and pneumatically operated.
b) DC activated and pneumatically operated.
c) AC operated and pressure activated.
d) DC operated and pressure activated.
b) DC activated and pneumatically operated.
TRIM AIR is added to air from the mix manifold to:
a) Reduce pack demand.
b) Help maintain a constant cabin pressure.
c) Control zone temperature.
d) Control pack temperature.
c) Control zone temperature.
The recirculation fans:
a) Are driven by DC motors.
b) Increase airflow at greater cabin differential pressures.
c) Reduce air conditioning pack load.
d) Provide overheat detection downstream of the packs.
c) Reduce air conditioning pack load.
.What causes an amber PACK light to illuminate?
a) A pack trip off.
b) Failure of both primary and standby pack control for the same pack
c) Turning OFF an engine bleed switch.
d) Both A and B are correc
d) Both A and B are correct.
