AS 411 REVIEW QUESTIONS & ANSWERS
Bleed Air - Answers -Air for the ______________ system can be supplied by the
engines, APU, or an external air cart/source.
APU; External Cart - Answers -The _______________ or _______________ supplies
air to the bleed air duct prior to engine start
Engines - Answers -After engine start, air for the bleed air system is normally supplied
by the...
Bleed Air - Answers -The Air conditioning/pressurization system relies on the
_______________ for operation.
Bleed Air - Answers -The Wing and engine thermal anti-icing system relies on the
_______________ for operation.
Bleed Air - Answers -The Engine starting system relies on the _______________ for
operation.
Bleed Air - Answers -The Hydraulic reservoirs pressurization system relies on the
_______________ for operation.
Bleed Air - Answers -The Water tank pressurization system relies on the
_______________ for operation.
Bleed Air - Answers -The Aspirated TAT probe system relies on the _______________
for operation.
APU; Engine - Answers -Switches on the air conditioning panel operate the
_______________ and _______________ bleed air supply system.
5; 9 - Answers -Engine bleed air is obtained from the _____th and _____th stages of
the compressor section.
Insufficient; High; Opens; Pressure - Answers -When 5th stage low pressure bleed air
is ________________ for the bleed air system requirements, the _______________
stage valve modulates _______________ to maintain adequate bleed air
_______________.
5; High; Closed - Answers -During takeoff, climb, and most cruise conditions, low
pressure bleed air from the _____th stage is adequate and the _______________ stage
valve remains _______________.
,Engine Bleed Air Valve - Answers -The ________________ acts as a pressure
regulator and shutoff valve
On; DC; Pressure - Answers -With the engine bleed air switch _______________, the
valve is _______________ activated and _______________ operated.
Engine Bleed Air Valve - Answers -This valve maintains proper system operating
pressure.
Engine Bleed Air Valve - Answers -This valve reduces bleed air outflow in response to
high bleed air temperature.
Bleed Air Trip Sensors - Answers -These sensors illuminate the respective BLEED
TRIP OFF light when engine bleed air temperature or pressure exceeds a
predetermined limit.
Closes - Answers -Upon the Bleed Air Trip Sensor illuminating the respective he
respective BLEED TRIP OFF light the respective engine bleed air valve
_______________ automatically
Duct Pressure Transmitters - Answers -These provide bleed air pressure indications to
the respective (L and R) pointers on the bleed air duct pressure indicator.
Duct Pressure Transmitters - Answers -This indicator is AC operated.
Normal; Sufficient; Pressurization - Answers -Differences between L and R duct
pressure on the bleed air duct pressure indicator are considered _______________ as
long as there is _______________ air for cabin _______________.
Isolation Valve - Answers -This isolates the left and right sides of the bleed air duct
during normal operations.
Isolation Valve - Answers -In addition to the duct pressure transmitters this is also AC
operated.
On; Closed - Answers -With the isolation valve switch in AUTO, both engine bleed air
switches _______________, and both air conditioning pack switches AUTO or HIGH,
the isolation valve is _______________.
Off - Answers -The isolation valve opens if either engine bleed air switch or air
conditioning pack switch is positioned _______________.
True - Answers -(T/F) Isolation valve position is not affected by the APU bleed air
switch.
, External Cart - Answers -Provides an alternate air source for engine start or air
conditioning while on the ground.
APU Bleed Air Valve - Answers -This permits APU bleed air to flow to the bleed air
duct.
APU Bleed Air Valve - Answers -The _________________ closes automatically when
the APU is shut down
DC; Pressure - Answers -The APU bleed air valve is ________________ controlled
and ________________ operated.
Backpressuring; 9 - Answers -With both the APU and engine bleed air valves open,
and the engines operating at idle thrust, there is a possibility of APU bleed air
________________ the _____th stage modulating and shutoff valve.
DUAL BLEED - Answers -The _______________ light illuminates whenever the APU
bleed air valve is open and the position of the engine bleed air switches and isolation
valve would permit possible backpressure of the APU.
True - Answers -(T/F) Thrust must be limited to idle with the DUAL BLEED light
illuminated.
Air Conditioning System - Answers -This system provides temperature controlled air by
processing bleed air from the engines, APU, or a ground air source in air conditioning
packs.
Flight Deck - Answers -Conditioned air from the left pack, upstream of the mix manifold,
flows directly to the _______________.
Excess; Re-circulation; Manifold - Answers -_______________ air from the left pack,
air from the right pack, and air from the _______________ system is combined in the
mix __________________.
Sidewall Risers; Passenger Cabin. - Answers -The air that is mixed in the mix manifold
from the excess air from the left pack, air from the right pack, and air from the
recirculation system is then distributed through the left and right _______________ to
the ________________.
Air Conditioning; Preconditioned Ground - Answers -Conditioned air for the cabin
comes from either the airplane _______________ system or a _______________
source.
Mix Manifold - Answers -Air from the preconditioned ground source enters the air
conditioning system through the...
Bleed Air - Answers -Air for the ______________ system can be supplied by the
engines, APU, or an external air cart/source.
APU; External Cart - Answers -The _______________ or _______________ supplies
air to the bleed air duct prior to engine start
Engines - Answers -After engine start, air for the bleed air system is normally supplied
by the...
Bleed Air - Answers -The Air conditioning/pressurization system relies on the
_______________ for operation.
Bleed Air - Answers -The Wing and engine thermal anti-icing system relies on the
_______________ for operation.
Bleed Air - Answers -The Engine starting system relies on the _______________ for
operation.
Bleed Air - Answers -The Hydraulic reservoirs pressurization system relies on the
_______________ for operation.
Bleed Air - Answers -The Water tank pressurization system relies on the
_______________ for operation.
Bleed Air - Answers -The Aspirated TAT probe system relies on the _______________
for operation.
APU; Engine - Answers -Switches on the air conditioning panel operate the
_______________ and _______________ bleed air supply system.
5; 9 - Answers -Engine bleed air is obtained from the _____th and _____th stages of
the compressor section.
Insufficient; High; Opens; Pressure - Answers -When 5th stage low pressure bleed air
is ________________ for the bleed air system requirements, the _______________
stage valve modulates _______________ to maintain adequate bleed air
_______________.
5; High; Closed - Answers -During takeoff, climb, and most cruise conditions, low
pressure bleed air from the _____th stage is adequate and the _______________ stage
valve remains _______________.
,Engine Bleed Air Valve - Answers -The ________________ acts as a pressure
regulator and shutoff valve
On; DC; Pressure - Answers -With the engine bleed air switch _______________, the
valve is _______________ activated and _______________ operated.
Engine Bleed Air Valve - Answers -This valve maintains proper system operating
pressure.
Engine Bleed Air Valve - Answers -This valve reduces bleed air outflow in response to
high bleed air temperature.
Bleed Air Trip Sensors - Answers -These sensors illuminate the respective BLEED
TRIP OFF light when engine bleed air temperature or pressure exceeds a
predetermined limit.
Closes - Answers -Upon the Bleed Air Trip Sensor illuminating the respective he
respective BLEED TRIP OFF light the respective engine bleed air valve
_______________ automatically
Duct Pressure Transmitters - Answers -These provide bleed air pressure indications to
the respective (L and R) pointers on the bleed air duct pressure indicator.
Duct Pressure Transmitters - Answers -This indicator is AC operated.
Normal; Sufficient; Pressurization - Answers -Differences between L and R duct
pressure on the bleed air duct pressure indicator are considered _______________ as
long as there is _______________ air for cabin _______________.
Isolation Valve - Answers -This isolates the left and right sides of the bleed air duct
during normal operations.
Isolation Valve - Answers -In addition to the duct pressure transmitters this is also AC
operated.
On; Closed - Answers -With the isolation valve switch in AUTO, both engine bleed air
switches _______________, and both air conditioning pack switches AUTO or HIGH,
the isolation valve is _______________.
Off - Answers -The isolation valve opens if either engine bleed air switch or air
conditioning pack switch is positioned _______________.
True - Answers -(T/F) Isolation valve position is not affected by the APU bleed air
switch.
, External Cart - Answers -Provides an alternate air source for engine start or air
conditioning while on the ground.
APU Bleed Air Valve - Answers -This permits APU bleed air to flow to the bleed air
duct.
APU Bleed Air Valve - Answers -The _________________ closes automatically when
the APU is shut down
DC; Pressure - Answers -The APU bleed air valve is ________________ controlled
and ________________ operated.
Backpressuring; 9 - Answers -With both the APU and engine bleed air valves open,
and the engines operating at idle thrust, there is a possibility of APU bleed air
________________ the _____th stage modulating and shutoff valve.
DUAL BLEED - Answers -The _______________ light illuminates whenever the APU
bleed air valve is open and the position of the engine bleed air switches and isolation
valve would permit possible backpressure of the APU.
True - Answers -(T/F) Thrust must be limited to idle with the DUAL BLEED light
illuminated.
Air Conditioning System - Answers -This system provides temperature controlled air by
processing bleed air from the engines, APU, or a ground air source in air conditioning
packs.
Flight Deck - Answers -Conditioned air from the left pack, upstream of the mix manifold,
flows directly to the _______________.
Excess; Re-circulation; Manifold - Answers -_______________ air from the left pack,
air from the right pack, and air from the _______________ system is combined in the
mix __________________.
Sidewall Risers; Passenger Cabin. - Answers -The air that is mixed in the mix manifold
from the excess air from the left pack, air from the right pack, and air from the
recirculation system is then distributed through the left and right _______________ to
the ________________.
Air Conditioning; Preconditioned Ground - Answers -Conditioned air for the cabin
comes from either the airplane _______________ system or a _______________
source.
Mix Manifold - Answers -Air from the preconditioned ground source enters the air
conditioning system through the...
