AS 411 EXAM 4 QUESTIONS & ANSWERS
Which of the following is not a function of the bleed air system? - Answers -Fuel tank
pressurization
Bleed air can be supplied to the aircraft via the APU, an external air cart or the engines.
- Answers -True
An external air cart can supply air for engine start or air conditioning - Answers -True
Bleed air comes from the _____ and ______ compressor stages? - Answers -5th and
9th
Engine bleed air valves are - Answers -DC activated and pressure operated
The bleed air valves protect the system - Answers -by automatically closing when an
over pressure or over temperature is detected
Differences between the L and R duct pressure indicators - Answers -Are considered
normal, as long as the cabin can be pressurized
The isolation valve - Answers -Will be closed during normal operations (both packs
operating, both engine bleeds on)
The APU bleed air valve closes - Answers -Automatically when the APU is shut down
or when the pilot selects the APU bleed air switch to off
The DUAL BLEED light will illuminate when - Answers -The bleed air system is
configured such that it would be possible to put backpressure on the APU
The maximum altitude the APU bleed may be used in flight is________ - Answers -
17,000 feet.
In normal operation the right pack uses bleed air from - Answers -Engine n2
A single pack in high flow can maintain temperatures and pressurization up to -
Answers -FL410
The APU is capable of supplying bleed air for - Answers -2 packs 1 in the air
It is possible to operate two packs from one engine bleed air source but the manual
states it should not be done. - Answers -True
If during cruise flight, both air conditioning pack switches are in AUTO and one pack
fails what will occur? - Answers -The remaining pack will switch to high air flow
Which of the following is not a function of the bleed air system? - Answers -Fuel tank
pressurization
Bleed air can be supplied to the aircraft via the APU, an external air cart or the engines.
- Answers -True
An external air cart can supply air for engine start or air conditioning - Answers -True
Bleed air comes from the _____ and ______ compressor stages? - Answers -5th and
9th
Engine bleed air valves are - Answers -DC activated and pressure operated
The bleed air valves protect the system - Answers -by automatically closing when an
over pressure or over temperature is detected
Differences between the L and R duct pressure indicators - Answers -Are considered
normal, as long as the cabin can be pressurized
The isolation valve - Answers -Will be closed during normal operations (both packs
operating, both engine bleeds on)
The APU bleed air valve closes - Answers -Automatically when the APU is shut down
or when the pilot selects the APU bleed air switch to off
The DUAL BLEED light will illuminate when - Answers -The bleed air system is
configured such that it would be possible to put backpressure on the APU
The maximum altitude the APU bleed may be used in flight is________ - Answers -
17,000 feet.
In normal operation the right pack uses bleed air from - Answers -Engine n2
A single pack in high flow can maintain temperatures and pressurization up to -
Answers -FL410
The APU is capable of supplying bleed air for - Answers -2 packs 1 in the air
It is possible to operate two packs from one engine bleed air source but the manual
states it should not be done. - Answers -True
If during cruise flight, both air conditioning pack switches are in AUTO and one pack
fails what will occur? - Answers -The remaining pack will switch to high air flow
