Air System Flashcards
Bleed air is obtained from the ____ & _____ stages of the compressor section of the engine.
() 5th; 9th
() 6th; 10th
() 4th; 12th
5th and 9th
The engine bleed air valve is normally DC power activated and ______ operated.
() pneumatically
() electrically
() hydraulically
pneumatically
What occurs when the BLEED TRIP OFF light illuminates?
() The respective engine bleed air valve must be manually closed
() The respective engine bleed air valve closes automatically
() The APU bleed air valve closes automatically
The respective engine bleed air valve closes automatically
What precools engine bleed air?
() The respective PACK
() A hydraulic heat exchanger
() A precooler, or heat exchanger
A precooler, or heat exchanger
What sources of air can be used to start the engine?
() APU only
() APU, ground air cart, and engine bleed air
() APU, ground air cart, engine bleed air, and ground air conditioning
APU, ground air cart, and engine bleed air
With the isolation valve switch in AUTO, if either an engine bleed air switch or an air conditioning pack switch is positioned OFF, the isolation valve is _____.
() closed
() open
() in transit
open
Does the APU bleed air switch affect the isolation valve position? () Yes
() No
no
Does the APU bleed air valve, on the B737-800, automatically close when the APU is shut down?
() Yes
() No
yes
The APU bleed air valve is___ activated and ______ operated.
() DC; electrically
() DC; pneumatically
() AC; hydraulically
DC; pneumatically
What causes a wing-body overheat condition?
() a fuel pump overheat
() a bleed air duct leak
() a hydraulic leak in the spar
a bleed air duct leak
If a leak in the bleed duct from the APU occurs, which WING-BODY OVER HEAT light will illuminate?
() Left
() Right
() Neither
left
With the ISOLATION VALVE switch in AUTO, the isolation valve _________ if either engine BLEED air or air condition PACK switch is positioned OFF.
() automatically opens
() automatically closes
automatically opens
The Wing-Body Overheat (OVHT) TEST switch _____________.
() tests wing-body overheat detector circuit
() illuminates both WING-BODY OVERHEAT lights
() all answers are correct
all answers are correct
tests wing-body overheat detector circuit
illuminates both WING-BODY OVERHEAT lights
Conditioned air for the cabin comes from _________________.
() either the aircraft air conditioning system or heat exchanger located in the balance bay
() either the aircraft air conditioning system or a preconditioned ground source
() ram air
either the aircraft air conditioning system or a preconditioned ground source
Conditioned air from the ______, upstream of the mix manifold, flows directly to the flight deck.
() left pack
() right pack
() APU pack
left pack
Air from the left pack, air from the right pack, and air from the recirculation system is combined in the ________.
() mix manifold
() aircraft cabin
() the lavatory
mix manifold
With the air conditioning PACK switches in AUTO and both packs are operating _________.
() the packs provide “normal air flow”
() the packs provide “high air flow”
() the left pack provides “normal air flow” and the right pack provides “high air flow”
the packs provide “normal air flow
With the air conditioning PACK switches in AUTO and one pack is operating _________.
() the operating pack provides high air flow
() the operating pack provides low air flow
() the operating pack shuts down above FL250
the operating pack provides high air flow
On the B737 -700, Anytime the pack valve closes, the air mix valves are driven to the _______ position automatically.
() full hot
() full cold
() 20C
Full cold
On the B737 -700, In the automatic temperature mode, the ________ are operated by the automatic temperature controller.
() forward outflow valve
() rear outflow valve
() air mix valves
Air Mix Valves
The ram air system is used to provide cooling for the __________ in the air conditioning systems.
() heat exchangers
() hydraulic pumps
() APU
heat exchangers
The RAM DOOR FULL OPEN light illuminates whenever the ram door is ___________.
() fully open
() fully closed
() partially open
Fully Open
On a B737-700, a DUCT OVERHEAT light causes the appropriate air mix valve to drive ___________.
() full hot
() full cold
() to 20C
Full cold
On the B737-700, when a PACK TRIP OFF light illuminates, the pack valve ________.
() automatically opens and the mix valve drives full cold
() automatically closes and the mix valve drives full cold
() must be manually opened
automatically closes and the mix valve drives full cold