Flashcards in Test Qs Deck (58)
The passenger oxygen system is supplied by ___________located at each Passenger Service Unit (PSU)
individual chemical oxygen generators
The passenger oxygen system is activated automatically by a pressure switch at a cabin altitude of ______ or when the Passenger Oxygen Switch on the aft overhead panel is positioned to ON.
An illuminated “PASS OXY ON” light on the aft overhead panel indicates:
The passenger oxygen system has been activated
How is the flow of oxygen initiated to the passenger masks?
By pulling any mask in the unit down
Once passenger oxygen is activated, oxygen flows for approximately _____ and cannot be shutoff.
B737-800, bleed air is obtained from the ____ & ____ stages of the compressor section of the engine
B737-800, when 5th low-stage pressure is insufficient, the ___ high-stage valve modulates open to maintain proper pressure
The engine bleed air valve is normally DC power activated and ______ operated.
The illumination of the BLEED TRIP OFF light indicates ________.
engine bleed air temperature or pressure exceeds a predetermined limit
What occurs when the BLEED TRIP OFF light illuminates?
The respective engine bleed air valve closes automatically
What sources of air can be used to start the engine?
APU, ground air cart, and engine bleed air
With the isolation valve switch in AUTO, both engine bleed air switches ON, and both air conditioning pack switches AUTO or HIGH, the isolation valve is _____.
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 _____.
Does the APU bleed air switch affect the isolation valve position?
Does the APU bleed air valve, on the B737-800, automatically close when the APU is shut down?
The APU bleed air valve is___ activated and ______ operated.
With the DUAL BLEED light illuminated, engine thrust must be _______.
limited to idle, if not conducting single engine taxi operations on the ground.
What causes a wing-body overheat condition?
a bleed air duct leak
If a leak in the bleed duct from the APU occurs, which WING-BODY OVER HEAT light will illuminate?
With the ISOLOATION VALVE switch in AUTO, the isolation valve _________ if either engine BLEED air or air condition PACK switch is positioned OFF.
The Wing-Body Overheat (OVHT) TEST switch _____________.
1) Tests wing-body overheat detector circuits
2) Illuminates both WING-BODY OVERHEAT lights
Conditioned air for the cabin comes from _________________.
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.
Air from the left pack, air from the right pack, and air from the recirculation system is combined in the ________.
The APU can supply air for ________ on the ground for all operations
In flight with the air conditioning PACK switches in AUTO and both packs operating, _________.
the packs provide “normal air flow”
Inflight with one PACK operating _________.
the operating pack provides high air flow automatically, if the flaps remain retracted
The ram air system is used to provide cooling for the __________ in the air conditioning systems.
In a B737-800, what happens if an amber ZONE TEMP light illuminates?
the MASTER CAUTION light will illuminate, and the trim air valve closes