Air Conditioning Flashcards
The ram air doors normally modulate to full OPEN when the aircraft is ____.
in flight with flaps not fully retracted or on the ground
The APU can supply bleed air for the pack up to ____.
17,000 feet or 10,000 feet if the APU is also providing electricity
The mix manifold receives air from the ____.
left pack, right pack, recirculation fan, and pre-conditioned air
What is the primary source of conditioned air for the cockpit?
Left pack
The primary purpose of the recirculation fans is to ____.
reduce air conditioning pack load
Equipment cooling is provided for electronic equipment in the ____.
E & E bay and flight deck area
The equipment cooling system has ___________ fan(s).
2 supply and 2 exhaust
Air from the preconditioned ground source enters the air conditioning system through the ____.
mix manifold
Engine low pressure bleed air is provided by the ____ stage, and engine high pressure bleed air is provided by the ____ stage air.
5th/9th
Each A/C pack has ____ controllers for pack temperature control.
2
If the primary equipment cooling fan fails, what indications would be displayed?
Master Caution light, the related equipment cooling OFF light, and the OVERHEAD annunciator light on the System Annunciator Panel
In the event of a single pack failure at altitude, the remaining pack is capable of maintaining cabin pressure and comfort at an airplane altitude of _____.
41,000 feet
The APU will supply bleed air for ____ pack(s) ____.
one, only in flight
&
both, on the ground
Inflight, normal air conditioning system operation would be ____.
each pack from its associated engine bleed source
Which single bleed source is permitted to supply air to both packs on the ground?
An engine bleed or APU.
The ram air system operates automatically to provide cooling for ____.
the PACK heat exchangers
For maximum cooling (of the pack) the ram air inlet doors modulate toward the _________ .
full open position
Deflector doors on the ram air system are used on the ground to __________.
prevent slush ingestion on takeoff or landing
The deflector doors on the ram air system are fully extended ____.
on the ground only
Zone temperature is controlled by introducing the proper amount of trim air into the______________.
individual zone supply duct
Failure of the primary and standby flight deck zone temperature controls will cause the ____ to illuminate.
ZONE TEMP, MASTER CAUTION, and AIR COND annunciator lights
Inflight, the forward cargo compartment is heated by air drawn around it by the ____.
recirculation fan system
&
equipment cooling system
The temperature selector adjusts the desired zone temperature between a range of approximately ____ degrees.
65-85
When either the primary or standby pack temperature controller fails, what indications will be displayed?
PACK, MASTER CAUTION, and AIR COND SYSTEM ANNUNCIATOR lights on recall
