Air Conditioning Flashcards
T or F: the air conditioning packs cool the hot bleed air prior to it entering the flight compartment and passenger cabin.
True.
T or F: there are two turbine shutoff valves on the Q400, one for each pack.
True.
T or F: within the air cycle machine, there is a primary and a secondary heat exchanger.
True.
The air conditioning system can receive bleed air from what sources?
Engines and APU.
T or F: bleed air can be used from the APU and engines at the same time.
False.
T or F: the ECU modulates the pack flow control and shutoff valve position based on air conditioning control panel settings.
True.
T or F: of only one pack is operational, air flow will be reduced.
True, to approximately 70% of flow selection.
How many different positions do the pack switches have?
Three: off, manual, auto.
If the pack FCSOV malfunctions, it defaults to which of the following positions?
Open.
If bleed air from the engines is unavailable in flight, where does the air come from for cabin ventilation?
Outside ram air through a NACA vent on the dorsal fin.
Where is the vent that allows ram air to enter the aircraft for the air conditioning system located?
The dorsal fin.
When both packs are operating, what is the distribution of the air for the flightdeck and passenger cabin?
25% flight deck, 75% cabin.
When the temperature control is set to full warm, it targets what specific temperature?
27ºC/80ºF.
When the temperature control is set to full cool, it targets what specific temperature?
15ºC/60ºF.
How many fans must fail before a message illuminates on the ED?
Two.
