Air Conditioning Flashcards
Automatic control of the avionics ventilation system is provided by:
A single Avionics Equipment Ventilation Computer (AEVC).
You can monitor the operation of the avionics ventilation system inlet and extract valves:
On the CAB PRESS page.
To cool avionics ventilation air, the skin heat exchanger:
Uses the temperature of the exterior of the aircraft’s fuselage in certain modes of operation.
The open configuration of the avionics ventilation system:
Uses outside air to ventilate the avionics equipment.
Status of the Avionics Ventilation System may be monitored on the:
CAB PRESS page.
The fwd cargo compartment on some aircraft:
Is heated and ventilated.
Heating, if installed, for the fwd cargo compartment:
- Is provided by a trim air system.
- Is controlled automatically by a cargo heat controller.
- Can be adjusted from the flight deck.
— ALL THE ABOVE —
In the open configuration, the skin heat exchanger isolation valve is ____ and the heat exchanger is ____
closed / bypassed.
If the AEVC senses smoke in the avionics compartment, an Avionics Smoke Caution is generated and after placing the Blower pb and Extract pb to override, the following is accomplished:
- The blower fan stops.
- The inlet valve remains closed, or closes if open.
- The air conditioning inlet valve opens.
— ALL OF THE ABOVE
Unlike the normal operating configurations, the Avionics Smoke Configuration doesn’t occur automatically, and the crew must manually set the Avionics Smoke Configuration by:
Using the Blower pb and Extract pb.
True of False: In the event of a forward cargo compartment overheat condition, or if the Hot Air pb is selected to OFF, the Trim Air Valve closes and airflow to the forward cargo compartment is shut off.
True
The closed configuration of the avionics ventilation system:
- Is used on the ground during cold ambient conditions.
- Is used during flight
- Utilizes the skin heat exchanger.
— ALL OF THE ABOVE —
Once engine bleed air is available to the packs, if pack flow selector is selected to Low, what percentage of normal flow is provided?
80%
HI flow rates are automatically commanded regardless of Pack Flow selector position when:
A. Operating on a single pack
B. The APU is the sole source of bleed air
— Both A and B —
What is the pack outlet temperature?
5 degrees
What is the temperature of the air entering the Forward Cabin zone?
84 degrees
What is the actual temperature of the cockpit?
78 degrees
True of False: The BMC’s have commanded the engine bleed valves closed because the APU Bleed is selected on.
True
Once engine bleed air is available to the packs, if pack flow selector is selected to Low, what percentage of normal flow is provided?
80%
