CABIN ATMOSPHERE CONTROL SYSTEMS Flashcards
Which section of a turbine engine provides high pressure bleed air to an air cycle
machine for pressurization and air-conditioning?
Turbine compressor.
At which component in an air cycle cooling system does air undergo a pressure and
temperature drop?
Expansion turbine.
In a freon vapor cycle cooling system, where is cooling air obtained for the
condenser?
Ambient air.
What controls the operation of the cabin pressure regulator?
Cabin altitude.
The basic air cycle cooling system consists of________.
a source of compressed air, heat exchangers, and a turbine.
What component might possibly be damaged if liquid refrigerant is introduced
into,the low side of a vapor cycle cooling system when the pressure is too
high or the outside air temperature is too low?
compressor.
What component in a vapor cycle cooling system would most likely be at fault if a
system would not take a freon charge?
expansion valve.
Frost or ice buildup on a vapor cycle cooling system evaporator would most likely be
caused by___________.
inadequate airflow through the evaporator.
How often should standard weight high pressure oxygen cylinders be hydrostatically
tested?
Every 5years.
What type of oxygen system uses the rebreather bag-type mask?
continuous flow.
The altitude controller maintains cabin altitude by modulation of the…
outflow valve.
Hot compressor bleed air operates the conditioned air system on some turbine
aircraft, how is cold air supplied?
By the air cycle machine turbine.
The main cause of contamination in gaseous oxygen systems is___________.
moisture.
The point at which freon flowing through a vapor cycle cooling system gives up heat
and changes from a gas to a liquid is the_________.
condenser.
What component of a pressurization system prevents the cabin altitude from
becoming higher than airplane altitude?
Negative pressure relief valve.
