Cabin Atmos Flashcards
(36 cards)
The heat exchanger must be inspected _________ to assure that no _______ will be allowed to flow into the ______
Regularly
Fumes
Cabin
Ventilating ___ ____ around the
combustion chamber will be
______ and sent to the cabin
where needed
Air Flow
Heated
After replacing combustion heater fuel
filter,___ must Pressurize the
combustion heater fuel system and
check for _____
You
Leaks
The expansion valve Regulates the ____
of the _______ according to the temperature of the outlet of the _________
Size
Droplets
Evaporator
When servicing, if the system will not take Freon, look at the ________ _____
Expansion Valve
The cooler air is passed to the ______ ______
Expansion Turbine
The expansion turbine uses air to turn the compressor and lower the pressure which further lowers the air temperature, This is where the ____ _____ __ _______ _______
Last stage of cooling occurs
Turbine powered aircraft uses _____ ___
and ___ ___ and mixes the two to obtain
the required temperature
Bleed Air
Ram Air
In regards to Cabin Pressurization, A pressurization controller uses
• Barometric pressure, which is ______ ______, inside and out
• Cabin Altitude – ______ _____ is in feet
• Cabin rate of climb – or ______ in feet-per-minute
Differential Pressure
Cabin Pressure
Descent
The cabin pressure of an aircraft in flight is maintained at the selected altitude by controlling the rate at which ___ ______ ___ _____
Air leaves the cabin
Aircraft cabin pressurization can be controlled via two different modes of operation, which are they?
• Isobaric mode
• Pressurization (differential) control
mode
In Pressurization control mode, the mode of pressurization
__________ switches from isobaric to
constant differential mode.
This occurs_____ the cabin’s max
differential pressure limit is reached.
• A constant differential pressure is then
_______, regardless of the selected
cabin altitude
Automatically
Before
Maintained
The cabin outflow valve maintains the desired cabin pressure by controlling the cabin pressurization, this is
accomplished through regulating the amount of air that ____ ___ of the cabin
Flows Out
A cabin outflow valve opens, closes, or modulates to establish the amount of
air pressure ______ in the cabin. If the cabin rate of climb is too great the outflow valve should be adjusted to
_____ ______
Maintained
Close Faster
A cabin air _____ _____ is a pressure
relief valve set to open at a
predetermined pressure differential
Safety Valve
What ensures that the air pressure outside the aircraft does not exceed cabin air altitude pressure?
Negative Pressure Relief Valve
A _____-__-_____ switch controls the
position of the pressurization _____ _____, which is held in the open position
until the aircraft takes off
Weight-On-Wheel (WOW)
Safety Valve
Oxygen makes up ___% of the air we
breathe
21
Carbon Monoxide is ______, _____, ______
• Only when it is mixed with other
______can we “______” it
Colorless, odorless, tasteless
Gasses
Smell
MIL-O-21749 OR MIL-O-27210 requires no more than ____ of _____ per liter of
gas, ____ ____ _____
.02ml
Water
Nearly pure oxygen
The main cause of contamination in a
gaseous oxygen system is ________
Moisture
Liquid oxygen is Pale ____, transparent liquid
Blue
Chemical Oxygen generator burns at ___ degrees F when ignited
• In solid state form it will contain about
____ _____ more oxygen than
compressed oxygen
478
Three times
Oxygen generator Inert below ___ °F and can remain
stored with little maintenance
400
