MOD 5 Flashcards
The largest drop in temperature in an ACM occurs as the air passes through the _____________
expansion tube
Match the vapour cycle system components to their definitions. -Meters out low pressure, low temperature liquid refrigerant. 1.Compressor 2.Condensor 3.Receiver Dryer 4.Thermal Expansion Valve 5.Evaporator
thermal expansion valve
Pressurized aircraft can use cabin ventilation systems
Only when unpressurized
What three instruments are commonly found in large aircraft to monitor the pressurization system?
cabin vsi cabin altimeter cabin differential pressure
Large aircraft outflow valves are controlled by
AC and DC electric motors
Hydrostatic testing is used on
High pressure oxigen bottles
What two heater components are inspected in AD 2004-21-05?
-combustion liner -combustion air pressure switch
the pressure relief valve on the______(50 %)(outflow/safety) valve is set slightly higher than the______(50 %)(outflow/safety) valve
safety, outflow
What is the difference between a shroud style heater and an intensifier tube?
An intensifier tube is mounted inside the exhaust pipe and the shroud is outside the exhaust pipe
The heat required for a liquid to be transformed a vapour is called
latent heat of evaporation
Pilot controlled thermostatic switch
Duct Switch
Normally open thermostatic switch
Purge switch
Used by pilot to latch K-10 relay
Heater Start Switch
on our small to medium sized aircraft pressurization systems, the _____________ valve does most of the work on a normal pressurized flight
outflow
__________________ is caused when there’s not enough pressure to allow the oxygen to be absorbed into the blood.
anoxia
Set at 0.2 psi
Combustion air pressure switch
Overall system safety switch
Overheat Switch
On our small to medium sized aircraft pressurization systems, the outflow valve performs how many functions?
Three
Turns on combustion blower
Off/Vent/Heat Switch
All refrigerant must be converted to a ____________ before entering the compressor
vapour
When the set temperature is reached, K-10 is unlatched
Overheat Switch
All aircraft must be operated with a cabin altitude less than 8000’ True or False
false
Match the vapour cycle system components to their definitions. -Refrigerant enters as high pressure, high temperature vapour and leaves as high pressure, high temperature liquid 1.Compressor 2.Condensor 3.Receiver Dryer 4.Thermal Expansion Valve 5.Evaporator
condensor
What will cause the Heater Fault Light to illuminate?
The Combustion Air Pressure Switch opening
Acts as backup to duct switch
Cycle Switch
Which of the following is not used to provide air to the ACM? 1.APU bleed air 2.Main engine bleed air 3.Ground cart 4.Ram air
Ram air
AD CF90-03R2 requires that a leak test be performed on all exhaust type heaters every year or 150 hours true or false
false
Match the vapour cycle system components to their definitions. -Acts as system reservoir 1.Compressor 2.Condensor 3.Receiver Dryer 4.Thermal Expansion Valve 5.Evaporator
Receiver Dryer
When filling an onboard oxygen bottle we purge the lines by?
allowing a small amount of oxygen to flow through the service line before attaching to the oxygen servicing fitting
_________is caused when there is not enough pressure to allow the oxygen to be absorbed into the blood
anoxia
Match the vapour cycle system components to their definitions. -Drives the refrigerant around the system 1.Compressor 2.Condensor 3.Receiver Dryer 4.Thermal Expansion Valve 5.Evaporator
compressor
Match the vapour cycle system components to their definitions. -Acts as system filter 1.Compressor 2.Condensor 3.Receiver Dryer 4.Thermal Expansion Valve 5.Evaporator
Receiver Dryer
What should be checked before opening the window on the Cessna 185 in flight?
Airspeed
These control the flow of bleed air through the air cycle system
pack valves
When filling an onboard oxygen bottle from a cascade cart, you should start with the supply bottle that:
as the lowest pressure which is above the pressure of the bottle being filled.
ECS does not control what on an aircraft -Cabin air pressure -Cabin air temperature -Cabin air contamination -Cabin air oxygen concentration
-Cabin air oxygen concentration
Adjustable thermostatic switch
Duct Switch
The _____________ valve opens when the depressurization switch is activated on our large aircraft pressurization systems
outflow
AD 2004-21-05 is applicable to:
Combustion air type heaters
How should oxygen generators be made safe for shipping
Lanyard pin removed and safety cap installed
The pressure relief valves on our large aircraft pressurization systems performs how many functions?
one
What malfunction would cause the heater to produce heat only while the heater start switch is pressed and cold air when the heater start switch is released?
K-10 relay not functioning
Maintains the maximum safe temperature for the heater
Cycle Switch
Match the vapour cycle system components to their definitions. -Located in the airflow outside the cabin of the aircraft 1.Compressor 2.Condensor 3.Receiver Dryer 4.Thermal Expansion Valve 5.Evaporator
condensor
1 BTU is required to raise 1 pound of water 1° Celsius. true or false
false 1 BTU is required to raise 1 pound of water 1° fahrenheit.
Prevents overheating when heater is shut down
Purge switch
What component determines heater TIS
Hobbs meter
Match the vapour cycle system components to their definitions. -Cools down the cabin air 1.Compressor 2.Condensor 3.Receiver Dryer 4.Thermal Expansion Valve 5.Evaporator
Evaporator
if a wire is labeled “H12A16”, we can determine that the wire is:
16 gauge
What device in our heater system us useful when troubleshooting an electrical issue?
Terminal block
a bus bar uses a: -non conductive strip -conductive strip
-conductive
The vapour cycle system can be turned off and on by engaging a clutch in the _____________
compressor
In what forms are oxygen stored on an aircraft?
gaseous, chemical (solid), liquid
What causes the cabin altitude to increase on the small to mid sized aircraft pressurization systems?
vacuum is increased causing the outflow valve to open
Oxygen generators can be tested?
no
List three sources for cabin pressurization air
bleed air, turbocharger, supercharger
Maximum cabin differential pressure is -the structural limit of the pressure vessel -the maximum pressure difference allowed between —the outside air and the cabin air. -determined by the aircraft manufacturter -all above
all of the above
What is the purpose of the dump switch?
Depressurization the plane in the event of a malfunction or to remove contaminants
Where is the combustion air pressure switch located?
Downstream of the combustion air blower
to determine the correct pressure to fill an oxygen bottle for a given temperature, we can use a ________ supplied by the manufacturer
chart
when pilots turn on the emergency mode on the diluter-demand oxygen regulator the regulator provides?
100% oxygen under pressure
a diluter oxygen regulator can provide ?
-oxygen mixed with cabin air -100% oxygen -100% oxygen under pressure
Prevents heat from starting if combustion blower is not working
Combustion air pressure switch
A terminal s block is made up of : -non conductive strip -conductive strip
-non conductive strip
what happens if an oxygen bottle pressure becomes too high ?
the pressure relief valve will bleed off the pressure outside after blowing up the green disk
what is G- H -J
G=water separator control valve
H =water drain tube
J= Vernatherm
what is D-E-F
D = Secundary heat exchanger
E =Expantion tube
F= water separator
what is A-B-C
A = Pack Valves
B =Primary Heat exchanger
C= compresor
