Rodina Final 2208 Word Scramble

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Question	Answer
Which section of a turbine provides high pressure bleed air to an air cycle machine for pressurization and air conditioning?	High Pressure Compressor
Turbine engine air used for air conditioning and pressurization is generally called	Bleed air
The cabin pressure of an aircraft in flight is maintained at the selected altitude by	controlling the rate at which air leaves the cabin
The purpose of the dump valve in a pressurized aircraft is to relieve	all positive pressure from cabin
How is the cabin pressure of the pressurized aircraft usually controlled	by an automatic outflow valve that dumps all the pressure in excess of the amount for which it is set
on some cabin pressurization systems, pressurization on the ground is restricted by	main landing gear operating switch
the cabin pressure control setting has a direct influence upon the	outflow valve operating
what component of a pressurized system prevents the cabin altitude from becoming higher than airplane altitude	negative pressure relief valve
if the cabin rate of climb is too great, the control should be adjusted to cause the	outflow valve to close faster
which prevents sudden loss of pressurization if there is a loss of pressurization source?	delivery air duct check valve
the primary function of the cabin pressurization system outflow valve is to	maintain the desired cabin altitude
an aircraft pressurization cycle is normally considered to be	one complete series of events or operations that recur regularly
which statement best describes cabin differential pressure	difference between the ambient and internal air pressure
the cabin pressurization modes of operation are	differential, pressurized, and isobaric
a pressurization controller uses	barometric pressure, cabin altitude, and cabin rate of change
the purpose of pressurizing aircraft cabin is to	create the proper environment for prevention of hypoxia, andpermit operation at high altitudes
in the event of failure of bleed air supply forward of valves, what prevents rapid decompression of the aircraft	SOV
if the aircraft takes off from 1500 feet and climbs to and alt of 25k ft with a desired cabin altitude of 7500 ft, what operation is the psi system at 5500 ft?	unpressurized
if the aircraft takes off from 1200 feet and climbs to and alt of 15k ft with a desired cabin altitude of 5k ft, what operation is the psi system at 8500 ft?	isobaric
if the aircraft takes off from 1200 feet and climbs to and alt of 35k ft with a desired cabin altitude of 6500 ft, what operation is the psi system at 35k ft?	Differential
A/C takes of from a field elevation of 1k feet & climbs to 35kft with a desired cabin altitude of 6 ft. Outside atmospheric psi at 1kft is at 14.2psi at 6k ft is 11.8psi & at 35k is 3.46. what would be the required differential prssure at cruise altitude	8.34
if the aircraft takes off from a field elevation of 1k ft with a desired cabin altitude of 6k ft. has a max cabin differential of 5.4 psi what is the max cruising altitude of the aircraft	20,000 feet
if the aircraft has a max cabin differential of 6.75 and takes of from a field elevation of 1k ft with a desired cabin altitude of 8k ft and will be cruising at an altitude of 30k ft what will be the cabin differential if the aircraft climbs 35k ft?	7.44
Usually bleed air from a gas-turbine engine compressor can be safely used for cabin pressurization. Independent cabin condition air machine can be powered by bleed air from an aircraft turbine compressor	Both are true
the dump valve is commonly controlled by the	WOW (weight on wheels)
the pressure in the cabin of an airplane is usually designated as	Cabin altitude instead of pressure
When pressurizing an aircraft on the ground you must	put aircraft in "air mode"
At what maximum altitude do we maintain the cabin of transport category aircraft?	8,000 feet
At certain stages, Hypoxia will cause	dizziness, abnormal speech, and unconsciousness
What ATA chapter will you find pressurization?	21
Where would you find the regulating governing certification of transport category aircraft?	14 CFR Part 25
The safety valve is operated by a seperate controller	False
Outflow vlave on most transport category aircraft are operated by electric motors	True
Turbine Bypass	adds cool air to avoid freezing in the water seperator
Trim Air/ ACM Bypass	Hottest air in the mixing chamber
35 Degree sensor	in the water separator inlet
Water separator	extracts any condensation from the air
Expansion Turbine	Last Stage of cooling
Primary Heat Exchanger	First stage of cooling
Secondary Heat Exchanger	cools air with RAM air before the turbine
ACM Compressor	heats and raises psi of the air
Bleed Air valve	opens to allow engine compressor air to into system
Mixing Chamber	combines air inputs for proper temp into cabin
Ram air inlet	coldest air input into the mixing chamber
ACM	Air Cycle MAchine
ACM oil (specified in AMM)	Servicing the ACM
Zone temp controller	adjust air temp into different cabin zones
Coalescer Bag	cloth sleeve used to catch water droplets
ATA Chapter 21	Air conditioning/ pressurization
ATA Chapter 49	APU
ATA Chapter 36	Pneumatics
ATA Chapter 35	Oxygen
Which 2 aircrafts have "S-Duct"?	727 and L10-11
the function of an APU air inlet plenum is to	stabilize the pressure of the air before it enters the compressor
fuel is normally supplied to the APU from	the airplane's main fuel supply
an APU is usually rotated during start by	an electric starter
when in operation, the speed of an APU occurs when	the bleed air valve is opened
fuel scheduling during APU start and under varying pneumatic bleed and electrical loads is maintained	automatically by the APU fuel control system
usually, most of the load placed on an APU occurs when	the bleed air valve is opened
Frequently, an aircraft's auxiliary power unit (APU) generator	is identical to the engine-driven generators
on APUs equipped with free turbine and load compressor, the primary function of the load compressor is to	Provide bleed air for aircraft pneumatic systems
When necessary, APU engine cooling before shutdown may be accomplished by	closing the bleed air valve
Generally, when maximum APU shaft power is being used in conjunction with pneumatic power	pneumatic loading will be automatically modulated to maintain a safe EGT
how pure is aviators oxygen	99.5%
uses a re-breather bag	continuous flow system
regulators lower the psi to	40-75 psi
demand type	O2 is delivered when user inhales
green	high pressure cylinders
high pressure cylinder psi	1850 psi
stenciled on aircraft O2 bottle	Aviators Breathing Oxygen in 1" white lettering
lowest psi in cylinder before servicing	50 psi
O2 system containment	Moisture
pressure test with water	test to verify serviceability of O2 cylinder
controls the amount of O2 flow in a continuous flow mask	Calibrated orifice
changes high psi cylinder psi to low system psi	Pressure reducer vavle
the diluter is in a diluter demand system	cabin air
visual indication of an over psi condition	green blowout plug on fuselage
DOT 3AA cylinder hydro test psi	5/3 of cylinder capacity
3 components of an aircraft O2 system	Cylinder, Mask, and regulator
high pressure cylinder psi	1800-2000 psi
portable O2 system used for	short flights above 10,000 feet
high storage capacity and low maintenance	chemical O2 advantages
not used on commerical flights	LOX
vented to the blowout plug	pressure relief valve
system in an unpressurized aircraft	continuous flow and pressure demand types
the purpose of the airflow metering aneroid assembly is O2 diluter demand regulator	regulate airflow in relation to cabin altitude
what to do if the system has a leak	bubble test with special solution
tape used to aid in sealing and lubricating threads	teflon
in the vapor cycle cooling system, what is the pressure and state of the refrigerant leaving the evaporator	Low Pressure, Vapor
in the vapor cycle cooling system, what is the pressure and state of the refrigerant leaving the expansion valve	low pressure, liquid
in the vapor cycle cooling system, what is the pressure and state of the refrigerant leaving the condensor	high pressure, liquid
in the vapor cycle cooling system, what is the pressure and state of the refrigerant leaving the compressor	high pressure, vapor
which component in the vapor cycle system stores the refrigerant	receiver-dryer
the expansion valve in the vapor cycle system receives information about the refrigerant temperature and pressure as it leaves which component	evaporator
when servicing a vapor cooling system, evacuation is accomplished by using a vacuum. how is the water removed	lowering the pressure, lowering the boiling point and removing vapor
a small amount of water in a vapor cooling system can freeze in the receiver-dryer and stop the entire system operation...T/F?	False
bubbles in the freon level sight glass indicates	the system needs to be charged
in which component of the vapor cooling system does the system give up heat and change the vapor into liquid	condensor
what is the ventilating air used for on a combustion heater	carries heat to the places where needed
what is combustion air used for on a combustion heater	provides air required to support the flame
where does the exhaust from a combustion heater go	overboard
the combustion heater gets fuel from	the aircraft fuel tank
the ignition system in a combustion heaters is continuous T/F?	True
Transport aircraft used combustion heaters T/F?	False
if there is not enough airflow to keep combustion going what occurs	the ignition will not be activated
when the thermostat reaches the preselected temperature, what occurs	the fuel is shut off to the heater
most single light aircraft use which heating system	exhaust shroud heater
electric heaters are used on transport category aircraft. T/F?	False

Created by: Bertttdavis