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One purpose of a jet pump in a pressurization and air conditioning system is to
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At which component in an air-cycle cooling system does air undergo a pressure and temperature drop?
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Cabin Atmosphere

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One purpose of a jet pump in a pressurization and air conditioning system is to provide for augmentation of airflow in some areas of the aircraft
At which component in an air-cycle cooling system does air undergo a pressure and temperature drop? expansion turbine
The primary difference between aviation breathing oxygen and other types of commercially available compressed oxygen is that aviation breathing oxygen has had all the water vapor removed
Which of the following are characteristics of a chemical or solid-state oxygen system? A volume storage capacity about three times that of compressed oxygen and system generators that are inert below 400°F, even under severe impact.
The function of the condenser in a freon cooling system is to transfer heat from the freon gas to ambient air
The purpose of a subcooler in a vapor-cycle cooling system is to cool the freon to prevent premature vaporization
Which oxygen system employs a regulator that operates only when the user inhales? continuous-flow system
In an operating vapor-cycle cooling system, if the two lines connected to the expansion valve are essentially the same temperature, what does this indicate? the expansion valve is not metering properly
How often should standard weight high-pressure oxygen cylinders be hydrostatically tested? Every 5 years
In what position should the bottle be placed when adding liquid freon to a vapor-cycle cooling system? Vertical with the outlet at the bottom
Oxygen systems in unpressurized aircraft are generally of the continuous-flow and pressure-demand types
The purpose of the airflow metering aneroid assembly found in oxygen diluter demand regulators is to regulate airflow in relation to cabin altitude when in diluter demand position
After cleaning or replacing the filtering element in a combustion heater fuel system, the system should be pressurized and all connections checked for leaks
For use in pressurized aircraft, which is generally the least complicated and requires the least maintenance? Chemical oxygen generator systems
What controls the operation of the cabin pressure regulator? Cabin altitude
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
When Refrigerant-12 is passed over an open flame, it changes to phosgene gas
The purpose of the dump valve in a pressurized aircraft is to relieve all positive pressure from the cabin
Composite oxygen bottles that conform to DOT-E-8162 have a service life of 15 years or 10.000 filling cycles whichever occurs first
When a vapor-cycle cooling system is not in operation, what is an indication that the system is leaking freon? oil seepage
(Refer to Figure 13.) Determine what unit is located immediately downstream of the expansion valve in a freon refrigeration system. Evaporator coils
In a high-pressure oxygen system, if the pressure reducer fails, what prevents high-pressure oxygen from entering the system downstream? Pressure relief valve
If the liquid level gauge in a vapor-cycle cooling system indicates a low freon charge, the system should be operated for a period of time to reach a stable condition and then the freon level rechecked
To be eligible for recharging, a DOT 3HT oxygen cylinder must have been hydrostatically tested every three years and be retired from service after 24 years or 4,380 filling cycles
When servicing an air conditioning system that has lost all of its freon, it is necessary to check oil and add as necessary, evacuate the system, and add freon
The position of the thermostatic expansion valve in a vapor-cycle cooling system is determined by temperature and pressure of the freon in the outlet of the evaporator
If a high-pressure oxygen cylinder is to be installed in an airplane, it must meet the specifications of the Department of Transportation
Frost or ice buildup on a vapor-cycle cooling system evaporator would most likely be caused by inadequate airflow through the evaporator
Created by: mattpayne001
 

 



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