Quiz 6. (10)
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| The charging capacity of a vapor cycle air conditioning system is measured by height, weight, volume | weight
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| Turbine engine air used for air-conditioning and pressurization is generally called? compressed air., ram air., bleed air. | bleed air
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| The two types of air conditioning systems found in modern aircraft can be air cycle machines or vapor cycle systems. True, False | True
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| One purpose of a jet pump in a pressurization and air-conditioning system is to? produce a high pressure for operation of the outflow valve., provide for augmentation of airflow in some areas of the aircraft., assist in the circulation of freon. | The Jet pump:
provide for augmentation of airflow in some areas of the aircraft.
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| In an air cycle air conditioning system, the pneumatic system is supplied with bleed air from the ______________ or ___________. condenser, accumulator, turbocharger, supercharger, engine, APU | engine, APU
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| Vapor cycle air conditioning systems are often used on reciprocating aircraft. True, False | True
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| The _____________________ is the valve that regulates bleed air from the pneumatic manifold into the air cycle air conditioning system? shock valve, pack valve, bypass valve | pack valve
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| How is the air inside a heat exchanger cooled in an air cycle conditioning system? coolant is routed through out the exchanger to cool the air, ---- the thermal expansion valve controls the exchanger temperature, ---- ram air is ducted over the and through the exchanger | ram air is ducted over the and through the exchanger
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| An expansion valve mixes warm bleed air with cold air produced by the air cycle cooling process. True, False | False
separates the low side from the high side
controls the amount of refrigerant sprayed into the evaporator
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| Vapor cycle air conditioning is a closed system in which _________________ is circulated throughout tubing and a variety of components. water, a refrigerant, cooled air | a refrigerant
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| 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, condenser, evaporator | compressor
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| When servicing an air-conditioning system that has lost all of its freon, it is necessary to? 1. check oil and add as necessary, evacuate the system, relieve vacuum, and add freon., 2. check oil and add as necessary, evacuate the system, and add freon., 3. check oil and add as necessary, and add freon. | check oil and add as necessary, evacuate the system, and add freon
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| 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 --- 1. condenser, --2. evaporator, --3. expansion valve | condenser
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| During servicing, a vacuum pump is used to ______________ the pressure in the vapor cycle air conditioning system. --1. increase, -- 2. decrease | decrease
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| The cabin-pressure controller setting has a direct influence upon the? --- 1. pneumatic system pressure., --2. inflow valve opening., --3. outflow valve opening. | outflow valve opening
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| If the liquid level gauge in a vapor-cycle cooling system indicates a low freon charge, the system should? --- 1. be operated and a pressure check performed., -- 2. be operated for a period of time to reach a stable condition and then the freon level rechecked., -- 3. not be operated until freon and oil have been added. | be operated for a period of time to reach a stable condition and then the freon level rechecked
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| The point at which freon flowing through a vapor cycle cooling system absorbs heat and changes from a liquid to a gas is the? condenser, evaporator, expansion valve | evaporator
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| (Refer to Figure 13.) The compressor in this vapor cycle air conditioning system is driven by _____________________ motor driven shaft, a v-belt, electronic controller | a v-belt
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| What is the condition of the refrigerant as it enters the condenser of a vapor-cycle cooling system? High-pressure liquid., Low-pressure liquid., High-pressure vapor. | High-pressure vapor
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