FAA AMT (Aviation Maintenance Technician) Airframe Practice Exam

Question: 1 / 1030

Where does the last stage of cooling in an air cycle air conditioning system occur?

Compressor

Expansion turbine

The last stage of cooling in an air cycle air conditioning system occurs at the expansion turbine. This is because the expansion turbine is responsible for expanding the high pressure air, causing it to cool down and decrease in temperature. The other options are incorrect because

- Option A, compressor, is responsible for compressing the refrigerant gas, which increases its temperature, rather than cooling it down.

- Option C, condenser, is responsible for transferring the heat from the hot refrigerant gas to the surrounding air, but not for cooling it down.

- Option D, evaporator, is responsible for absorbing the heat from the air in the room, causing the refrigerant to evaporate and cool down, but it is not the last stage of cooling.

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Condenser

Evaporator

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