题目内容

The dew point is reached when the wet bulb temperature is( )

A. equal to the dry bulb temperature
B. twice the dry bulb temperature
C. less than the dry bulb temperature
D. 50 C above the dry bulb temperature

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The device, which is installed in the compressor suction line to prevent liquid from entering the compressor when hot gas defrosting, is called a( )

A. re-vaporator
B. receiver
C. dehydrator
D. solenoid

( )for cargo spaces and living spaces are normally based on a given number of air changesper hour.

A. Ventilation requirements
B. Air-conditioning
C. Air requirement
D. Air quality

An exhaust fan is commonly installed to avoid excessive( )air pressure in the space.

A. plus
B. negative
C. minus
D. positive

( )may be defined as the process of adding heat to an enclosed space to maintain itstemperature above ambient.

A. Heating
B. Ventilation
C. Dehumidify
D. Refrigeration

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