题目内容

If there is no change of temperature but a change of state ( solid to liquid, liquid to gas, or viceversa) it is called( ) heat.

A. latent
B. sensible
C. surplus
D. waste

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The basic( )cycle makes use of the boiling and condensing of a working fluid at differenttemperatures and, therefore, at different pressures.

A. refrigeration
B. compression
C. propulsion
D. evaporation

A liquid boils and condenses-the change between the liquid and gaseous states -- at a temperature which depends on its( ), within the limits of its freezing point and critical temperature.

A. dew point
B. flow
C. boiling point
D. pressure

( )regulates the refrigerant flows from the high pressure side of the system to the lowpressure side.

A. Condenser
B. The expansion valve
C. Evaporator
D. Compressor

The saturation temperature changes with( )

A. the air density
B. the pressure
C. the present atmospheric pressure
D. surrounding temperature