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單項(xiàng)選擇題

The process of removing moisture from air is known as（）.

A.humidification
B.dehumidification
C.vaporization
D.evaporation

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單項(xiàng)選擇題

The heat gained per pound of refrigerant in the evaporator is known as the（）.

A.latent heat of vaporization
B.sensible heat
C.refrigerating effect
D.specific heat of vaporization

單項(xiàng)選擇題

Which of the listed types steam traps operates on the principle that hot water flashes to steam when its vapor pressure is rapidly reduced?（）

A.Ball float
B.Thermostatic
C.Bimetallic
D.Impulse

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