單項選擇題

One of the functions of ventilation is to （） the humidity of spaces containing sources of moisture, or to （） the temperature of spaces not mechanically cooled such as the engine room.

A.increase；reduce
B.reduce；increase
C.increase；increase
D.reduce；reduce

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單項選擇題

Air conditioning is the process of treating air to control （） its temperature, humidity, cleanliness and distribution to meet the comfort requirements of the occupants of the conditioned space.

A.instantaneous
B.instantaneously
C.simultaneous
D.simultaneously

單項選擇題

（）, iea steam cooler, may be filled in the boiler system to control the superheated steam temperature.

A.An economizer
B.An attemperator
C.A water dram
D.A down-comer tube

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