单项选择题
A.purge lube oil from the liquid refrigerant
B.recover water purged from the system
C.separate foul gases from the receiver
D.purge non-condensable gases without losing refrigerant
单项选择题 A re-heater, as used in an air conditioning system, is designed to control the （）
单项选择题 Which of the following methods is normally used to control the temperature of air distributed from individual cooling coils in an air conditioning system using a chilled water circulation system?（）
单项选择题 As the amount of moisture in the air increases, the difference between the dry bulb and wet bulb temperature will （）.