单项选择题
A.filers B.separators C.ducted traps D.dehumidifiers
A lower thermostatic temperature setting will provide a...
单项选择题A lower thermostatic temperature setting will provide a desired degree of comfort in a room where （）
A.low relative humidity is maintained B.triple banded squirrel cage fans are used C.air circulation is a maximum D.high relative humidity is maintained
To prevent the unnecessary loading of an air conditioni...
单项选择题To prevent the unnecessary loading of an air conditioning system while maintaining the designed dry bulb temperature and relative humidity in an air conditioning system, you should （）
A.admit only enough fresh outside air to provide proper ventilation B.reduce the air reheating system load C.lower the compressor head pressure D.operate the purge recovery unit continuously
To add refrigerant to the low side of an air conditioni...
单项选择题To add refrigerant to the low side of an air conditioning system, the refrigerant should be introduced through the （）
A.suction service valve as a vapor B.suction service valve as a liquid C.discharge service valve as a vapor D.charging valve as a liquid
