單項(xiàng)選擇題

Routine maintenance on a Central Control Room hermetically sealed air conditioning unit should include （）

A.changing the air filter
B.recharging the system
C.changing compressor lubricant
D.renewing container vacuum

你可能感興趣的試題

單項(xiàng)選擇題

In an air conditioning system, moisture is removed from the air by（）

A.filers
B.separators
C.ducted traps
D.dehumidifiers

單項(xiàng)選擇題

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