單項選擇題

When it is necessary to open a refrigeration system for repairs and the system will be open for more than a few minutes, the open ends of the system should be （）.

A.dehydrated
B.purged
C.plugged
D.evacuated

你可能感興趣的試題

單項選擇題
If an air compressor is used to supply compressed air to outlets throughout the engine room and on deck of a vessel, the system is known as the （）.
A.combustion control air system
B.supply air system
C.ships service air system
D.low pressure deck air system
單項選擇題
The sensible heat of air is dependent upon the （）.
A.dry bulb temperature
B.wet bulb temperature
C.saturation temperature
D.water vapor superheat