單項選擇題

If a refrigeration compressor is short cycling on high head pressure, you should （）.

A.purge the condenser if the waterside is dirty
B.check for proper water flow through the condenser
C.increase the high pressure cutout setting
D.reduce the cooling water flow

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單項選擇題

What color is used to indicate the last shot of anchor chain?（）

A.Red
B.White
C.Blue
D.Yellow

單項選擇題

A vacuum is initially created in a flash type distilling plant by（）.

A.the flashing of the feed water
B.the condensation of the saltwater feed
C.air ejectors, eductors, or a separate vacuum pump
D.condensation of the distillate