單項選擇題

Most pump manufacturers recommended that the discharge piping for centrifugal pumps be （）.

A.one size larger than the pump discharge nozzle
B.the same size as the pump discharge nozzle
C.one size smaller than the pump discharge nozzle
D.installed with a short radius elbow at the pump

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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

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

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Most pump manufacturers recommended that the discharge piping for centrifugal pumps be （）.

你可能感興趣的試題

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

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

99色精品-9色在线-99色在线-99色视频国产欧美日产一区二区三区_亚洲精品亚洲人成在线观看_四虎在线精品永久观看_免费一级a一片久久精