單項(xiàng)選擇題

Some （） lying in the starting air lines will give rise to corrosion and can cause water hammer.

A.air
B.moisture
C.cooling water
D.lubricant

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單項(xiàng)選擇題

During compressors running the accumulated moisture in the separators must be （）.

A.drained off
B.collected
C.sent to the crankcases
D.separated with oil

單項(xiàng)選擇題

By far the greatest use is for diesel engine starting using air pressure of 25 bar or more provided by （）.

A.rotary compressors
B.reciprocating compressors
C.centrifugal compressors
D.screw compressors

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