單項選擇題

The efficiency and output capacity of a low pressure distilling plant will be reduced if the last effect shell （）

A.pressure does not fluctuate rapidly
B.pressure remains steady and unchanged
C.brine density does not exceed 1~5
D.brine density is too low

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單項選擇題

In most pumps and pump motors overpacking the ball bearings full of grease will result in （）

A.moisture emulsification of the bearing grease
B.insufficient circulation and overheating of the bearing
C.proper grease circulation to cool the bearing
D.sliding friction between balls and races

單項選擇題

Aqueous Film Forming Foam (AFFF), commonly known as ‘light water’, is especially suitable for fighting （）

A.oil fires in the engine room bilges
B.class B fires in paint lockers
C.any class D fire
D.all of the above

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The efficiency and output capacity of a low pressure distilling plant will be reduced if the last effect shell （）

你可能感興趣的試題

In most pumps and pump motors overpacking the ball bearings full of grease will result in （）

Aqueous Film Forming Foam (AFFF), commonly known as ‘light water’, is especially suitable for fighting （）

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