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單項選擇題

The （） of an oil refers to its ability to mix with water and then release the water in a centrifuge.

A.oxidation resistance
B.carbon-forming tendency
C.demulsibility
D.acidity

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單項選擇題

Obviously, for a given fuel oil, its pour point is （） its cloud point.

A.lower than
B.higher than
C.as same as
D.better than

單項選擇題

The higher the cetane number, （） the ignition quality of the fuel.

A.the worse
B.the better
C.the smaller
D.the greater

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