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單項選擇題

A centrifuge will satisfactorily remove which of the following contaminants from fuel oil?（）

A.Gasoline
B.Water
C.Lubricating oil
D.sulphur compounds

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單項選擇題

Diesel engine ‘blow-by’ into the crankcase is caused by excessive ring（）

A.back clearance
B.side clearance
C.gap clearance
D.taper clearance

單項選擇題

Heavy residual fuel oils are heated prior to centrifuging to （）

A.reduce fuel weight
B.increase specific gravity
C.separate fuel from lube oil
D.reduce fuel viscosity

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