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單項選擇題

If diesel oil in this tank is used, the （） of the oil must not exceed 120 degree F.

A.viscosity
B.flash point
C.acid value
D.temperature

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單項選擇題

Of a kind of liquid is used to cool the diesel engine, it is invariably called （）

A.lubricant
B.coolant
C.combustion product
D.second refrigerant

單項選擇題

If （） are taken at regular intervals, any unequal distribution of load will be easily found out.

A.differential of crank-webs
B.indicator diagrams
C.lube oil reading out
D.misalignment of crank-throws

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