题目内容

Proper filtering and straining of diesel fuel is important because the _____.

A. fuel oil pump will over-speed if dirt is not removed
B. fuel oil transfer pumps cannot tolerate small amounts of grit in the oil
C. fuel injectors may be damaged by foreign particles in the fuel oil
D. dirty fuel will clog the intake air filter

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In a typical fuel system, the oil is stored in _____ in the double bottom.

A. setting tanks
B. service tanks
C. storage tanks
D. drain tanks

If diesel oil in this tank is used, the _____ of the oil must not exceed 120 degree℉.

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

Which factor of the followling affects not only the fuel's combustion but also the engine's maintenance?

A. The cetane number.
B. The flash point.
C. The viscosity.
D. The setting point.

Which factor of the followling affects the fuel's combustion?

A. The setting point.
B. The flash point.
C. The cetane number.
D. The mechanical impurities.