單項選擇題

The rate of wear on a cylinder liner depends on the （）

A.quality of air filtration
B.effectiveness of lubrication
C.type of fuel used
D.all of the above

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單項選擇題

In diesel engineering practice, the term used to express the ignition quality of a particular fuel is（）

A.cetane number
B.octane number
C.ignition index number
D.volatility point

單項選擇題

The cetane number rates fuels for diesel engines according to its （）

A.antiknock characteristics
B.ignition qualities
C.rates of vaporization
D.viscosity

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