单项选择题
Which of the following conditions may be attributed to a fouled turbocharger compressor inlet screen or filter?（）
A.Decreasing scavenge air pressure
B.Increasing exhaust temperatures before the turbine
C.Reduction in engine speed
D.All of the above
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单项选择题
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 -
单项选择题
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 -
单项选择题
The cetane number rates fuels for diesel engines according to its （）
A.antiknock characteristics
B.ignition qualities
C.rates of vaporization
D.viscosity
