单项选择题

The ignition quality of diesel fuel is indicated by its（）

A.octane number
B.cetane number
C.viscosity in Saybolt seconds
D.air fuel ratio

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单项选择题

A.Decreasing scavenge air pressure
B.Increasing exhaust temperatures before the turbine
C.Reduction in engine speed
D.All of the above

单项选择题

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

单项选择题

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