单项选择题
The longer the ignition delay period occurs in a diesel engine, the （）.
A.less fuel will enter the cylinder
B.lower will be cylinder compression temperatures
C.more complete will be fuel combustion
D.more rapid will be the rise in combustion pressure
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相关考题
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单项选择题
Poor combustion in a diesel engine can be caused by （）.
A.high compression pressure
B.low intake air temperature
C.low exhaust pressure
D.high scavenge air pressure -
单项选择题
High firing pressures and a low exhaust temperature in a diesel engine may result from （）.
A.decreased piston to cylinder head clearance
B.increased exhaust system back pressure
C.early fuel injection timing
D.low scavenge air temperature -
单项选择题
Whether using a centrifuge or a simple filter, oil cleaning and filtration will be the most effective when the oil is at a （）.
A.high temperature and a high viscosity
B.high temperature and a low viscosity
C.low temperature and a high viscosity
D.low temperature and a low viscosity
