单项选择题
The adverse effects of burning high sulfur fuel can be compensated for by using a cylinder oil having sufficient（）
A.dispersant additives
B.floc point
C.alkalinity additives
D.ignition quality
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相关考题
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单项选择题
Scuffed cylinder liner surfaces in a diesel engine can result form（）
A.starting the engine hot
B.knurling the piston skirt
C.operating an overheated engine
D.using scuff resistant piston rings -
单项选择题
When comparing different fuels for different engines, the ignition quality of diesel fuel oils becomes a less critical consideration as （）
A.the amount of lube oil additives increase
B.piston speeds increase
C.injection pressure decrease
D.engine speeds decrease -
单项选择题
To reduce the weight of the reciprocating parts, pistons of high-speed engines are made considerably shorterThis results in （）
A.less piston slap and quieter running
B.increased crankshaft bearing wear
C.slightly greater piston wear
D.decreased side pressures
