A、A.increased carbon buildup
B、B.burning of intake valves
C、C.excessive firing pressures
D、D.increased fuel consumption
更多“What harmful condition can result if a diesel engine is operated at very light loads for long periods of time?（）”相关的问题
A、A.more harmful to sea life than lighter oils B、B.easier to clean up than lighter refined oils C、C.less harmful to sea life than lighter oils D、D.not a real threat to marine life
A、It causes excessive smoking and soot at low firing rates B、It doesn’t readily burn when combined with oxygen C、It clogs fuel oil strainers more often D、It forms a corrosive acid when mixed with water or water vapor
A、any transmission B、any harmful transmission C、to use radiotelephone D、using radiotelephone
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