A、A.metal particles loosened by wear
B、B.air when no air cleaners are used
C、C.condensation of water vapors
D、D.breakdown of the lubricating oil by dilution
更多“In a normally operating diesel engine, the main cause of lubricating oil contamination in the crankcase is a result of the （）.”相关的问题
A、National Olympiad in Informatics in Provinces B、National Olympiad in Informatics in Profession C、Normal Olympiad in Informaticsin Profession D、Normal Olympiad in Informatics in Provinces
A、have lows lower than normal and highs higher than normal B、have lows higher than normal and highs lower than normal C、are unpredictable D、occur in the spring of the year
A、A.have lows lower than normal and highs higher than normal B、B.have lows higher than normal and highs lower than normal C、C.are unpredictable D、D.occur in the spring of the year
A、maintain higher than normal jacket water temperature B、change the lube oil more frequently than normal C、maintain a higher air-box temperature than normal D、maintain a higher air-box pressure than normal
A、maximum power at a normal load B、maximum power and load under normal conditions C、half speed and normal temperature D、normal operating temperature without a load
A、A.oil foaming in the compressor B、B.higher than normal suction and discharge pressures with a higher box temperature C、C.higher than normal discharge pressure with a normal box temperature D、D.the compressor to run continuously
客服
TOP
查看正确答案
