High lube oil temperatures developing in a diesel engine can result from_________.
A.high oil pressure
B.excessive bearing end play
C.plugged oil control rings
D.engine overload
第1题
White smoke exhausting from a diesel engine can result from ________.
A.high exhaust temperature
B.high lube oil temperature
C.low turbo-charger speed
D.low cooling water temperature
第2题
A. High jacket water pressure
B. High lube oil pressure
C. Low lube oil pressure
D. Excessive turbo charger speed
第3题
A.The oil oxidizes and forms carbon deposits
B.The viscosity increases
C.Engine oil consumption decreases
D.Lubricating qualities of the oil are enhanced
第4题
A condition that can increase the foaming tendency of lube oil is ______.
A.excessively high oil temperatures
B.water or moisture contamination
C.fuel dilution
D.life its cylinder relief vales
第5题
A.excessive mist density in the crankcases
B.excessively high crankcase vacuum
C.excessively high bearing temperature
D.excessive carbon buildup in the lube oil
第6题
A.oil foaming will always occur
B.large quantities of oil are consumed
C.lube oil viscosity is always decreased
D.corrosive by-products are usually formed
第7题
A.a dirty lube oil strainer
B.internal water leaks
C.an oil suction line restriction
D.excessive wears of the cooling water pump
第8题
A.corrosive deterioration of a bearing
B.inadequate air filtration
C.excessive ring and liner wear
D.excessive cooling of lubricating oil
第9题
A.run at an irregular speed
B.create high lube oil temperature
C.cause the engine to over-speed
D.cause blue smoke in the exhaust
第10题
Lube oil filters remove contaminants more efficiently if the oil being filtered is _____.
A.under high pressure
B.under low pressure
C.heated to reduce viscosity
D.cooled to increase viscosity
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