The heavy-duty lubricating oil with chemical has been widely introduced in recent years（）
- Aadditives
- Bbehavior
- Ccoolant
- Ddesiccant
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1、If the detergent type lubricating oil
If the detergent type lubricating oil being used in a diesel engine is black, the oil （）Amust be centrifugedBmust by filteredCmust be changedDis holding finely dispersed carbon in suspensio
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2、The removal of （） from lubricating oil
The removal of （） from lubricating oil will reduce engine wear and possible breakdowns.Acontaminating waterBcontaminated additivesCcontaminated fuelDcontaminating impuritie
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3、The ability of lubricating oils to res
The ability of lubricating oils to resist viscosity changes during temperature changes is indicated by the（）AAmerican PetroleumBInstitute number viscosity index numberCSeconds Saybolt Furol numberDSeconds Saybolt Universal number
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4、The remaining oil in the lubricating p
The remaining oil in the lubricating pipes and ducts should be blown out with （）.AatmosphereBthe fresh waterCcompressed airDchemical compound
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5、The selection of a lubricating oil dep
The selection of a lubricating oil depends to a great extent on the operating conditions,（）.Athe type of coolantBthe design of the engineCthe type of fuel to be burnedDB and C
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6、Sludge may form in the lubricating oil
Sludge may form in the lubricating oil crankcase of a reciprocating air conditioning compressor as a result of （）.Awax precipitation in the l...