Two main lubricating oil pumps are usu

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

2、Lubricating oil systems are fitted wit

Lubricating oil systems are fitted with a wide variety of strainers some of which can be cleaned in site while others have replaceable cartrid...

3、The removal of （） from lubricating oil

The removal of （） from lubricating oil will reduce engine wear and possible breakdowns.Acontaminating waterBcontaminated additivesCcontaminated fuelDcontaminating impuritie

4、（） fuel oils （） lubricating oils requi

（） fuel oils （） lubricating oils require treatment before passing to the engine.ABoth；andBNeither；norCEither；orDBoth；or

5、Which lubricating oil additive is used

Which lubricating oil additive is used in diesel engines to reduce the tendency for sludge and varnish to form on the engine parts?（）AFlash point improversBPour point improversCInhibitorsDFoam suppressor

6、What are the two main types of stud li

What are the two main types of stud link chain（）.AOil Rig chain and Oil Field Stud Link chainBFlash-butt welded chain and Di-Lok chainCFlash-butt welded chain and Oil Rig chainDOil Field Stud Link chain and Flash-butt welded chai