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单选题
In engines with system, the lubricating oil can be added to the engine through the filling hole in the crankcase cover, by using a hand oil can, or through the separator pipe（）
A
lubricating oil
B
dry sump
C
circulated tank
D
wet sump
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单选题Care and cleanliness are required when installing diesel fuel filters （）.A
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单选题Auxiliary diesel engines can be automatically shut down as a result of （）A
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单选题On most modern diesel engines, the main and connecting rod bearings receive their lubricating oil by （）.A
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单选题Which of the following will be the function of lubricating oil used in marine engines?（）A
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单选题（） is arranged for cleaning the lubricating oil in the system and clean oil can be provided from a storage tank.A
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main bearingsC
crankpin bearingsD
turboblower
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单选题The oil pressure and flow from each bearings can be checked when（）A
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单选题（） providing lubricating films, oil used in marine diesel engines have to remove heat from oil cooled piston.A
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单选题Lubricating oil systems are fitted with a wide variety of strainers some of which can be cleaned in site while others have replaceable cartridgesThe bold and italic word “which” means （）.A
lubricating oilB
lubricating oil systemsC
strainersD
cartridges
考题
单选题Lubricating oil systems for diesel engine journal bearings are usually lubricated by which of the following types of lubricating oil systems?（）A
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考题
单选题Which lubricating oil additive is used in diesel engines to reduce the tendency for sludge and varnish to form on the engine parts?（）A
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main bearingsB
connecting rod bearingsC
piston pin bushingsD
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单选题Excessive circulation of the lubricating oil with the refrigerant in a refrigeration system will cause （）.A
carbon deposits on the compressor suction valvesB
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no operating problems
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