A.Dirty lube oil filter
B.Too much piston ring wear
C.High lube oil viscosity
D.Low lube oil temperature
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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
A.pitting
B.sludge
C.hard varnish
D.all of the above
A.increase ignition delay
B.affect fuel oil metering
C.affect engine performance at low speed
D.only disappear due to fuel oil abrasion
A.oil foaming will occur
B.large quantities of oil are consumed
C.lube oil viscosity is always decreased
D.corrosive by-products are usually formed
A.keep the parts immersed in diesel fuel
B.always keep the plunger and barrel together
C.work over a linoleum-type surface
D.all of the above
最新試題
Using a file without a handle may result in （）
During the diesel engine running, the water level of F.W expansion tank should normally kept in the （） level of glass tube.
Refrigerant entering the compressor of a refrigeration system should be in which of the following conditions?（）
Thermostatic steam pressure reducing valves are used in the fuel oil service system to control the（）
（） is not installed on the main switchboar.
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Cold weather starting of a diesel engine may be made easier by（）