A.corrosion fretting
B.insufficient lubrication
C.abnormal wear
D.fatigue failure
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A.sludge
B.water
C.micro-organism growth
D.all of the above
A.burned exhaust valves
B.excessive spring compression
C.spring surge
D.worn valve seats
A.worn valve seats
B.worn main bearing
C.excessive valve clearance
D.weak rocker arm springs
A.spark from a plug in the pre-combustion chamber
B.electrical discharge from the distributor
C.heat of compression within the cylinder
D.heat from the fuel injection nozzle
A.engine operating speed
B.an air manifold
C.a hydraulic distributor
D.individual cams and valve gear
最新試題
Which of the diesel engine components listed increase air density and helps to improve engine operating efficiency?（）
Which of the listed governor characteristics will greatly affect the load sharing relationship between paralleled diesel generators?（）
Under MARPOL Code the ship to which it applies has to carry （）
To shut down a diesel engine after it exceeds the set maximum speed，which type of device listed should be used?（）
Refrigerant entering the compressor of a refrigeration system should be in which of the following conditions?（）
The treatment of the fuel oils involves storage, heating, filtering and（）
Engine parameters shall be corresponded to NOx Technical Files. This is required by （）
Using a file without a handle may result in （）
The cetane rating of diesel fuel is an indication of the （）
（）are used to digest the sewage to produce innocuous sludge in a biological sewage treatment plant.