A.to remove heat from oil cooled pistons
B.to wash away wear detritus
C.to neutralize acidic products
D.all of the above
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A.bearing knocks
B.dropping of pressure of LO
C.noises
D.all the above
A.starting air pressure too high
B.correct timing of starting air valves
C.three of the six starting valves stuck
D.the turning gear disengaged
A.too low starting air pressure
B.main start valve closed
C.neither A nor B
D.A and B
A.The process begins after TDC
B.The process ends before TDC
C.When the piston is near to the TDC the fuel injection ends
D.None of the above is true
A.setting point
B.ash
C.sulfur content
D.carbon residues
最新試題
What causes diesel fuel to be ignited in the cylinder of an operating diesel engine?（）
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The highest pressure in a diesel engine cylinder normally occurs （）.
A thrust bearing is used with a propulsion diesel engine to （）.
The ability of the governor to prevent fluctuations in engine speed is termed （）.
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The function of diesel engine piston compression rings is to （）.
If the water level dropped rapidly in the expansion tank of a closed diesel engine cooling water system, you should suspect a （）.
What is the function of the thrust bearing?（）
The main purpose of the piston oil scraper rings is to （）.