A.45
B.60
C.90
D.100
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A.inside micrometer
B.feeler gauge
C.adjustable trammel
D.sighting device
A.starting air and fuel pumps
B.piston cooling pumps
C.exhaust valves
D.all of the above
A two-stroke diesel engine exhaust temperature will be lower than a four-stroke diesel engine of the same displacement because the （）
(1) MEP is lower and the scavenging air is cooling the exhaust gases
(2) valve overlap in a four-stroke
A.(1) only is correct
B.(2) only is correct
C.both (1) and (2) are correct
D.Neither (1) or (2) are correct
A.water
B.babbitt
C.iron or steel
D.acids
A.Impurities
B.Lube oil
C.Gasoline
D.Diesel fuel
最新試題
The highest pressure in a diesel engine cylinder normally occurs （）.
In diesel engines, the four basic events (intake, compression, power and exhaust) are performed once in （）.
When fuel oil has seriously contaminated a diesel engine lubricating oil, you should （）.
Which of the two events listed occurs simultaneously in a two-stroke/cycle diesel engine?（）
What is the function of the thrust bearing?（）
A thrust bearing is used with a propulsion diesel engine to （）.
The function of diesel engine piston compression rings is to （）.
The most important factor in engine performance is the actual power output at the end of the crankshaft available for doing workThis is known as （）.
If a diesel engine is difficult to start and operates with the engine temperatures lower than normal, you should suspect that the （）.
When would the available energy of the exhaust gases of a two-stroke/cycle diesel engine be insufficient to drive an exhaust gas turbocharger, resulting in the incorrect amount of air for combustion?（）