单项选择题
Improper cooling of a diesel engine cylinder liner due to the accumulation of scale deposits may cause （）.
A.low compression pressure
B.increased piston wear
C.increased cylinder lube oil consumption
D.poor contact between compression rings and liner
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相关考题
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In describing engine operation, what does the term “cycle” mean?（）
A.The sequence of events that produce a power pulse
B.One rotation of the engine crankshaft
C.One stroke of a piston
D.All of the above -
单项选择题
An advantage of aluminum pistons, when compared to cast iron pistons is （）.
A.greater high temperature strength
B.better heat conductivity
C.greater weight per cubic inch
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单项选择题
Which of the combustion parameters listed is used in a diesel engine, but NOT related to the injection system?（）
A.Atomization
B.Metering
C.Effective stroke
D.Penetration
