单项选择题
Which of the diesel engine cylinder liners listed has internal cooling water passages?（）
A.Internally finned liner
B.Externally finned liner
C.Wet liner
D.Integral water-jacket liner
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相关考题
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单项选择题
Diesel engine lube oil can become contaminated as a result（）
A.the water produced during combustion
B.the sulfur in the fuel
C.unburned fuel oil
D.all of the above -
单项选择题
If the firing pressures in a diesel engine are high, although the exhaust temperatures are normal, the cause may be（）
A.early injection timing
B.worn orifices in the injection nozzles
C.worn or scored cylinder liners
D.using a fuel with too low of a cetane number -
单项选择题
Scavenging in a turbocharged, four-stroke/cycle diesel engine is accomplished（）
A.during the valve overlap period
B.with only the exhaust valve open
C.at a pressure below atmospheric
D.without cooling the cylinders or pistons
