单项选择题
A.Internally finned liner B.Externally finned liner C.Wet liner D.Integral water-jacket liner
Diesel engine lube oil can become contaminated as a res...
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
If the firing pressures in a diesel engine are high, al...
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
Scavenging in a turbocharged, four-stroke/cycle diesel ...
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
