单项选择题
A.leaking delivery valve B.excessive bearing end play C.plugged injector spray hole D.increased plunger stroke
An efficient seal between the cylinder block and cylind...
单项选择题An efficient seal between the cylinder block and cylinder heads on many diesel engines is obtained with（）
A.graphite packing B.sealing compound C.lubricating oil D.gaskets
What is the function of the after-cooler installed in t...
单项选择题What is the function of the after-cooler installed in the diesel engine air intakes system?（）
A.Decrease the air density B.Increase the exhaust temperature C.Decrease the lube oil temperature D.Increase the air density
Which harmful consequence may be the result of lube oil...
单项选择题Which harmful consequence may be the result of lube oil sludge accumulation? （）
A.Clogged oil pump suction screens B.Increased oil operating temperatures C.Sticking piston rings D.All of the above
