单项选择题
The exhaust system for a turbocharged diesel engine functions to （）
A.power the after-coolers B.power the turbocharger C.reduce the cylinder scavenge effect D.cool the turbocharger
单项选择题 If the analysis of used lube oil indicates a high content of iron particles, this could indicate（）
单项选择题 Late fuel injection timing is indicated by （）
单项选择题 The process of supplying a diesel engine cylinder with air at a pressure greater than atmospheric is called（）.
