单项选择题
A.clogged coolant passages B.a leaking cylinder head gasket C.low fuel oil pressure D.worn or broken cylinder liner sealing rings
In a four-stroke cycle diesel engine the intake valves ...
单项选择题In a four-stroke cycle diesel engine the intake valves open （）
A.before TDC and close after BDC B.after TDC and close after BDC C.before TDC and close before BDC D.after TDC and close before BDC
Diesel engine air start system check valves are opened ...
单项选择题Diesel engine air start system check valves are opened by （）
A.an air start cam B.cylinder compression pressure C.starting air pressure D.valve springs
For a diesel engine, individual cylinder performance is...
单项选择题For a diesel engine, individual cylinder performance is commonly determined by exhaust gas（）
A.chemical analysis B.back pressure readings C.pyrometer readings D.infrared analysis
