单项选择题
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
Low compression pressure in a diesel engine may be the ...
单项选择题Low compression pressure in a diesel engine may be the result of （）
A.insufficient fuel supply due to fuel pump valves sticking or leaking B.excessive mechanical clearance between the piston crown and cylinder head C.excessively worn fuel pump plunger D.excessive exhaust back pressure
