单项选择题
A.after TDC B.before TDC C.after BDC D.before BDC
For an ordinary four-stroke diesel engine the exhaust v...
单项选择题For an ordinary four-stroke diesel engine the exhaust valves close （）.
For a main diesel engine the lube oil in the bearings i...
单项选择题For a main diesel engine the lube oil in the bearings is drawn from （）, usually located in the bedplate.
A.a gravity tank B.a sump C.a vessel D.a bottle
For a generator engine, after passing through the turbi...
单项选择题For a generator engine, after passing through the turbine the exhaust gas may be conducted out into the （）.
A.intercooler B.open air C.oil fired boiler D.B and C
