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
单项选择题 For a generator engine, after passing through the turbine the exhaust gas may be conducted out into the （）.
单项选择题 For a diesel engine, when the piston is at the （）, the clearance volume is the largest.
单项选择题 Fix the fuel injector into （） after repair.
