单项选择题
A.soda solution B.mechanical impurities C.ballast D.water and residuals
Before a marine diesel engine is started the cylinders ...
单项选择题Before a marine diesel engine is started the cylinders and pistons must be （）.
A.cooled to appropriate temperature B.warmed up gradually to appropriate temperature C.opened up and renewed D.ground and polished
Before "stand-by" is rung on the engine telegraph, it i...
单项选择题Before "stand-by" is rung on the engine telegraph, it is usual to give the main engine （） ahead and astern.
A.a brief trial with turning gear B.a brief trial on power C.a long trial by steering gear D.one minutes trial with windlass
Bedplates are the （） of the engine, without the support...
单项选择题Bedplates are the （） of the engine, without the support of which the shaft alignment in particular, and engine structure as a whole, would inevitably be lost.
A.hull B.projection C.graphitization D.foundation
