单项选择题
A.the indicators B.the starting valves C.the cylinder lubricators D.the turning gear
Before being used the fuel service tank should be drain...
单项选择题Before being used the fuel service tank should be drained of （）.
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
