单项选择题
A.stopping the main engine suddenly B.changing the main engine running direction suddenly C.the sailing from the shallow water area to the deep water area D.the ship’s trim too much
The oil index of main engine should be controlled to pr...
单项选择题The oil index of main engine should be controlled to prevent it from in heavy weather（）
A.over heat B.over speed C.over pressure D.over worn
A dry-type spark arrestor removes sparks from a diesel ...
单项选择题A dry-type spark arrestor removes sparks from a diesel engine exhaust by（）
A.increasing the linear velocity of the exhaust gases B.changing directions of exhaust gas flow C.decreasing the temperature of the exhaust gases D.accelerating the exhaust gas through a reduced size orifice
When the ship is going to enter into the harbor,（）A.cha...
单项选择题When the ship is going to enter into the harbor,（）
A.change from heavy fuel oil to diesel oil for mail engine B.pumping oil bilge water C.change sea chest form high level one to lower one D.test emergency generator
