单项选择题
In the navigation, cause the shafting over load most easily（）
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
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相关考题
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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 -
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 -
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
