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单选题
The wooden plug inserted in the vent of a damaged tank should be removed if you are going to （）.
A
pump from the damaged tank
B
fight a fire
C
abandon ship
D
use the crossover system
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单选题Your vessel is damaged and listing to port. There is a short rolling period around the angle of list. The portside freeboard is reduced to 1 foot. There is no trim and the weather is calm. You should FIRST（）.A
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单选题A wooden plug fitted tightly in the vent of a damaged tank may prevent the tank from（）.A
filling completelyB
developing free surfaceC
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collapsing
考题
单选题Which statement is TRUE concerning protection of double bottom tanks against excessive pressure? （）A
Each vent for the tank must be equal to the area of the tank filling lineB
The tanks must be protected by overflowsC
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jacket water outletB
cooling water pump outletC
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考题
单选题The wooden plug inserted in the vent of a damaged tank of a ship should be removed in case it is decided to（）.A
pump from the damaged tankB
fight a fireC
abandon the rigD
use the crossover system
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