單項(xiàng)選擇題By regulation, cargo tanks must be inert before and during what operation?（）.

A.Stripping
B.Loading
C.Cleaning
D.Crude oil washing


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1.單項(xiàng)選擇題By the stowage factor,when given a certain volume of space, we know（）.

A.the space of the ship
B.the space of one ship
C.what kind of cargo can be stowed
D.how much cargo can be stowed

2.單項(xiàng)選擇題Captain said that very clearly so that nobody was in any（）about what was meant?

A.doubt
B.question
C.wonder
D.consideration

3.單項(xiàng)選擇題Carbon dioxide as a fire fighting agent has which advantage over other agents?（）.

A.It causes minimal damage
B.It is safe for personnel
C.It is cheaper
D.It is most effective on a per unit basis

4.單項(xiàng)選擇題Certain cargoes must be segregated because of their（）.

A.inherent characteristics
B.weight
C.destination
D.danger to humans

5.單項(xiàng)選擇題Chafing gear（）.

A.reduces and prevents corrosion of standing rigging
B.prevents corrosion of running rigging
C.reduces and prevents wear caused by the rubbing of one object against another
D.protects the body against extreme cold