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單項(xiàng)選擇題

The vapors given off by heated fuel oil are heavier than air and are（）.

A.odorless
B.explosive
C.nontoxic
D.visible

單項(xiàng)選擇題

If it becomes necessary to pump bilges while a vessel is in port, which of the following procedures should be followed?（）

A.Pump only if the discharge is led to a shore tank or barge
B.Pump only during the hours of darkness
C.Pump only on the outgoing tide
D.Pump only as much as is necessary

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All of the following are part of the fire triangle EXCEPT （）.

你可能感興趣的試題

The vapors given off by heated fuel oil are heavier than air and are（）.

If it becomes necessary to pump bilges while a vessel is in port, which of the following procedures should be followed?（）