單項(xiàng)選擇題Why should you wear a self-contained breathing apparatus before entering the engine room after the fixed CO2 system has been discharged to combat a major fire?（）

A.Because carbon dioxide dilutes the oxygen concentration in the atmosphere and may cause asphyxiation
B.Because carbon dioxide breaks down in a fire into carbon monoxide which may cause blood poisoning in the person breathing this gas
C.Because carbon dioxide is a colorless and odorless gas that becomes highly toxic in the presence of high temperatures and will quickly incapacitate a person exposed to this gas
D.This action is unnecessary as carbon dioxide is not poisonous nor toxic but is a relatively harmless gas


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D.None of the above

2.單項(xiàng)選擇題Fires resulting from spontaneous combustion are usually caused by the improper disposal of（）.

A.cigarette butts
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3.單項(xiàng)選擇題The longer an oil fire is permitted to burn, the （）.

A.harder it is to extinguish
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4.單項(xiàng)選擇題During oil transfer operations, who would be responsible to guarantee that the posted transfer procedures are being followed?（）

A.The designated person in charge
B.The tanker man
C.The senior able seaman
D.The oiler

5.單項(xiàng)選擇題In the event of a fire, the doors to a stair tower must be closed to prevent the spread of fire by （）.

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