单项选择题
A.The designated person in charge B.The tanker man C.The senior able seaman D.The oiler
In the event of a fire, the doors to a stair tower must...
单项选择题In the event of a fire, the doors to a stair tower must be closed to prevent the spread of fire by （）.
A.convection B.conduction C.radiation D.ventilation
When an oil fire has been extinguished, the surface of ...
单项选择题When an oil fire has been extinguished, the surface of the oil should be kept covered with foam to prevent （）.
A.air from contacting the oil vapors B.permitting re-ignition boiling of the heated oil C.spontaneous combustion below the oil surface D.toxic fumes from escaping to the surface
The process that occurs when heat is generated by a che...
单项选择题The process that occurs when heat is generated by a chemical reaction within a substance and continues to a point of ignition is known as （）.
A.chemical ignition B.spontaneous combustion C.chemical combustion D.radiation ignition
