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

A.cigarette butts
B.oily rags
C.burner torches
D.lighted matches


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1.單項(xiàng)選擇題The longer an oil fire is permitted to burn, the （）.

A.harder it is to extinguish
B.easier it is to extinguish
C.less chance there is of re-ignition
D.easier it is to control

2.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

3.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 （）.

A.convection
B.conduction
C.radiation
D.ventilation

4.單項(xiàng)選擇題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

5.單項(xiàng)選擇題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