By cooling the oil below the ignition temperature
By removing the fuel source from the fire
By excluding the oxygen from the fire
By increasing the weight of the oil
第1题：
The class of fire on which a blanketing effect is essential to extinguish the fire is
A.Class 'A'
B.Class 'B'
C.Class 'C'
D.Class 'D'
第2题：
A foam-type portable fire extinguisher is most useful in fighting a fire in ______.
A.generators
B.oil drums
C.the bridge controls
D.combustible metals
第3题：
One of the limitations of foam as an extinguishing agent is that foam ______.
A.cannot be made with salt water
B.is heavier than oil and sinks below its surface
C.is corrosive and a hazard to fire fighters
D.conducts electricity
第4题：
Never extinguish oil and electrical fires with （）.
第5题：
How does foam extinguish an oil fire ?______.
A.By cooling the oil below the ignition temperature
B.By removing the fuel souce from the fire
C.By excluding the oxygen from the fire
D.By increasing the weight of the oil
第6题：
In the event of a small bunker oil spill on deck occurring while bunkering, you should ____.
A.wash down the area immediately with a fire hose
B.wash down the area with kerosene
C.cover the area with absorbent material
D.cover the area with foam
第7题：
A portable foam (stored-pressure type) fire extinguisher would be most useful in combating a fire in ______.
A.generators
B.oil drums
C.the bridge controls
D.combustible metals
第8题：
The BEST method of applying foam to a fire is to ______.
A.spray directly on the base of the fire
B.flow the foam down a nearby vertical surface
C.sweep the fire with the foam
D.spray directly on the surface of the fire
第9题：
（）extinguish oil and electrical fires with water.
第10题：
turning it upside down
pressing the foam lever
squeezing the grip handle
opening the hose valve