A.first to the bottom of the flaming area，sweeping from side to side，and following the flames upward
B.in a circular motion from the middle of the bulkhead outward
C.to the top of the flaming area，sweeping from side to side，and working toward the bottom
D.in an up-and-down motion from one side of the bulkhead to the other
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A.pressure builds up in the nozzle which causes a surge of water
B.the only opening in a passageway is the one from which the nozzle is being advanced
C.pressure in the fire hose drops below 100 psi
D.a bulkhead collapses due to heat and pressure
A.is effective if used promptly on an oil fire
B.has a greater cooling effect than water
C.is lighter than air
D.is harmless to cargo and crew
A.use different fire hose pressures
B.use fire hoses of different sizes
C.not attack the fire from opposite sides
D.not wear protective clothing
A.First aid kit
B.Axe or cutting torch
C.Fire extinguisher
D.Chafing gear
A.When attacking the fire directly
B.When using a steam smothering system
C.When using the fixed CO2 system
D.All of the above
最新試題
When using a high-velocity fog stream in a passageway，the possibility of a blow back must be guarded against. Blow back is most likely to occur when（）.
Which characteristic of Halon is a disadvantage when it is used as a fire extinguishing medium?（）
Which space(s) on your cargo vessel must have a fire detection system?（）
Which portable fire extinguisher should be used on a class C fire on board a vessel?（）
Which fire detection system is actuated by sensing a heat rise in a compartment?（）
When using carbon dioxide to fight a fire on a bulkhead，the CO2 should be applied（）.
Which extinguishing agent is most effective on a mattress fire?（）
When should a fire be ventilated?（）
Which characteristic is an advantage of Halon as a fire extinguishing medium?（）
Which extinguishing agent is recommended in the Chemical Data Guide for use on a carbon disulfide fire?（）