A.Alcohol foam
B.Dry chemical
C.Chemical foam
D.Water fog
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A.Foam
B.Carbon dioxide
C.Dry chemical
D.Water fog
A.CO2
B.Foam
C.Dry Chemical
D.Water
A.Dry chemicals
B.CO2
C.Foam
D.All the above
A.Water
B.Sand
C.CO2
D.Dry chemical
A.Leaves a residue
B.Cost，relative to other agents
C.Breaks down while under prolonged storage
D.Conducts electricity
最新試題
When loading or discharging dry mud or cement，crew members should use facial respirator masks and（）.
Which action is routinely performed at the annual servicing and inspection of a dry-chemical cartridge-operated portable fire extinguisher?（）
When using carbon dioxide to fight a fire on a bulkhead，the CO2 should be applied（）.
Which fire extinguishing agent can NOT be used on an ethylenediamine?（）
Which extinguishing agent is NOT recommended in the Chemical Data Guide for use on a cyclohexane fire?（）
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（）.
When water is used to fight a fire on board a ship，the effect of the weight of the water must be taken into account. How much sea water will increase the weight displacement by one ton?（）
Which characteristic is an advantage of Halon as a fire extinguishing medium?（）
Which is a disadvantage of Halon as a fire extinguishing medium?（）
Which extinguishing agent is the best for use on electrical fires?（）