A.Foam
B.Carbon dioxide
C.Dry chemical
D.Water fog
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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
A.Electrically non-conductive
B.Relatively inexpensive
C.Effective against chemicals containing an oxidizer
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（）.
When loading or discharging dry mud or cement，crew members should use facial respirator masks and（）.
Which fire detection system is actuated by sensing a heat rise in a compartment?（）
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Which statement is FALSE concerning precautions during fueling operations?（）
Which fire extinguishing agent has the greatest capacity for absorbing heat?（）
When possible，what is the FIRST step in fighting an engine fuel-pump fire which results from a broken fuel line?（）
Which portable fire extinguisher is normally recharged in a shore facility?（）
When towing astern what equipment should be stowed ready for use near the towline?（）
When must a dry chemical fire extinguisher be recharged?（）