A.low-velocity fog
B.high-velocity fog
C.a straight stream of water
D.foam spray
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A.can not be ignited by a spark unless the vapor is in a confined space
B.are nontoxic in all concentrations
C.can not be ignited by a spark unless they are at their auto-ignition temperature
D.are heavier than air
A.fuel
B.oxygen
C.heat
D.electricity
A.odorless
B.explosive
C.nontoxic
D.visible
A.Pump only if the discharge is led to a shore tank or barge
B.Pump only during the hours of darkness
C.Pump only on the outgoing tide
D.Pump only as much as is necessary
A.sufficient oxygen to sustain human life
B.an explosive mixture in the compartment
C.a toxic atmosphere in the compartment
D.All of the above
最新試題
The condensers located in various stages of a flash evaporator are cooled by（）
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