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Flame screens are used to ______.
A.contain flammable fumes
B.protect firefightiers from flames
C.prevent flames from entering tanks
D.keep flame and sparks from getting out of an engine’s exhaust system
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单选题Flame screens are used to（）.A
contain flammable fumesB
protect firefighters from flamesC
prevent flames from entering tanksD
keep flames and sparks from getting out of an engine's exhanst system
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单选题An inert gas system on a tanker should be used to（）.A
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dilute tank atmospheres to keep gas concentrations below the lower explosive limitD
prevent fires in the pumproom by continually displacing flammable vapors
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单选题An inert gas system on a tanker should be used to（）.A
prevent the generation of flammable or combustible gas in tanksB
blow out cargo lines to prevent gas concentrationsC
dilute tank atmospheres to keep gas concentrations below the lower explosive limitD
prevent fires in the pumproom by continually displacing flammable vapors
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use black lettering on a white background
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