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ziizii ziizii
wrote...
Posts: 863
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6 years ago
Class A foam extinguishes and/or prevents ignition by:
 
  A. allowing water to penetrate fuels.
  B. creating a barrier between the fuel and the fire.
  C. preventing air from reaching the fuel or mixing with vapors.
  D. lowering the temperature of the fuel and adjacent surfaces.
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6 years ago
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