One veteran conservative education reformer describes himself as âfurious and frustratedâ by the increasing dominance of social justice warriors in education reform and the marginalization of dissenting views. âIt's an existential threat,â he notes.
Class A or Ordinary Combustibles ... Class B or Flammable and Combustible Liquids ... Class K for fires that involves combustible or fats cooking oils in well ... â PowerPoint PPT presentation.
Class A fire extinguishers are used on Class A fires, that is, ordinary combustibles such as wood, paper, cloth, rubber and small amounts of plastics. Because it may contai â¦ n conductive water, a Class A should never be used on an any other type of fire -- there could be a dangerous reaction.aking the world better, one answer at a time. Class K fire extinguishers are potassium based, which react chemically with the cooking oil to produce froth. The froth rises from the bottom to the surface, and smothers the fire.