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.
Also see how to buy a fire extinguisher. 1  Class A extinguishers are for ordinary combustible materials such as paper, wood, cardboard, and most plastics.  Class B fires involve flammable or combustible liquids such as gasoline, kerosene, grease and oil.