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.
There are four classes of fire extinguishers â A, B, C and D â and each class can put out a different type of fire. 1  Class A extinguishers will put out fires in ordinary combustibles such as wood and paper. 2  Class B extinguishers are for use on flammable liquids like grease, gasoline and oil.