Portable Fire Extinguishers Chapter 7 Questions and Answers Graded A+

Portable Fire Extinguishers Chapter 7 Questions and Answers Graded A+ Portable fire extinguishers should be chosen based on the: Type of fuel that is burning What classification of portable fire extinguisher is used for fires that involve combustible liquids and gases? Class B What classification of portable fire extinguisher is used for fires that involve combustible metals and alloys? Class D What classification of portable fire extinguisher is used on fires that involve combustible cooking oils? Class K Which method of extinguishing works by excluding oxygen from the burning process? Smothering What expelling mechanism works when the operator physically applies pressure to a pump that increases pressure within the container? Manual pump What type of portable fire extinguisher is intended primarily for ground cover fires? Pump- type water What type of portable fire extinguisher uses air stored in the tank to force water up a siphon tube when operated? Stored- pressure water What type of portable fire extinguisher is intended for use on a Class K fires? Wet chemical stored-pressure The resulting foam from an aqueous film forming foam (AFFF) extinguisher will ___ fuels lighter than air. Float on the surface of What application method is used with an aqueous film forming foam (AFFF) extinguisher in order to prevent disturbing the fuel? Allow foam to gently rain down onto fuel surface What type of portable fire extinguisher is discharged in the form of gas and works on Class B and Class C fires? Carbon dioxide (CO2) What type of portable fire extinguisher may produce a cloud that reduces visibility when discharged? Dry chemical What type of portable fire extinguisher may be applied with either an extinguisher or a scoop? Dry powder What portable fire extinguisher rating is based on the approximate square foot (square meter) area of flammable liquid a non-expert operator can extinguish? Class B rating What portable fire extinguisher rating considers both the toxicity of the extinguishing agent and the toxicity of fumes produced when the agent is applied? Class D rating On a multiple marking extinguisher the rating for each class are: Separate, they do not affect each other. Which statement BEST describes portable fire extinguisher selection? The correct extinguisher will minimize risk to