IFSTA 7 Essentials Chapter 6 Test Questions And Answers 100% Solved 2024

IFSTA 7 Essentials Chapter 6 Test Questions And Answers 100% Solved 2024 Class A portable fire extinguishers are rated from 1-A through 40-A based upon the amount of water and: - answerduration and range of discharge used in extinguishing test fires. A portable fire extinguisher must be labeled with the: - answerletters and/or symbols that designate its class rating. Class K rated extinguishers work because of _____, which converts fatty acids into a soapy film. - answersaponification When operating a portable fire extinguisher, it is safest to approach the fire: - answerwith the wind at your back. When an extinguishing agent is determined to be safe and effective for use on combustible metals, it will: - answerinclude application instructions on the faceplate. What is a characteristic of carbon dioxide (CO2) extinguishers? - answerCO2 gas displaces oxygen to smother the fire What do manufacturers sometimes add to stored-pressure water extinguishers in order to increase their effectiveness? - answerClass A foam Pump-type water extinguishers are intended primarily for use on: - answerground cover fires The air-aspirating foam nozzle used with an aqueous film forming foam (AFFF) extinguisher produces: - answerhigher quality foam than a standard extinguisher nozzle What is the first step in the PASS application method of operating a portable fire extinguisher? - answerPull the pin to break the thin wire or plastic seal. Portable fire extinguishers are classified according to the: - answertype of fire they are designed to extinguish. A _____ extinguisher requires the operator to apply pressure to a pump that increases pressure within the container and forces the agent out the nozzle. - answermanual pump How does chemical flame inhibition work to extinguish fire? - answerInterrupts the chemical chain reaction in the burning process