Essentials of Fire Fighting 7, Chp 6, Section F: Multiple choice Questions & Answers

Which combustible metal is often used in cameras and laptops and can be identified by bright white emissions during the combustion process? A. Lithium B. Titanium C. Potassium D. Magnesium - ANSWERSD. Magnesium Class K rated portable fire extinguishers work because of: A. Cooling B. Smothering C. Saponification D. Chemical flame inhibition - ANSWERSC. Saponification Fires involving lubricating oils and liquefied petroleum gas (LPG) are classified as A. Class A B. Class B C. Class C D. Class D - ANSWERSB. Class B For which classification of fire do portable extinguisher ratings take into account the reactions between the metal and the agent? A. Class A B. Class B C. Class C D. Class D - ANSWERSD. Class D For which method of expelling portable extinguisher contents does the operator apply pressure to a pump that increases the pressure within the container? A. Manual pump B. Stored pressure C. Pressure cartridge D. Semi-automatic pump - ANSWERSA. Manual pump For which method of expelling portable extinguisher contents does compressed air inert gas within the container force agent out a nozzle? A. Manual pump B. Stored pressure C. Pressure cartridge D. Semi-automatic pump - ANSWERSB. Stored pressure What is added to stored-pressure water extinguishers to increase their effectiveness on fires such as deep-seated upholstered furniture fires? A. What chemical agents B. Potassium bicarbonate C. Class B foam concentrate D. Class A foam concentrate - ANSWERSD. Class A foam concentrate Which portable fire extinguisher would be safe to use on energized electrical equipment? A. Stored-pressure water extinguishers B. Water mist stored-pressure extinguishers C. Wet chemical stored-pressure extinguishers D. Aqueous film forming foam (AFFF) extinguishers - ANSWERSB. Water mist stored-pressure extinguishers Which portable fire extinguisher is most effective on static pools of flammable liquids? A. Stored-pressure water extinguishers B. Water mist stored-pressure extinguishers C. Wet chemical stored-pressure extinguishers D Aqueous film forming foam (AFFF) extinguishers - ANSWERSD Aqueous film forming foam (AFFF) extinguishers Which portable fire extinguisher uses gas that displaces available oxygen and smothers the fire? A. Clean agent extinguishers B. Dry powder extinguishers C. Dry chemical extinguishers D. Carbon dioxide extinguishers - ANSWERSD. Carbon dioxide extinguishers Which portable fire extinguisher has a gaseous discharge that usually forms dry ice crystals A. Clean agent extinguishers B. Dry powder extinguishers C. Dry chemical extinguishers D. Carbon dioxide extinguishers - ANSWERSD. Carbon dioxide extinguishers