Essentials of Fire Fighting 7- Chp 6, Section F Questions And Answers

Class K rated portable fire extinguishers work because of: A. Cooling B. Smothering C. Saponification D. Chemical flame inhibition - C. 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 - B. 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 - D. Class D For which method of expelling portable extinguisher contents does compressed air inert gas within the container force agent out a nozzle? A. Manual pumpB. Stored pressure C. Pressure cartridge D. Semi-automatic pump - B. Stored pressure 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 - A. Manual pump 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 - D. Class A foam concentrate When using a portable fire extinguisher, apply the agent from a point where it reaches: A. But does not disturb the fuel surface B. And is able to disrupt the fuel surface C. And goes up and over the fuel surface by several feet D. An area that in circles the fire and contains a buffer of several feet - A. But does not disturb the fuel surface 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 - D. Magnesium Which of the following is commonly used dry chemical? A. Hydrofluoric acid B. Sodium bicarbonate C. Potassium hydroxide D. Mono-ammonium Sulfoxide - B. Sodium bicarbonate 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 - D. Carbon dioxide extinguishers