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MFRI FIRE 1 EXTINGUISHERS QUESTIONS
WITH DETAILED VERIFIED ANSWERS
Extinguishing Agent Ans: material used to stop the combustion process
incipient stage Ans: those that have not spread beyond the area of
origin
advantages of portable extinguishers Ans: portability, quicker than a
hoseline.
Wet-Chemical extinguisher Ans: used for commercial kitchen fires that
involve cooking oils in deep-fat fryers
Class A Fires Ans: Ordinary Solid combustibles
Class B Fires Ans: Flammable Liquids
class C Fires Ans: Electrical equipment
Class D Fires Ans: Combustible metals
Class K Ans: combustible kitchen oils
Underwriters Laboratories Ans: organization that developed the
standards, classification, and rating system for portable fire
extinguishers.
Letters of classification Ans: classes of fire for which the extinguisher
can be used
Numbers of classification Ans: The extinguishers effectiveness
A and B numerical classification Ans: 1= 1.25 Gallons of use in the
hands of a non-expert user
MFRI FIRE 1 EXTINGUISHERS QUESTIONS
WITH DETAILED VERIFIED ANSWERS
Extinguishing Agent Ans: material used to stop the combustion process
incipient stage Ans: those that have not spread beyond the area of
origin
advantages of portable extinguishers Ans: portability, quicker than a
hoseline.
Wet-Chemical extinguisher Ans: used for commercial kitchen fires that
involve cooking oils in deep-fat fryers
Class A Fires Ans: Ordinary Solid combustibles
Class B Fires Ans: Flammable Liquids
class C Fires Ans: Electrical equipment
Class D Fires Ans: Combustible metals
Class K Ans: combustible kitchen oils
Underwriters Laboratories Ans: organization that developed the
standards, classification, and rating system for portable fire
extinguishers.
Letters of classification Ans: classes of fire for which the extinguisher
can be used
Numbers of classification Ans: The extinguishers effectiveness
A and B numerical classification Ans: 1= 1.25 Gallons of use in the
hands of a non-expert user
