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Answer :
Final answer:
The Class B rating of a portable fire extinguisher is based on the area of flammable liquid a nonexpert can extinguish, indicating its effectiveness on fires involving flammable liquids. The correct option is B.
Explanation:
The portable fire extinguisher rating that is based on the approximate square foot area of flammable liquid a nonexpert operator can extinguish is the Class B rating. This rating indicates the extinguisher's effectiveness against fires involving flammable liquids such as gasoline, oil, and paint. The Class B number rating is linked to the approximate square footage a non-expert operator should be able to extinguish.
The National Fire Protection Association (NFPA) Hazard Rating System is not directly related to this portable fire extinguisher rating but is a separate system used by emergency workers to identify chemical hazards at a glance with its diamond-shaped label and color-coded squares that indicate flammability, health hazard, instability, and special hazards.
Understanding the correct type of fire extinguisher to use is critical in emergency situations. Different fire extinguishers are designed for different types of fires, such as Class A for ordinary combustibles, Class B for flammable liquids, Class C for electrical fires, and Class K for kitchen fires involving cooking oils and fats.
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