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------------------------------------------------ Which class of fire extinguisher should be used to extinguish a grease fire in the kitchen, including animal fats and vegetable oils?

a) Class A
b) Class B
c) Class C
d) Class D

A Class B fire extinguisher is used for grease fires involving oils and fats; it is designed to put out flammable liquid fires. Never use water on a grease fire, as it can worsen the situation.

Explanation:

To extinguish a grease fire in the kitchen involving animal fats and vegetable oils, you should use a Class B fire extinguisher. Class B extinguishers are designed for flammable liquid fires such as grease, oil, gasoline, and other chemicals. It's important to remember that water should never be used to put out a grease fire as it can cause the oil to splatter and spread the fire.

Class A extinguishers are intended for ordinary combustibles like wood and paper, Class C for electrical equipment, and Class D for flammable metals. In a kitchen fire involving oils and fats, a class K fire extinguisher, which is a special type of Class B extinguisher, is more suitable for restaurants and commercial kitchens. However, for the purposes of this question, the correct answer is b) Class B.