Answer :
Final answer:
Both class A and class B foam fire extinguishers can be used to some effect on either class of fire. However, their effectiveness largely depends on the nature of the fire and different types of fires may require specific types of extinguishers.
Explanation:
The correct statement about foam fire extinguishers is that both class A and class B extinguishers may be used to some effect on the other class of fire. This means that under certain circumstances, class A foam extinguishers may be used on class B fires and class B foam extinguishers might be used on class A fires. However, it's important to remember that the effectiveness of an extinguisher largely depends on the nature of the fire and different types of fires may require specific types of extinguishers for best results.For example, a class A foam fire extinguisher is more effective on ordinary combustibles like wood and paper, while a class B foam fire extinguisher is best used on flammable liquids like gasoline or oil.
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