Which of the following is NOT a foam proportioning method?

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Prepare for the Edmonton Fire Rescue Services 159 Exam. Use flashcards and multiple choice questions, with hints and explanations. Ace your exam!

Multiple Choice

Which of the following is NOT a foam proportioning method?

Explanation:
Foam proportioning is about mixing a foam concentrate with water to create the foam solution at the correct ratio for firefighting. The methods that actually accomplish this mix are injecting the concentrate into the water stream, batch mixing in a dedicated tank before discharge, and induction through a venturi/eductor that draws concentrate into the water flow. Degassing, on the other hand, is the process of removing dissolved gases from a liquid and does not set or achieve the foam concentrate-to-water mixture, so it isn’t used as a foam proportioning method.

Foam proportioning is about mixing a foam concentrate with water to create the foam solution at the correct ratio for firefighting. The methods that actually accomplish this mix are injecting the concentrate into the water stream, batch mixing in a dedicated tank before discharge, and induction through a venturi/eductor that draws concentrate into the water flow. Degassing, on the other hand, is the process of removing dissolved gases from a liquid and does not set or achieve the foam concentrate-to-water mixture, so it isn’t used as a foam proportioning method.

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