A minimum of how many gallons of foam concentrate should be carried on each apparatus equipped with a 500 gallon water tank?

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Prepare for the City of Miami Fire Department Driver-Engineer Exam. Review multiple choice questions with hints and explanations. Succeed on your test!

Multiple Choice

A minimum of how many gallons of foam concentrate should be carried on each apparatus equipped with a 500 gallon water tank?

Explanation:
A common foam proportioning target on pumpers with a 500-gallon water tank is 3% foam-to-water. To achieve that ratio, you need about 0.03 × 500 = 15 gallons of concentrate. Carrying at least 15 gallons ensures you can mix foam at the typical 3% concentration with the 500 gallons of water available. Less than that would drop the mix below the desired strength, while more would push the mix above the standard amount and add unnecessary weight. So the minimum to carry is 15 gallons.

A common foam proportioning target on pumpers with a 500-gallon water tank is 3% foam-to-water. To achieve that ratio, you need about 0.03 × 500 = 15 gallons of concentrate. Carrying at least 15 gallons ensures you can mix foam at the typical 3% concentration with the 500 gallons of water available. Less than that would drop the mix below the desired strength, while more would push the mix above the standard amount and add unnecessary weight. So the minimum to carry is 15 gallons.

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