Question 798 Deck Safety

The correct answer is A) 1-1/2 minutes. When an inline proportioner is used with a water pressure of 100 psi, a 5-gallon can of liquid foam will last approximately 1-1/2 minutes. This is based on the typical flow rate and proportioning ratio of an inline proportioner designed for mechanical foam production. The higher water pressure of 100 psi allows the proportioner to rapidly draw the liquid foam concentrate and mix it with the water, resulting in a shorter duration for a 5-gallon can. The other answer choices are incorrect because: B) 2-1/2 minutes is too long for a 5-gallon can at 100 psi. C) 5 minutes is also too long for a 5-gallon can at 100 psi. D) 15 minutes is significantly too long and not realistic for a 5-gallon can at 100 psi.