Question 164Safety & Environmental - QMED

The correct answer is B) educting mechanical foam through "D" and mixing it with water and air in chamber "E". This is the correct answer because the illustration SF-0020 depicts a fire extinguishing unit that uses a mechanical foam agent. Mechanical foam is created by mixing water, air, and a foam concentrate, which is then discharged through the nozzle. The key element in this process is the "D" port, which would be responsible for educting (drawing in) the mechanical foam concentrate and mixing it with water and air in the "E" chamber before being discharged. The other answer choices are incorrect because they do not accurately describe the mechanism of a mechanical foam fire extinguishing system as shown in the illustration.