🔍 Key Concepts

• Difference between fog nozzles and foam-making equipment • How a pickup tube draws liquid from a container to mix with water • What type of agent is typically produced when water mixes with a liquid concentrate and air inside a special nozzle

💭 Think About

• Look closely at the long tube (marked C–D). What is it designed to dip into, and what does that suggest about the kind of agent being produced? • Ask yourself whether a simple fog nozzle would need a separate suction hose and strainer assembly like the one shown. • Consider which of the answer choices normally requires induction and mixing of a liquid concentrate with the fire stream rather than just breaking water into droplets

✅ Before You Answer

• Verify which option refers to an agent created by mixing water, a liquid concentrate, and air. • Check which choices (fog vs. foam vs. light water) are usually made with special inductors and pickup tubes instead of just a nozzle. • Confirm that the equipment in the illustration is not simply a basic fog nozzle but a device for proportioning and mixing another liquid into the fire stream.