In a foam concentrate injection system, activation occurs automatically by what event?

In a foam concentrate injection system, activation occurs automatically by what event?

• A. Activation of the main water supply control valve
• B. Manual start by operator
• C. Activation of the foam concentrate feed pump only
• D. Detection device alarm

Answer: (A)

Foam concentrate is added automatically only when there is water flow in the system. When the main water supply control valve opens, water begins to flow through the foam-proportioning device, drawing in foam concentrate and creating the foam solution. This automatic trigger ensures foam is produced only as part of the water stream during system activation. A manual start bypasses automatic operation, and the foam pump alone won’t inject foam without water flow; a detection alarm may alert but doesn’t by itself start the injection.

Foam concentrate is added automatically only when there is water flow in the system. When the main water supply control valve opens, water begins to flow through the foam-proportioning device, drawing in foam concentrate and creating the foam solution. This automatic trigger ensures foam is produced only as part of the water stream during system activation. A manual start bypasses automatic operation, and the foam pump alone won’t inject foam without water flow; a detection alarm may alert but doesn’t by itself start the injection.