The three nozzle types are?

The three nozzle types are?

• A. Handheld, fixed, and dual
• B. Duct, compliance, and inlet plenum
• C. Fog, spray, and jet
• D. Main, auxiliary, and tertiary

Answer: (B)

The main idea here is understanding where nozzles are used in shipboard fire control and how they’re matched to the ventilation system. In damage control, getting water and agent into the ventilation ductwork is crucial for stopping fires that can spread through air pathways. The three nozzle types are tailored to those key locations: a duct nozzle is designed to be placed inside a duct to blanket the interior surfaces as air moves through, helping to wet and cool the duct walls and prevent flame spread. An inlet plenum nozzle is used at the air intake side of the system, distributing water or foam across the plenum so the entire inlet area—where air first enters the system—gets wet and protected. A compliant or “compliance” nozzle is built to fit varying duct sizes and geometries, delivering a controlled spray that conforms to the interior to maximize coverage without creating dead zones or excessive mist. Together, these three nozzle types cover the main points where you need effective wetting in a ventilation system during a fire. The other options describe spray patterns or generic configurations rather than nozzle types specific to vent ductwork, so they don’t fit as well in this context.

The main idea here is understanding where nozzles are used in shipboard fire control and how they’re matched to the ventilation system. In damage control, getting water and agent into the ventilation ductwork is crucial for stopping fires that can spread through air pathways. The three nozzle types are tailored to those key locations: a duct nozzle is designed to be placed inside a duct to blanket the interior surfaces as air moves through, helping to wet and cool the duct walls and prevent flame spread. An inlet plenum nozzle is used at the air intake side of the system, distributing water or foam across the plenum so the entire inlet area—where air first enters the system—gets wet and protected. A compliant or “compliance” nozzle is built to fit varying duct sizes and geometries, delivering a controlled spray that conforms to the interior to maximize coverage without creating dead zones or excessive mist. Together, these three nozzle types cover the main points where you need effective wetting in a ventilation system during a fire. The other options describe spray patterns or generic configurations rather than nozzle types specific to vent ductwork, so they don’t fit as well in this context.