Which of the following is NOT a nozzle type used in the system?

• A. Duct
• B. Compliance
• C. Inlet plenum
• D. Handheld nozzle

Answer: (D)

This item tests your understanding of fixed, installed nozzle types versus portable handlines. Duct nozzles are used to deliver extinguishing agent inside ductwork, and inlet plenum nozzles are placed at the air intake plenums to protect and treat that space. A compliance nozzle is another fixed nozzle type that serves a specific, integrated role within the system’s design. A handheld nozzle, however, is a portable, manually operated device used with a handline and not part of the fixed installed nozzle types in the system. So the handheld nozzle is not a nozzle type used in the system.