Which term refers to a master stream permanently mounted on a vehicle?

• A. Master Stream
• B. Deck Guns
• C. Portable Monitors
• D. Ladder Pipe

Answer: (A)

A master stream is a high-flow water stream, but the key idea here is how that stream is delivered. When the big-volume stream is produced by equipment that is permanently mounted on the fire apparatus, that fixed delivery device is called a deck gun. Deck guns are mounted on the vehicle itself (often on top or at the front) and can deliver large flows without moving the hose line.

In contrast, a ladder pipe is mounted on an aerial ladder, which is also a fixed setup but on a different part of the apparatus, while portable monitors are movable devices that can be placed where needed. The general term master stream describes the flow, not the mounting, so the term that specifically denotes a master stream permanently attached to the vehicle is deck gun.