đ Key Concepts
⢠All-purpose fire hose nozzle positions and their effects on water flow
⢠Difference between solid stream, low velocity fog, and high velocity fog patterns
⢠How handle position usually relates to waterflow ON/OFF and pattern control on standard shipboard nozzles
đ Think About
⢠Look at how the handle moves from position A to B to C. Which direction appears to be opening the nozzle more, and which seems to be shutting it?
⢠Think about which pattern (solid, low velocity fog, high velocity fog, or no water) would logically come first as you begin moving the control from the fully closed position.
⢠On a typical all-purpose nozzle, is the handle straight up more likely to be fully open, partially open, or shut off?
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Before You Answer
⢠Identify which handle position (A, B, or C) most clearly looks like full shutoff and which looks like fully open.
⢠Match the fully open position to the pattern that would use the greatest water volume and pressure at the tip.
⢠Remember that high velocity fog is a tight, powerful spray, while low velocity fog is a wider, softer sprayâconsider which pattern fits best when the nozzle is only partly opened.