A high velocity fog nozzle will produce the most effective spray pattern when the water pressure is not less than __________.
Official USCG Answer & Rule Citation
Correct Answer: Option A — 100 psi (689.4 kPa)
High velocity water fog nozzles require a minimum operating pressure of 100 psi (689.4 kPa) at the nozzle inlet to atomize droplets effectively, producing the required surface cooling and steam smothering blanket for Class A and B fires.
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