City of Miami Fire Department Driver-Engineer Practice Test

Fog nozzle pressure is the pressure delivered at the nozzle to create the desired atomized spray and flow. For fog nozzles, the standard value used in many training and practice settings is 75 psi at the nozzle. This pressure provides reliable fog production with good reach without requiring excessive pump discharge. The pump operator sets the discharge to about 75 psi at the nozzle, accounting for hose length and fittings’ friction losses along the line. Lower numbers like 50 psi are typical for smooth-b bore nozzles and won’t produce the same fog pattern, while 30 psi would be too low for proper atomization, and 80 psi isn’t the standard reference used in this context.