Flashcards in Chapter 6 - Hoze Nozzles and Flow Rates Deck (12)
__________, ________ and _______, as well as ___________ affect the condition of the stream as it leaves the nozzle.
Nozzle Design and Adjustment
Condition of the Nozzle Orifice
The fire service operates three types of nozzle to produce three basic fire streams:
Solid, Fog, and Broke Stream
A _________ is produced with a fixed orifice and a smooth bore nozzle.
Solid Fire stream
Solid stream nozzles on handlines should generally be operated at a maximum of ___ psi nozzle pressure, while master stream appliances should be operated at a maximum ___ psi.
Formula to determine the flow of a solid stream nozzle.
GPM = 29.7 x d² x √NP
The reach of the fog stream is directly related to _______, __________, _____, and __________.
The size of the water droplets
The volume of water flowing
Most constant flow nozzles are designed to operate at a nozzle pressure of ___ psi. However, some nozzles may operate at __ or __ psi.
50 or 75 psi.
The three basic types of master stream appliances are _____, _______, and _______.
________ are most often lowered through holes or other openings to the cellar of an occupancy.
Cellar Nozzle (distributors)
_________ are commonly used in aircraft firefighting, car fires, or to apply water to voids, attics, or other areas inaccessible to standard fire streams.
Piercing nozzles (Penetrating nozzle)
Formula to determine nozzle reaction for solid stream nozzles.
NR = 1.57 x d² x NP
NR = Q/3
Q = total flow through the nozzle in gpm.