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IFSTA Pumper Driver Operator Chapter 7 Exam With Complete Solutions
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IFSTA Pumper Driver Operator Chapter 7 Exam With Complete Solutions...
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IFSTA Pumper Driver Operator Chapter 7 Exam WithComplete Solutions
peripheral-deflect jets are produced by deflecting water from the perimeter of_______ -
ANSWER on inside circular stem in a peripheral-deflected fog nozzle
what is included in a deluge outfit? - ANSWER a short length of large diameter hose with
a large nozzle or large play-pipe supported at the discharge end by a tripod
What type of master stream device cannot change the direction of angle of the stream
while it is discharging water - ANSWER deluge set
Which type of master stream nozzle has plumbed waterways instead of hose - ANSWER
elevated master streams
Which of the following defined as "the line boudning a rounded surface?" - ANSWER
periphery
what type of fog nozzle drives several jets of water together at a set angle to break the
water into fog stream of finely divided particles? - ANSWER impinging stream
which type of fog nozzle supplies the selected flow at the rated nozzle discharge
pressure - ANSWER manually adjustable nozzle
which type of special purpose nozzle produces a very fine, misty fog cone? - ANSWER
chimney nozzle
Fire stream is a - ANSWER stream of water or other extinguishing agent after it leaves a
nozzle until it reaches the desired point
, condition of the stream as it leaves the nozzle is affected by - ANSWER operating
pressure
nozzle design
nozzle adjustment
condition of the nozzle orfice
wide angle of deflection produces a - ANSWER wide angle fog stream
fire stream can be influenced by - ANSWER velocity, gravity, wind, friction with the air
fire service streams - ANSWER solid
fog
brocken
the outlet of a smooth bore nozzle becomes a cylindrical bore whose length is from _____
to ____ times the diameter - ANSWER 1 to 1.5
A smooth finish waterway contributes to both the ____ and ____ of the stream - ANSWER
shape and reach
The pressure ______and _____ of the discharge determine flow and reach from a smooth
bore nozzle - ANSWER Pressure and size of discharge
Smooth bore nozzle formula GPM - ANSWER GPM = 29.7 x D^2 x square root of nozzle
pressure
Stream to break, must be driven against an object with sufficient velocity to _____ and
______ - ANSWER break the surface tension and shatter the mass
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