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FFHB - Chapter 11

True/False
Indicate whether the sentence or statement is true or false.
 

 1. 

Fog nozzles have traditionally operated at 100 psi, but new low pressure nozzles operating at 20 psi have been approved.
 

 2. 

Application rate is the amount of foam needed to extinguish a fire. It is expressed in gallons per minute per square foot.
 

 3. 

A common foam proportioner is an eductor, which works on the venturi principle.
 

Multiple Choice
Identify the letter of the choice that best completes the statement or answers the question.
 

 4. 

A(n) ____ is water or another agent as it leaves the nozzle toward its target, usually the fire.
a.
fire stream
d.
in-line eductor
b.
discharge flow
e.
nozzle reaction
c.
nozzle line
 

 5. 

____ nozzles are capable of providing straight stream and spray patterns, which can by varied or adjusted by the operator.
a.
Solid stream
d.
Wide fog
b.
Fog
e.
None of the above
c.
Combination
 

 6. 

What type of nozzle can be used to fight localized fires in basements when firefighters are unable to make a direct attack on the fire?
a.
a playpipe
d.
an industrial nozzle
b.
a piercing nozzle
e.
a cellar nozzle
c.
a water curtain nozzle
 

 7. 

What is the study of fluids at rest and in motion?
a.
absolute pressure
d.
flow
b.
velocity
e.
friction
c.
hydraulics
 

 8. 

____ is the amount of water flowing from the discharge side of the pump.
a.
Nozzle flow
d.
Discharge flow
b.
Velocity pressure
e.
Nozzle reaction
c.
Pump flow
 

 9. 

Solid stream handlines can reach over ____ feet and master streams about ____ feet.
a.
50, 75
c.
100, 200
b.
50, 100
d.
70, 100
 

 10. 

Adverse conditions that affect fire streams are of two types: ____.
a.
wind and time of day
c.
elevation and pressure
b.
man-made and natural
d.
hose size and hose type
 



 
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