Nozzles, Fire Streams and Foam Rapid Fire Questions
What position should the nozzleman hold the nozzle when waiting to move into a burning room?
Up and in the ready position
2. At sea level what is the atmospheric pressure?
A.) 13.3 psi
B.) 14.5 psi
C.) 14.7 psi
D.) 13.1 psi
Which type of attack combined with ventilation is the typical attack in structural firefighting?
Which special purpose nozzle is designed to spray water to protect against exposure to heat?
A.) Water curtain
D.) Bresnan distributor
What happens when the gallonage and pattern are adjustedon the fog nozzle that makes the changes detectable in the dark?
C.) Lights up
Which type of foam application is made from natural protein materials, such as animal blood?
A.) Fluoroprotein film-forming
Which type of friction loss occurs when water moves through the valves and turns of the ladder pipe?
Which foam application technique involves the foam striking the ground before the fire and rolling into the fire?
Which principle of friction loss with all other variable sheld constant is NOT correct?
A.) For any given velocity, the friction loss will be aboutthe same regardless of the water pressure
B.) Friction loss varies approximately with the cube of theflow
C.) Friction loss will decrease as the size of the hosediameter gets larger
D.) Friction loss varies directly with the length of the hose
Friction loss varies approximately with the cube of theflow
Which is most likely the most commonly used polar solvent?
B.) Methyl alcohol
D.) Ethyl alcohol
Who adjusts the spray pattern of the fog nozzle?
B.) Pump operator
C.) Engine driver
D.) Hose layer
Where is the air normally added into the foam solution to finish making it?
A.) In the hoseline
B.) At the nozzle
C.) In the eductor
D.) At the pump
At the nozzle
What determines the friction loss within the hoseline?
A.) Source of the water
B.) Temperature of the water
C.) Speed of the water
D.) Pressure of the water
Speed of the water
How much water can the medium-diameter handline flow?
A.) 235 to 375 gpm
B.) 145 to 300 gpm
C.) 165 to 325 gpm
D.) 275 to 465 gpm
165 to 325 gpm
With which class of foam is the compressed air foam system used?
A.) Class B
B.) Class C
C.) Class A
D.) Class D
Which element does NOT affect the fire stream?
Which type of foam is used to full up entire areas such as mine shafts or buildings?
A.) Detergent-type foam
B.) Alcohol-resistant foam
C.) Film-forming foam
D.) Protein foam
At what angle is the maximum horizontal reach achieved?
A.) 65 degrees
B.) 32 degrees
C.) 28 degrees
D.) 70 degrees
Which characteristic is available with aqueous filmforming foam?
A.) Faster knockdown time
B.) Increased heat resistance
C.) Higher vapor suppression
D.) Greater fuel tolerance
Faster knockdown time
What must the straight stream pass around in the fog nozzle that causes air to be introduced into the stream?
Which type of eductor is always piped through the venturi?
What size fog nozzle moves more air than a 24-inch smoke ejector?
A.) 1 1/2-inch
D.) 2 1/2-inch
How many flow choices does the nozzleperson have to chose from with the selectable gallonage nozzle?
A.) 4 or 5
B.) 2 or 3
C.) 3 or 4
D.) 1 or 2
2 or 3
At what pressure (psi) have fog nozzles traditionally operated?
What must be added to the foam mixture to complete the process?
How many times its volume does water expand when converted to steam?
A.) 1,700 to 1,800
B.) 1,200 to 1,300
C.) 1,600 to 1,700
D.) 1,400 to 1,500
1,600 to 1,700
Which measures the pressure at the bottom of a column of water in feet?
What size fog nozzle moves more air than a 14-inch smoke ejector?
B.) Booster line
D.) 1 1/2-inch
About how far can the straight master stream reach?
A.) 70 feet
B.) 100 feet
C.) 140 feet
D.) 200 feet
Which NFPA standard has recommended application rates for foam?
What is a quick fireground formula for calculating the nozzle reaction of a fog nozzle operating with a nozzle pressure of 100 psi?
A.) It is one-fourth the gpm
B.) It is one-eighth the gpm
C.) It is one-third the gpm
D.) It is one-half the gpm
It is one-half the gpm
What is the maximum air to solution ratio of low expansion foam?
How many firefighters are required to operate a hose line that is flowing 100 gpm?
Which type of nozzle do many firefighters consider more effective?
A.) Solid tip
B.) Smooth bore
C.) Solid stream
How many firefighters are needed to operate master streams that can flow over 350 gpm?
What is the major natural factor affecting fire stream?
Which is an advantage of the solid stream?
A.) Increased fog protection when working close to the fire
B.) Good penetration into burning piles of materials
C.) Amount of volume control
D.) Lower nozzle reaction at the same pressure as a fog nozzle
Good penetration into burning piles of materials
What is the extinguishing agent that leaves the nozzle and flows toward its target?
A.) Smoke stream
B.) Agent stream
C.) Fire stream
D.) Nozzle stream
How many spray nozzles does the cellar nozzle have?
What is the upper limit of the air to solution ratio of high expansion foam?
What is the nozzle pressure (psi) of the fog masterstream?
Which is the flow from all outlets from the pump or the total gallons per minute?
A.) Available flow
B.) Needed flow
C.) Required flow
D.) Discharge flow
How much elevation pressure is accounted for per floor when pumping water up or down in a building?
A.) 15 psi
B.) 20 psi
C.) 10 psi
D.) 5 psi
Which is a more common position used to operate a hoseline?
Where should the smaller sized solid nozzle tips be kept to facilitate firefighting operation?
A.) Apparatus equipment bay
B.) Firefighter's pocket
C.) Inside the fire station
D.) Over the larger tips
What pattern is NOT used when applying water during a combination attack?
What is the constant in the formula to calculate nozzle reaction of the smooth bore nozzle?
Which type of fog nozzle shutoff is the most common?
B.) Rotating valve
C.) Ball valve
What is the leading cause of poor fire streams?
A.) Improper attack method calculation
B.) Improper hydraulic calculation
C.) Improper hose diameter selection
D.) Improper nozzle tip selection
Improper hydraulic calculation
How many typical rooms of fire can the small-diameter handline extinguish?
A.) 4 to 6
B.) 2 to 4
C.) 3 to 5
D.) 1 to 3
1 to 3
What should the water curtain nozzle be directed onto?
A.) The fire itself
B.) Outside window
C.) Object being protected
D.) Ceiling above the fire
Object being protected
Who adjusts the flow of the automatic or constant pressure nozzle?
A.) Engine driver
C.) Hose layer
D.) Pump operator
Which class foam is being used to protect homes in urban interface areas during wildfires?