Nozzles, Fire Streams and Foam Rapid Fire

What position should the nozzleman hold the nozzle when waiting to move into a burning room?

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?

A.) Indirect
B.) Combination
C.) Direct
D.) Singular

Which special purpose nozzle is designed to spray water to protect against exposure to heat?

A.) Water curtain
B.) Piercing
C.) Cellar
D.) Bresnan distributor

What happens when the gallonage and pattern are adjustedon the fog nozzle that makes the changes detectable in the dark?

A.) Shifts
B.) Clicks
C.) Lights up
D.) Squeaks

Which type of foam application is made from natural protein materials, such as animal blood?

A.) Fluoroprotein film-forming
B.) Fluoroprotein
C.) Protein
D.) Alcohol-resistant

Which type of friction loss occurs when water moves through the valves and turns of the ladder pipe?

A.) Pressure
B.) Nozzle
C.) Elevation
D.) Appliance

Which foam application technique involves the foam striking the ground before the fire and rolling into the fire?

A.) Bounce-off
B.) Bank-back
C.) Snowflake
D.) Bank-in

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

Which is most likely the most commonly used polar solvent?

A.) Ketones
B.) Methyl alcohol
C.) Acetones
D.) Ethyl alcohol

Who adjusts the spray pattern of the fog nozzle?

A.) Nozzleperson
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

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

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

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?

A.) Hose
B.) Water
C.) Pump
D.) Coupling

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

What must the straight stream pass around in the fog nozzle that causes air to be introduced into the stream?

A.) Baffle
B.) Liner
C.) Cartridge
D.) Spring

Which type of eductor is always piped through the venturi?

A.) On-demand
B.) Around-the-pump
C.) Bypass
D.) In-line

What size fog nozzle moves more air than a 24-inch smoke ejector?

A.) 1 1/2-inch
B.) 2-inch
C.) 1-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

At what pressure (psi) have fog nozzles traditionally operated?

A.) 50
B.) 75
C.) 100
D.) 125

What must be added to the foam mixture to complete the process?

A.) Concentrate
B.) Water
C.) Fuel
D.) Air

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

Which measures the pressure at the bottom of a column of water in feet?

A.) Gauge
B.) Vacuum
C.) Head
D.) Velocity

What size fog nozzle moves more air than a 14-inch smoke ejector?

A.) 1/2-inch
B.) Booster line
C.) 1-inch
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?

A.) 15
B.) 17
C.) 13
D.) 11

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

What is the maximum air to solution ratio of low expansion foam?

A.) 200:1
B.) 2,000:1
C.) 20:1
D.) 1,000:1

How many firefighters are required to operate a hose line that is flowing 100 gpm?

A.) 1
B.) 2
C.) 4
D.) 3

Which type of nozzle do many firefighters consider more effective?

A.) Solid tip
B.) Smooth bore
C.) Solid stream
D.) Fog

How many firefighters are needed to operate master streams that can flow over 350 gpm?

A.) 2
B.) 4
C.) 1
D.) 3

What is the major natural factor affecting fire stream?

A.) Wind
B.) Rain
C.) Snow
D.) Gravity

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

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?

A.) 8
B.) 4
C.) 10
D.) 6

What is the upper limit of the air to solution ratio of high expansion foam?

A.) 3,000:1
B.) 2,000:1
C.) 1,000:1
D.) 4,000:1

What is the nozzle pressure (psi) of the fog masterstream?

A.) 50
B.) 75
C.) 100
D.) 80

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?

A.) Sitting
B.) Standing
C.) Lying
D.) Crouching

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?

A.) Circular
B.) Z
C.) Triangular
D.) T

What is the constant in the formula to calculate nozzle reaction of the smooth bore nozzle?

A.) 1.61
B.) 1.63
C.) 1.59
D.) 1.57

Which type of fog nozzle shutoff is the most common?

A.) Pulley-type
B.) Rotating valve
C.) Ball valve
D.) Lever-type

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

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

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

Who adjusts the flow of the automatic or constant pressure nozzle?

A.) Engine driver
B.) Nozzleman
C.) Hose layer
D.) Pump operator

Which class foam is being used to protect homes in urban interface areas during wildfires?

A.) Class A
B.) Class D
C.) Class B
D.) Class C