ARFF DRIVER-OPERATOR CDC QUESTIONS CORRECTLY ANSWERED!!
British Thermal Units: -Answer- One BTU is the amount of heat required to raise one pound of water one Fahrenheit.
Hydrogen's BTU Value: -Answer- 2.41 BTU's
Carbon Dioxide's BTU Value: -Answer- 0.19 BTU's
Law of Specific Heat Applic...
ARFF DRIVER-OPERATOR
CDC QUESTIONS
CORRECTLY ANSWERED!!
British Thermal Units: -Answer- One BTU is the amount of heat required to raise one
pound of water one Fahrenheit.
Hydrogen's BTU Value: -Answer- 2.41 BTU's
Carbon Dioxide's BTU Value: -Answer- 0.19 BTU's
Law of Specific Heat Application: -Answer- Fire streams discharged from ARFF
apparatus that provide the greatest surface area are called fog or dispersed streams.
Law of Latent Heat of Vaporization: -Answer- The amount of heat that is required to turn
a liquid into a vapor.
How much does water expand when is is being heated and converts to steam? -
Answer- 1,700 times it's original volume.
Three types of Aircraft Fuels: -Answer- Aviation Gasoline, Blends of Gasoline and
Kerosene, and Kerosene.
Aircraft spills should be blanketed with foam to prevent the release of the flammable
vapors if they are: -Answer- More than 10ft in any direction, 50sqft. in area, or
Continuous.
Factors that may increase the probability of aircraft fuel ignited: -Answer- Sparks from
friction, Electrical sources, and Hot engine components.
Foam Concentrate: -Answer- Raw liquid.
Foam Proportioner: -Answer- A device that introduces the foam concentrate into water.
Foam Solution: -Answer- A mixture of foam concentrate and water.
Foam: -Answer- Product that results after air is introduced to the foam solution.
Two classes of foam concentrate: -Answer- Class A and B
, Fluoroprotein (FPF): -Answer- Most commonly used for protecting fuel tanks and other
storage areas because of it's long lasting heat resistance.
High Expansion Foam: -Answer- Used on Class A fires and are used in fixed
extinguishing systems that may be installed in airport hangars.
Regular Protein Foam: -Answer- Not commonly used.
Aqueous Film Forming Foam: -Answer- Most common. Foam blanket that suppresses
and reseals.
3%: -Answer- Mix 3 gallons of foam concentrate with 97 gallons of water.
6%: -Answer- Mix 6 gallons of foam concentrate with 94 gallons of water.
Low Expansion Foam: -Answer- Are used to extinguish aircraft fuel fires and to
suppress vapors from spills that have not ignited and are typically the ones that drivers
use.
High and Medium Expansion Foam: -Answer- Are used in hard to reach areas because
of their capacity to fill space. These foams aren't normally used on aircraft fuel spills and
fires.
How much dry chemical is on the Striker 3000? -Answer- 500 pounds.
Advantages of Halogenated Agents: -Answer- Compatible with AFFF and Dry Chemical.
Disadvantage of Halogenated Agents: -Answer- Can't prevent flashback, Ineffective for
self-oxidizing fire, and environmental hazards.
Roof Turret Flow Rate: -Answer- 500-1,500 GPM
Bumper Turret Flow Rate: -Answer- 250 GPM
Handline Flow Rate: -Answer- 100 GPM
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