Advanced Firefighter Technician Exams Questions and Answers
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Course
Advanced Firefighter Technician
Institution
Advanced Firefighter Technician
Advanced Firefighter Technician
How is foam used as a suppression agent? - Answer- Removes oxygen
Foam % - Answer- Class A materials 0.1 to 1%
Class B materials 3-6%
Foam Application - Answer- -Roll-on is used for a burning liquid spill
-Bank-Down is used when an elevated object is nea...
Advanced Firefighter Technician
How is foam used as a suppression agent? - Answer- Removes oxygen
Foam % - Answer- Class A materials 0.1 to 1%
Class B materials 3-6%
Foam Application - Answer- -Roll-on is used for a burning liquid spill
-Bank-Down is used when an elevated object is near a burning pool of liquid
-Rain-Down is used when the other two methods are not feasible and on above
ground storage tanks
Class A foam - Answer- Foam specially designed for use on Class A combustibles.
Class A foams, hydrocarbon-based surfactants are essentially wetting agents that
reduce the surface tension of water and allow it to soak into combustible materials
more easily than plain water.
Class B foam - Answer- Foam fire-suppression agent designed for use on unignited
or ignited Class B flammable or combustible liquids.
AFFF (Aqueous Film Forming Foam) - Answer- Used as either 1%, 3%, or 6%
Which foam should be used for polar solvents? - Answer- Alcohol resistive foam
define soluability - Answer- Ability for substance to dissolve in a solvent
What elements are needed to produce firefighting foam? - Answer- Suction, 200psi,
eductor, up to 150' after eductor
Air aspirating foam nozzle - Answer- They can be designed to bring the air into either
the front or the back of the nozzle. Air is drawn into the nozzle through the Venturi
effect. As the foam solution passes through the center of the nozzle, a low level of
pressure is created, which allows the air to enter the nozzle. This process consumes
energy. The more air that's drawn in, the more energy is consumed. This causes a
reduction in stream reach.
BLEVE stands for - Answer- Boiling Liquid Expanding Vapor Explosion
Combination Attack - Answer- Extinguishing a fire by using both a direct and an
indirect attack. This method combines the steam-generating technique of a ceiling
level attack with an attack on the burning materials near floor level.
Direct Attack - Answer- In structural fire fighting, an attack method that involves the
discharge of water or a foam stream directly onto the burning fuel.
, Indirect attack - Answer- A method of fire suppression where suppression activity
takes place some distance from the fire perimeter, often taking advantage of fire
barriers
A cylinder fire that is burning from the relief valve should be extinguished - Answer-
True
Streams on a cylinder should be directed where? - Answer- Directly onto fire
Fire Sprinkler System - Answer- An active fire protection measure, consisting of a
water supply system, providing adequate pressure and flow of water through a
distribution piping system, onto which fire sprinklers are connected.
Dry pipe system - Answer- A fire suppression sprinkler system that has pressurized
air in all pipes. The air is released in the event of a fire, allowing water to flow from a
central area.
Wet Pipe Sprinkler System - Answer- Consists of a pressurized water supply system
that can deliver a high quantity of water to an entire building via a piping distribution
system.
Clapper valve - Answer- Hinged valve that permits the flow of water in one direction
only.
Backflow Preventer - Answer- A check valve that prevents water from flowing back
into a system and contaminating it.
OS&Y Valve - Answer- Outside stem and yoke valve; a type of control valve for a
sprinkler system in which the position of the center screw indicates whether the valve
is open or closed.
Butterfly Valve - Answer- Control valve that uses a flat circular plate in a pipe that
rotates 90 degrees across the cross section of the pipe to control the flow of water.
Deluge System - Answer- A fire suppression sprinkler system that keeps all
individual sprinkler heads open and applies water to all areas when activated.
NFPA Hydrant Colors - Answer- Red 0-500GPM
Orange 500-1000GPM
Green 1000-1500GPM
Blue 1500+GPM
water distribution system - Answer- Grid, Ring, Radial, Dead-end
Dead-end water mains - Answer- Dead- end mains, typically in cul-de-sacs, at the
end of rural streets, or even in a looped line, are known problem areas for water
stagnation. Residential neighborhoods under construction and large underpopulated
developments often have slow-moving or stagnant drinking water.
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