ESSENTIALS OF FIREFIGHTING 7TH EDITION
(CHAPTER 6) 2026/2027 ACTUAL QUESTIONS
WITH VERIFIED ANSWERS.
Water type extinguishers must be protected against
freezing if
Temperature is lower than 40° F (4° C)
Manual pump
The operator physically applies pressure to a pump that
increases pressure within the container, forcing the agent out a
nozzle at the end of a hose.
Stored pressure
Compressed air or inert gas within the container forces the
agent out a nozzle at the end of a hose when the operator
presses the handle.
Pressure Cartridge
A separate cartridge on the side of the container contains inert
gas. When the operator punctures the cartridge seal, the
expellant enters the container and forces the agent out a nozzle
on the end of a hose.
Water Mist Extinguisher
used deionized water and produces a fine spray, also safe to
use on energized electrical equipment
Aqueous Film Forming Foam (AFFF)
intended for class B fires. Useful in combating fire in or
suppressing vapors from small liquid fuel spills
, CO2 gas
displaces oxygen and smothers the fire
Halogenated Extinguishing Agents
effective for extinguishing fires in places that contain materials
that could be damaged by water or dry agents
Dry chemical agents are for use on
Class A-B-C fires and/or Class B-C fires
Dry powder agents are only for
Class D fires
After selecting yhe appropriate size and type of
extinguisher for the situation
make a quick visual inspection
Approach the fire from
upwind
PASS
Pull
Aim
Squeeze
Sweep
Using a fire extinguisher close to the fire can
scatter lightweight solid fuels or penetrate the surface of liquid
fuels
If extinguishment is not achieved after an entire
extinguisher has been discharged onto the fire,
withdraw and reassess the situation
(CHAPTER 6) 2026/2027 ACTUAL QUESTIONS
WITH VERIFIED ANSWERS.
Water type extinguishers must be protected against
freezing if
Temperature is lower than 40° F (4° C)
Manual pump
The operator physically applies pressure to a pump that
increases pressure within the container, forcing the agent out a
nozzle at the end of a hose.
Stored pressure
Compressed air or inert gas within the container forces the
agent out a nozzle at the end of a hose when the operator
presses the handle.
Pressure Cartridge
A separate cartridge on the side of the container contains inert
gas. When the operator punctures the cartridge seal, the
expellant enters the container and forces the agent out a nozzle
on the end of a hose.
Water Mist Extinguisher
used deionized water and produces a fine spray, also safe to
use on energized electrical equipment
Aqueous Film Forming Foam (AFFF)
intended for class B fires. Useful in combating fire in or
suppressing vapors from small liquid fuel spills
, CO2 gas
displaces oxygen and smothers the fire
Halogenated Extinguishing Agents
effective for extinguishing fires in places that contain materials
that could be damaged by water or dry agents
Dry chemical agents are for use on
Class A-B-C fires and/or Class B-C fires
Dry powder agents are only for
Class D fires
After selecting yhe appropriate size and type of
extinguisher for the situation
make a quick visual inspection
Approach the fire from
upwind
PASS
Pull
Aim
Squeeze
Sweep
Using a fire extinguisher close to the fire can
scatter lightweight solid fuels or penetrate the surface of liquid
fuels
If extinguishment is not achieved after an entire
extinguisher has been discharged onto the fire,
withdraw and reassess the situation
