APCO FIRE SERVICE
COMMUNICATIONS FINAL TEST 2026
QUESTIONS WITH CORRECT
ANSWERS GRADED A+
◍ What does "of the essence" refer to for fire service communications?.
Answer: TIME
◍ Structure fires accounted for the bulk of fire-related deaths, injuries, and
property loss. T or F.
Answer: True
◍ Fire triangle - 3 elements needed to support a fire.
Answer: oxygen, fuel, heat
◍ In nature, lighting may be a source of heat. T or F.
Answer: True
◍ What happens when a fire has no heat and what is heat most commonly
removed with?.
Answer: A fire cannot begin or continue without heat and it is most
commonly removed with water.
◍ What happens to a fire without fuel and what materials are considered
fuels?.
Answer: A fire will stop. Materials considered fuels: solids, liquids, and
gases. Gasoline, chemicals, or methane gas.
◍ Fuel also consists of what kind of materials?.
Answer: Solids, liquids, gases, gasoline, chemicals, & methane
gas.Combustible materials include: structures, underbrush, or vehicles
,◍ What is one tactic firefighter use to fight a wildfire?.
Answer: Conducting controlled burns. (uncontrolled burn reaches the
already blackened and burned controlled burn. it takes away the fuel)
◍ Which division in a Fire Service Organizational Structure requires
specialized training for ICS.
Answer: Communications
◍ If a fire starts inside a home and uses all of the oxygen, what is a possible
outcome?.
Answer: The fire could burn itself out because without oxygen, a fire cannot
begin or continue.
◍ Fire Tetrahedron.
Answer: Heat, Fuel, Oxygen, Chemical Chain ReactionAn addition to the
fire triangle , adds the requirement for the presence of a chemical reaction to
support combustion.
◍ The class of Fire that involves combustible cooking fluids.
Answer: Class K
◍ Class A fire.
Answer: Involves ordinary combustibles such as wood, paper, or cloth,
rubber, and many plastics. Primary form of fire suppression is water (- heat)
◍ Fire fighters typically refer to fighting fires in one of two modes.
Answer: Offensively and Defensive
◍ Class B fire.
Answer: Involves combustible and flammable gases and liquids such as
gasoline, oil, kerosene, and propane. Class B fires require the firefighter to
either smother the fire (remove the oxygen) or add a chemical that will not
burn
◍ Responsible for training new fire fighters and for the ongoing training for
department personnel..
Answer: Training and Safety Division
, ◍ Class C fire.
Answer: Involve energized electrical equipment including appliances,
wiring, circuit breakers, and fuse boxes.Methods that can be used to
extinguish: water, water-based agents, oxygen removal, dry chemical
additions
◍ The most visible in the fire service. It contains the frontline firefighters and
commanding officers that respond to an incident. The personnel in this
division are the ones that come to mind when someone thinks of the fire
department.
Answer: Operational Division
◍ Class D fire.
Answer: Involve metals that contain their own oxygen (e.g. magnesium,
sodium, lithium, hafnium, powdered aluminum, etc.) These fires burn at
extremely high temperatures and create their own oxygen. Chemicals must
be introduced to render the fuel noncombustible. Water will NOT work to
extinguish. (magnesium wheel rims on vehicles)
◍ Class K fire.
Answer: Involve combustible cooking fuels such as high-temperature
vegetable or animal oils and fats. Typically extinguished in the same way as
Class B (smother or add chemicals that will not burn)
◍ Defensive Mode.
Answer: Chosen when the fire conditions prevent an interior fire attack (too
unsafe to enter the structure and the fire is beyond what can be controlled by
a handheld hose line)
◍ Offensive Mode.
Answer: Refers to making a direct attack on the fire by entering the structure
and extinguishing the fire from inside.In offensive mode, firefighters will
enter a structure, get behind the fire and fight "from the unburned to the
burned"
◍ Ventilation.
COMMUNICATIONS FINAL TEST 2026
QUESTIONS WITH CORRECT
ANSWERS GRADED A+
◍ What does "of the essence" refer to for fire service communications?.
Answer: TIME
◍ Structure fires accounted for the bulk of fire-related deaths, injuries, and
property loss. T or F.
Answer: True
◍ Fire triangle - 3 elements needed to support a fire.
Answer: oxygen, fuel, heat
◍ In nature, lighting may be a source of heat. T or F.
Answer: True
◍ What happens when a fire has no heat and what is heat most commonly
removed with?.
Answer: A fire cannot begin or continue without heat and it is most
commonly removed with water.
◍ What happens to a fire without fuel and what materials are considered
fuels?.
Answer: A fire will stop. Materials considered fuels: solids, liquids, and
gases. Gasoline, chemicals, or methane gas.
◍ Fuel also consists of what kind of materials?.
Answer: Solids, liquids, gases, gasoline, chemicals, & methane
gas.Combustible materials include: structures, underbrush, or vehicles
,◍ What is one tactic firefighter use to fight a wildfire?.
Answer: Conducting controlled burns. (uncontrolled burn reaches the
already blackened and burned controlled burn. it takes away the fuel)
◍ Which division in a Fire Service Organizational Structure requires
specialized training for ICS.
Answer: Communications
◍ If a fire starts inside a home and uses all of the oxygen, what is a possible
outcome?.
Answer: The fire could burn itself out because without oxygen, a fire cannot
begin or continue.
◍ Fire Tetrahedron.
Answer: Heat, Fuel, Oxygen, Chemical Chain ReactionAn addition to the
fire triangle , adds the requirement for the presence of a chemical reaction to
support combustion.
◍ The class of Fire that involves combustible cooking fluids.
Answer: Class K
◍ Class A fire.
Answer: Involves ordinary combustibles such as wood, paper, or cloth,
rubber, and many plastics. Primary form of fire suppression is water (- heat)
◍ Fire fighters typically refer to fighting fires in one of two modes.
Answer: Offensively and Defensive
◍ Class B fire.
Answer: Involves combustible and flammable gases and liquids such as
gasoline, oil, kerosene, and propane. Class B fires require the firefighter to
either smother the fire (remove the oxygen) or add a chemical that will not
burn
◍ Responsible for training new fire fighters and for the ongoing training for
department personnel..
Answer: Training and Safety Division
, ◍ Class C fire.
Answer: Involve energized electrical equipment including appliances,
wiring, circuit breakers, and fuse boxes.Methods that can be used to
extinguish: water, water-based agents, oxygen removal, dry chemical
additions
◍ The most visible in the fire service. It contains the frontline firefighters and
commanding officers that respond to an incident. The personnel in this
division are the ones that come to mind when someone thinks of the fire
department.
Answer: Operational Division
◍ Class D fire.
Answer: Involve metals that contain their own oxygen (e.g. magnesium,
sodium, lithium, hafnium, powdered aluminum, etc.) These fires burn at
extremely high temperatures and create their own oxygen. Chemicals must
be introduced to render the fuel noncombustible. Water will NOT work to
extinguish. (magnesium wheel rims on vehicles)
◍ Class K fire.
Answer: Involve combustible cooking fuels such as high-temperature
vegetable or animal oils and fats. Typically extinguished in the same way as
Class B (smother or add chemicals that will not burn)
◍ Defensive Mode.
Answer: Chosen when the fire conditions prevent an interior fire attack (too
unsafe to enter the structure and the fire is beyond what can be controlled by
a handheld hose line)
◍ Offensive Mode.
Answer: Refers to making a direct attack on the fire by entering the structure
and extinguishing the fire from inside.In offensive mode, firefighters will
enter a structure, get behind the fire and fight "from the unburned to the
burned"
◍ Ventilation.
