FF1 CHAPTER 7 PRACTICE QUESTIONS WITH
DETAILED EXPLANATIONS 2026
◉ What's the difference between the fire triangle and the fire
tetrahedron?
Answer: The inclusion of chemical reaction
◉ what's the difference between piloted ignition and autoignition?
Answer: Piloted ignition: occurs when a mixture of fuel and oxygen
encounter an external heat source with sufficient heat or thermal
energy to start the combustion reaction.
Autoignition: occurs without any external flame or spark to ignite
the fuel gases or vapors.
◉ List the various products of combustion that may be found in fire.
Answer: Carbon monoxide,
Formaldehyde,
Hydrogen Cyanide,
Nitrogen Dioxide,
Particulates,
Sulfur Dioxide.
,◉ How does fire influence the pressure of the surrounding gases?
Answer: Heat from a fire increase the pressure of the surrounding
gases.
◉ Whats the difference between heat and temperature?
Answer: Heat is the thermal kinetic energy needed to release the
potential chemical energy in a fuel.
temperature: is the measurement of the heat.
◉ Contrast the three methods of heat transfer?
Answer: Conduction: is the transfer of heat through and between
solids.
Convection: is the transfer of thermal energy by circulation or
movement of a fluid (liquid or gas)
Radiation: is the transmission of energy as electromagnetic waves,
such as light waves, radio waves, or X-rays, without an intervening
medium.
◉ How are gaseous, liquid, and solid fuel different?
, Answer: Fuel: is the oxidized or burned material or substance in the
combustion process.
Gases: for flaming combustion to occur, fuels must be in the gaseous
state.
Liquids: have a mass and volume but no definite shape except for a
flat surface or the shape of their container. To burn liquids must
vaporize.
Solids: have definite size and shape. When solid fuels are heated,
they begin to pyrolize.
◉ How does oxygen concentration relate to flammability?
Answer: The more oxygen available, the more energy you get from
burning fuel
◉ How are free radicals produced in the chemical reaction that takes
place during flaming combustion?
Answer: Sufficient heat during the flaming combustion causes fuel
and oxygen to form.
◉ How do the four stages of fire development differ?
Answer: Incipient Stage: starts with ignition when the three
elements of the fire triangle come together and the combustion
process begin.
DETAILED EXPLANATIONS 2026
◉ What's the difference between the fire triangle and the fire
tetrahedron?
Answer: The inclusion of chemical reaction
◉ what's the difference between piloted ignition and autoignition?
Answer: Piloted ignition: occurs when a mixture of fuel and oxygen
encounter an external heat source with sufficient heat or thermal
energy to start the combustion reaction.
Autoignition: occurs without any external flame or spark to ignite
the fuel gases or vapors.
◉ List the various products of combustion that may be found in fire.
Answer: Carbon monoxide,
Formaldehyde,
Hydrogen Cyanide,
Nitrogen Dioxide,
Particulates,
Sulfur Dioxide.
,◉ How does fire influence the pressure of the surrounding gases?
Answer: Heat from a fire increase the pressure of the surrounding
gases.
◉ Whats the difference between heat and temperature?
Answer: Heat is the thermal kinetic energy needed to release the
potential chemical energy in a fuel.
temperature: is the measurement of the heat.
◉ Contrast the three methods of heat transfer?
Answer: Conduction: is the transfer of heat through and between
solids.
Convection: is the transfer of thermal energy by circulation or
movement of a fluid (liquid or gas)
Radiation: is the transmission of energy as electromagnetic waves,
such as light waves, radio waves, or X-rays, without an intervening
medium.
◉ How are gaseous, liquid, and solid fuel different?
, Answer: Fuel: is the oxidized or burned material or substance in the
combustion process.
Gases: for flaming combustion to occur, fuels must be in the gaseous
state.
Liquids: have a mass and volume but no definite shape except for a
flat surface or the shape of their container. To burn liquids must
vaporize.
Solids: have definite size and shape. When solid fuels are heated,
they begin to pyrolize.
◉ How does oxygen concentration relate to flammability?
Answer: The more oxygen available, the more energy you get from
burning fuel
◉ How are free radicals produced in the chemical reaction that takes
place during flaming combustion?
Answer: Sufficient heat during the flaming combustion causes fuel
and oxygen to form.
◉ How do the four stages of fire development differ?
Answer: Incipient Stage: starts with ignition when the three
elements of the fire triangle come together and the combustion
process begin.
