IFSTA Essentials of Fire Fighting, 7th Edition
Chapter 4: Fire Dynamics - COMPLETE EXAM 2026 latest updated
latest with must know questions
.
1. Fires involve a heat-producing chemical reaction between fuel and:
(117) [4.3.11]
A. a catalyst.
B. an oxidizer.
C. free radicals.
D. a reducing agent.
-Correct Answer-: B. an oxidizer.
2. When a substance changes from one type of matter into another,
such as two or more substances combining to form compounds, the
substance undergoes a: (118) [4.3.11]
A. dissolution.
B. metamorphosis.
,C. chemical reaction.
D. physiological change.
-Correct Answer-: C. chemical reaction.
3. Which statement about energy and combustion is accurate? (120)
[4.3.11]
A. A fuel's chemical energy is the result of rapid vibrations in the
molecules.
B. Chemical and physical changes almost never involve an exchange of
energy.
C. A fuel's potential energy releases during combustion and converts to
kinetic energy.
D. Chemical changes involve an exchange of energy; physical changes
involve no energy exchange.
-Correct Answer-: C. A fuel's potential energy releases during
combustion and converts to kinetic energy.
,4. Which element of the fire tetrahedron is included to explain
flaming (gas-phase) combustion? (120) [4.3.11]
A. Fuel
B. Heat
C. Oxygen
D. Chemical chain reaction
-Correct Answer-: D. Chemical chain reaction.
5. What occurs when a mixture of fuel and oxygen encounter an
external heat source with sufficient heat or thermal energy to start
the combustion reaction? (120) [4.3.11]
A. Autoignition
B. Piloted ignition
C. Kinetic ignition
D. Sustained ignition
-Correct Answer-: B. Piloted ignition.
, 6. The minimum temperature at which a fuel in the air must be
heated in order to start self-sustained combustion is known as the:
(122) [4.3.11]
A. autoignition temperature (AIT).
B. piloted ignition temperature (PIT).
C. lower explosive (flammable) limit (LEL).
D. upper explosive (flammable) limit (UEL).
-Correct Answer-: A. autoignition temperature (AIT).
7. What causes flaming combustion to occur? (123) [4.3.11]
A. A solid fuel encounters an open flame and entrains enough air to
ignite.
B. A gaseous fuel encounters an external heat source and experiences
piloted ignition.
C. A gaseous fuel mixes with an adequate amount of oxygen and heats
to ignition temperature.
D. A solid fuel mixes with an adequate amount of liquid fuel to be able
Chapter 4: Fire Dynamics - COMPLETE EXAM 2026 latest updated
latest with must know questions
.
1. Fires involve a heat-producing chemical reaction between fuel and:
(117) [4.3.11]
A. a catalyst.
B. an oxidizer.
C. free radicals.
D. a reducing agent.
-Correct Answer-: B. an oxidizer.
2. When a substance changes from one type of matter into another,
such as two or more substances combining to form compounds, the
substance undergoes a: (118) [4.3.11]
A. dissolution.
B. metamorphosis.
,C. chemical reaction.
D. physiological change.
-Correct Answer-: C. chemical reaction.
3. Which statement about energy and combustion is accurate? (120)
[4.3.11]
A. A fuel's chemical energy is the result of rapid vibrations in the
molecules.
B. Chemical and physical changes almost never involve an exchange of
energy.
C. A fuel's potential energy releases during combustion and converts to
kinetic energy.
D. Chemical changes involve an exchange of energy; physical changes
involve no energy exchange.
-Correct Answer-: C. A fuel's potential energy releases during
combustion and converts to kinetic energy.
,4. Which element of the fire tetrahedron is included to explain
flaming (gas-phase) combustion? (120) [4.3.11]
A. Fuel
B. Heat
C. Oxygen
D. Chemical chain reaction
-Correct Answer-: D. Chemical chain reaction.
5. What occurs when a mixture of fuel and oxygen encounter an
external heat source with sufficient heat or thermal energy to start
the combustion reaction? (120) [4.3.11]
A. Autoignition
B. Piloted ignition
C. Kinetic ignition
D. Sustained ignition
-Correct Answer-: B. Piloted ignition.
, 6. The minimum temperature at which a fuel in the air must be
heated in order to start self-sustained combustion is known as the:
(122) [4.3.11]
A. autoignition temperature (AIT).
B. piloted ignition temperature (PIT).
C. lower explosive (flammable) limit (LEL).
D. upper explosive (flammable) limit (UEL).
-Correct Answer-: A. autoignition temperature (AIT).
7. What causes flaming combustion to occur? (123) [4.3.11]
A. A solid fuel encounters an open flame and entrains enough air to
ignite.
B. A gaseous fuel encounters an external heat source and experiences
piloted ignition.
C. A gaseous fuel mixes with an adequate amount of oxygen and heats
to ignition temperature.
D. A solid fuel mixes with an adequate amount of liquid fuel to be able
