IFSTA 7th Edition CHAPTER 4 | 75 COMPLETE QUESTIONS WITH 100%
RATED CORRECT ANSWERS | 2025 LATEST UPDATED | GET A+
Terms in this set (75)
Fires involve a heat-producing B. an oxidizer
chemical reaction between fuel and:
(117) [4.3.11]
A. a catalyst.
B. an oxidizer.
C. free radicals.
D. a reducing agent.
When a substance changes from C. chemical reaction
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.
Which statement about C. A fuel's potential energy releases during combustion and
energy and combustion is converts to kinetic energy.
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.
,Which element of the fire D. Chemical chain reaction
tetrahedron is included to
explain flaming (gas-phase)
combustion? (120) [4.3.11]
A. Fuel
B. Heat
C. Oxygen
D. Chemical chain reaction
What occurs when a mixture of B. Piloted ignition
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
The minimum temperature at A. autoignition temperature (AIT).
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).
What causes flaming combustion to C. A gaseous fuel mixes with an adequate amount of oxygen and
occur? heats to ignition temperature.
(123) [4.3.11]
A. A solid fuel encounters an
open flame and entrain
enough air to ignite.
B. A gaseous fuel encounters an
external heat source and
experience 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
to sustain an open burning
flame.
What is the cause of most fire B. Exposure to toxic gases found in smoke and/or lack of oxygen
deaths? (124) [4.3.10, 4.3.11]
A. Injuries caused by falling
materials or structural
collapse
B. Exposure to toxic gases found
in smoke and/or lack of
oxygen
C. Exposure to extreme
heat and/or contact with
flames and hot surfaces
D. Accidental injuries
sustained during escape
and/or evacuation procedures
RATED CORRECT ANSWERS | 2025 LATEST UPDATED | GET A+
Terms in this set (75)
Fires involve a heat-producing B. an oxidizer
chemical reaction between fuel and:
(117) [4.3.11]
A. a catalyst.
B. an oxidizer.
C. free radicals.
D. a reducing agent.
When a substance changes from C. chemical reaction
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.
Which statement about C. A fuel's potential energy releases during combustion and
energy and combustion is converts to kinetic energy.
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.
,Which element of the fire D. Chemical chain reaction
tetrahedron is included to
explain flaming (gas-phase)
combustion? (120) [4.3.11]
A. Fuel
B. Heat
C. Oxygen
D. Chemical chain reaction
What occurs when a mixture of B. Piloted ignition
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
The minimum temperature at A. autoignition temperature (AIT).
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).
What causes flaming combustion to C. A gaseous fuel mixes with an adequate amount of oxygen and
occur? heats to ignition temperature.
(123) [4.3.11]
A. A solid fuel encounters an
open flame and entrain
enough air to ignite.
B. A gaseous fuel encounters an
external heat source and
experience 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
to sustain an open burning
flame.
What is the cause of most fire B. Exposure to toxic gases found in smoke and/or lack of oxygen
deaths? (124) [4.3.10, 4.3.11]
A. Injuries caused by falling
materials or structural
collapse
B. Exposure to toxic gases found
in smoke and/or lack of
oxygen
C. Exposure to extreme
heat and/or contact with
flames and hot surfaces
D. Accidental injuries
sustained during escape
and/or evacuation procedures
