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Illinois BOF MOD A Exam & Practice Exam
Questions and Answers Practice Questions with
Solutions Newest 2026-2027 | Already Graded A+
A fire that involves wood, paper, and clothes is in which
category?
Class 1
Type 1
Class A
Type A - ANSWER-Class A
Volume, velocity, density, and which other attribute contribute to
the art of reading smoke?
Color
Clarity
Conduct
Thickness - ANSWER-Color
A fire occurs in a modern residential structure with an open floor
plan. The fire is likely to get larger more quickly due to the
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availability of air and how it can move versus in an older or
compartmentalized home. What allows this rapid growth?
Thermal radiation
Thermal column
Ceiling jet
Flow path - ANSWER-Flow Path
Which of these is in the fire tetrahedron but is not in the fire
triangle?
Heat
Chemical reaction
Oxygen
Fuel - ANSWER-Chemical Reaction
Which fire class responds violently when water is applied?
A
B
C
D - ANSWER-D
How many classes of fire are there?
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3
5
7
9 - ANSWER-5
What is the best way to extinguish a Class C fire?
Use a fire extinguisher.
Cut the power.
Use copious amounts of water.
Call the utility company. - ANSWER-Cut the power
Between the growth and fully developed stages temperature
increases rapidly, this causes the off-gassing of most materials
resulting in what?
Backdraft
Stratification
Thermal runaway
Flashover - ANSWER-Flashover
What is the difference between backdraft and flashover?
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Flashover is ventilation-limited, whereas backdraft is fuel-
limited.
Flashover occurs at a higher temperature than backdraft.
Flashover occurs in the decay stage only; backdraft can occur in
any stage.
Backdraft is a more violent introduction of oxygen than
flashover. - ANSWER-Backdraft is a more violent introduction
of oxygen than flashover.
When considering fire behavior in modern structures, what is a
substantial difference in their building construction versus
legacy structures?
Cost
Energy efficiency
Modern are built larger
Legacy structures will burn quicker - ANSWER-Energy
Efficiency
Which is the most common method to extinguish a fire?
Cool the burning materials.
Exclude oxygen.
Remove the fuel.
Illinois BOF MOD A Exam & Practice Exam
Questions and Answers Practice Questions with
Solutions Newest 2026-2027 | Already Graded A+
A fire that involves wood, paper, and clothes is in which
category?
Class 1
Type 1
Class A
Type A - ANSWER-Class A
Volume, velocity, density, and which other attribute contribute to
the art of reading smoke?
Color
Clarity
Conduct
Thickness - ANSWER-Color
A fire occurs in a modern residential structure with an open floor
plan. The fire is likely to get larger more quickly due to the
,2|Page
availability of air and how it can move versus in an older or
compartmentalized home. What allows this rapid growth?
Thermal radiation
Thermal column
Ceiling jet
Flow path - ANSWER-Flow Path
Which of these is in the fire tetrahedron but is not in the fire
triangle?
Heat
Chemical reaction
Oxygen
Fuel - ANSWER-Chemical Reaction
Which fire class responds violently when water is applied?
A
B
C
D - ANSWER-D
How many classes of fire are there?
,3|Page
3
5
7
9 - ANSWER-5
What is the best way to extinguish a Class C fire?
Use a fire extinguisher.
Cut the power.
Use copious amounts of water.
Call the utility company. - ANSWER-Cut the power
Between the growth and fully developed stages temperature
increases rapidly, this causes the off-gassing of most materials
resulting in what?
Backdraft
Stratification
Thermal runaway
Flashover - ANSWER-Flashover
What is the difference between backdraft and flashover?
, 4|Page
Flashover is ventilation-limited, whereas backdraft is fuel-
limited.
Flashover occurs at a higher temperature than backdraft.
Flashover occurs in the decay stage only; backdraft can occur in
any stage.
Backdraft is a more violent introduction of oxygen than
flashover. - ANSWER-Backdraft is a more violent introduction
of oxygen than flashover.
When considering fire behavior in modern structures, what is a
substantial difference in their building construction versus
legacy structures?
Cost
Energy efficiency
Modern are built larger
Legacy structures will burn quicker - ANSWER-Energy
Efficiency
Which is the most common method to extinguish a fire?
Cool the burning materials.
Exclude oxygen.
Remove the fuel.
