COMPREHENSIVE FIRE INVESTIGATOR:
PRINCIPLES AND PRACTICE TO NFPA
921 AND 1033, FOURTH EDITION.GUIDE
WITH VERIFIED ANSWERS. LATEST
UPDATED 2026/2027.
Question 1
Any fuel or oxidizer, often an ignitable liquid, used to initiate a
fire or increase the rate of growth or speed the spread of fire is
called what?
Correct Answer: Accelerant
Rationale: An accelerant is a fuel or oxidizing substance
introduced to a fire to promote ignition, increase fire growth, or
accelerate fire spread. Ignitable liquids are common examples.
Question 2
,Fires for which the proven cause does not involve an
intentional human act to ignite or spread fire into an area where
the fire should not be are called what?
Correct Answer: Accidental fires
Rationale: An accidental fire results from an unintentional act,
equipment failure, or other unintended circumstance rather than
deliberate ignition.
Question 3
A system that uses moving mechanical or electrical parts to
achieve a fire protection goal is called what?
Correct Answer: Active fire protection system
Rationale: Active fire protection systems require some type of
action or activation, often involving mechanical or electrical
components. Examples include fire alarms, automatic
sprinklers, and smoke-control systems.
,Question 4
Fire alarm and detection systems in which devices and system
components are assigned a data address, are capable of two-
way communication, and can perform certain activities based
on signal input are called what?
Correct Answer: Addressable technology
Rationale: Addressable systems identify individual devices by
specific addresses. This allows the fire alarm control panel to
determine which device has activated or developed a problem.
Question 5
Adolescent firesetters are generally children from what age
range?
Correct Answer: 14 to 16 years
Rationale: Adolescent firesetters are typically identified as
youths approximately 14–16 years old. Their fire-setting
behavior may occur in locations outside the home.
, Question 6
What term describes a vessel that is loose and not on moorings
or a towline?
Correct Answer: Adrift
Rationale: A vessel is described as adrift when it is floating
without being secured by a mooring, anchor, towline, or other
means of control.
Question 7
What term describes all green or dead materials located in the
forest canopy?
Correct Answer: Aerial fuels
Rationale: Aerial fuels are combustible vegetation located
above the surface, particularly within the forest canopy. They
can contribute significantly to vertical fire spread.
PRINCIPLES AND PRACTICE TO NFPA
921 AND 1033, FOURTH EDITION.GUIDE
WITH VERIFIED ANSWERS. LATEST
UPDATED 2026/2027.
Question 1
Any fuel or oxidizer, often an ignitable liquid, used to initiate a
fire or increase the rate of growth or speed the spread of fire is
called what?
Correct Answer: Accelerant
Rationale: An accelerant is a fuel or oxidizing substance
introduced to a fire to promote ignition, increase fire growth, or
accelerate fire spread. Ignitable liquids are common examples.
Question 2
,Fires for which the proven cause does not involve an
intentional human act to ignite or spread fire into an area where
the fire should not be are called what?
Correct Answer: Accidental fires
Rationale: An accidental fire results from an unintentional act,
equipment failure, or other unintended circumstance rather than
deliberate ignition.
Question 3
A system that uses moving mechanical or electrical parts to
achieve a fire protection goal is called what?
Correct Answer: Active fire protection system
Rationale: Active fire protection systems require some type of
action or activation, often involving mechanical or electrical
components. Examples include fire alarms, automatic
sprinklers, and smoke-control systems.
,Question 4
Fire alarm and detection systems in which devices and system
components are assigned a data address, are capable of two-
way communication, and can perform certain activities based
on signal input are called what?
Correct Answer: Addressable technology
Rationale: Addressable systems identify individual devices by
specific addresses. This allows the fire alarm control panel to
determine which device has activated or developed a problem.
Question 5
Adolescent firesetters are generally children from what age
range?
Correct Answer: 14 to 16 years
Rationale: Adolescent firesetters are typically identified as
youths approximately 14–16 years old. Their fire-setting
behavior may occur in locations outside the home.
, Question 6
What term describes a vessel that is loose and not on moorings
or a towline?
Correct Answer: Adrift
Rationale: A vessel is described as adrift when it is floating
without being secured by a mooring, anchor, towline, or other
means of control.
Question 7
What term describes all green or dead materials located in the
forest canopy?
Correct Answer: Aerial fuels
Rationale: Aerial fuels are combustible vegetation located
above the surface, particularly within the forest canopy. They
can contribute significantly to vertical fire spread.
