NFPA 921 EXAM QUESTIONS WITH 100%
VERIFIED ANSWERS | LATEST UPDATED
2026/2027 | GRADED A+ | ASSURED PASS
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Terms in this set (332)
Absolute Temperature A temperature measured in Kelvins (K) or Rankines
(R).
Accelerant A fuel or oxidizer, often an ignitible liquid,
intentionally used to initiate a fire or increase the
rate of growth or spread of fire.
Accident An unplanned event that interrupts an activity and
sometimes causes injury or damage or a chance
occurrence arising from unknown causes; an
unexpected happening due to carelessness,
ignorance, and the like.
Active Fire Protection System A system that uses moving mechanical or electrical
parts to achieve a fire protection goal.
Ambient Someone's or something's surroundings, especially
as they pertain to the local environment; for
example, ambient air and ambient temperature.
, Ampacity The maximum current, in amperes, that a conductor
can carry continuously under the conditions of use
without exceeding its temperature rating.
Ampere The unit of electric current that is equivalent to a
flow of one coulomb per second; one coulomb is
defined as 6.24 × 1018 electrons.
Arc A high-temperature luminous electric discharge
across a gap or through a medium such as charred
insulation.
Arc Mapping The systematic evaluation of the electrical circuit
configuration, spatial relationship of the circuit
components, and identification of electrical arc
sites to assist in the identification of the area of
origin and analysis of the fire's spread.
Arc Site The location on a conductor with localized
damage that resulted from an electrical arc.
Arcing Through Char Arcing associated with a matrix of charred material
(e.g., charred conductor insulation) that acts as a
semiconductive medium.
Area of Origin A structure, part of a structure, or general
geographic location within a fire scene, in which
the "point of origin" of a fire or explosion is
reasonably believed to be located.
Arrow Pattern A fire pattern displayed on the cross- section of a
burned wooden structural member.
VERIFIED ANSWERS | LATEST UPDATED
2026/2027 | GRADED A+ | ASSURED PASS
Save
Terms in this set (332)
Absolute Temperature A temperature measured in Kelvins (K) or Rankines
(R).
Accelerant A fuel or oxidizer, often an ignitible liquid,
intentionally used to initiate a fire or increase the
rate of growth or spread of fire.
Accident An unplanned event that interrupts an activity and
sometimes causes injury or damage or a chance
occurrence arising from unknown causes; an
unexpected happening due to carelessness,
ignorance, and the like.
Active Fire Protection System A system that uses moving mechanical or electrical
parts to achieve a fire protection goal.
Ambient Someone's or something's surroundings, especially
as they pertain to the local environment; for
example, ambient air and ambient temperature.
, Ampacity The maximum current, in amperes, that a conductor
can carry continuously under the conditions of use
without exceeding its temperature rating.
Ampere The unit of electric current that is equivalent to a
flow of one coulomb per second; one coulomb is
defined as 6.24 × 1018 electrons.
Arc A high-temperature luminous electric discharge
across a gap or through a medium such as charred
insulation.
Arc Mapping The systematic evaluation of the electrical circuit
configuration, spatial relationship of the circuit
components, and identification of electrical arc
sites to assist in the identification of the area of
origin and analysis of the fire's spread.
Arc Site The location on a conductor with localized
damage that resulted from an electrical arc.
Arcing Through Char Arcing associated with a matrix of charred material
(e.g., charred conductor insulation) that acts as a
semiconductive medium.
Area of Origin A structure, part of a structure, or general
geographic location within a fire scene, in which
the "point of origin" of a fire or explosion is
reasonably believed to be located.
Arrow Pattern A fire pattern displayed on the cross- section of a
burned wooden structural member.
