NFPA 1033 LATEST 2026 EXAM QUESTIONS AND
ANSWERS RATED A+
✔✔Deluge Sprinkler System - ✔✔A type of automatic fire sprinkler system equipped
with open fire sprinkler heads that simultaneously discharges water from all sprinkler
heads.
✔✔Demonstrative Evidence - ✔✔Any type of tangible evidence relevant to a case, for
example, diagrams and photographs.
✔✔Demonstrative Evidence - ✔✔Photographs, maps, X-rays, visible tests, and
demonstrations.
✔✔Density/Area Curves - ✔✔Graphs that establish the relationship between the
required amount of water flow from a sprinkler head (density) and the area that must be
covered by the water for different hazard classifications.
✔✔Deposition - ✔✔One type of pre-trial oral testimony made under oath.
✔✔Depth of Calcination Surveys - ✔✔Measurements of the relative depth of calcination
(observable physical changes in gypsum wallboard) plotted on a detailed scene
diagram to determine locations within a structure that were exposed longest to a heat
source.
✔✔Depth of Char Surveys - ✔✔Measurements of the relative depth of char on identical
fuels plotted on a detailed scene diagram to determine locations within a structure that
were exposed longest to a heat source.
✔✔Design Density - ✔✔The minimum predetermined amount of water that must flow
from the fire sprinkler heads in the most hydraulically demanding part of the fire
sprinkler system (remote area) to control or extinguish a fire.
✔✔Detonation - ✔✔A combustion reaction that propagates a supersonic velocities,
greater than 1100 feet (340 m) per second, and cannot be vented because of its speed.
✔✔Diagrams - ✔✔Formal drawings that are completed after the scene investigation is
completed.
✔✔Diffusion Flame - ✔✔A flame in which the fuel and air mix or diffuse together at the
region of combustion.
✔✔Direct Current (DC) - ✔✔The voltage is a steady level that does not vary with time.
The current will also be a steady level if the load is resistive.
,✔✔Direct Evidence - ✔✔Testimony of witnesses who observe acts or detect something
through their five senses and surveillance equipment such as CCTV.
✔✔Documentary Evidence - ✔✔Any type of written record or document that is relevant
to the case.
✔✔Dry Chemical Extinguishing Agents - ✔✔A dry powder suppression agent made
from sodium bicarbonate-based, potassium-based, or ammonium phosphate chemicals
that covers and smothers the burning material.
✔✔Dry Pipe Sprinkler System - ✔✔A type of automatic fire sprinkler system equipped
with automatic sprinkler heads that has pressurized air or nitrogen in the pipes until a
sprinkler head activates to reduce the air or nitrogen pressure, permitting the dry pipe
valve clapper to open, flooding the system piping with water.
✔✔Duct Smoke Detectors - ✔✔Smoke detectors that sample the air moving through the
air distribution system ductwork or plenum; upon detecting smoke, the detector sends a
signal to shut down the air distribution unit, close any associated smoke dampers, or
initiate smoke control system operations.
✔✔Duff - ✔✔The layer of decomposing organic materials lying below the litter layer of
freshly fallen twigs, needles, and leaves and immediately above the mineral soil.
✔✔Electrical Power - ✔✔The rate of doing work (using electrical energy) in an electrical
circuit, such as in a hair dryer, electric motor, or lightbulb.
✔✔Electronic (or engine) Control Module (ECM) - ✔✔An electronic device that controls
engine operation parameters, including fuel delivery, throttle control, and safety systems
operations.
✔✔Electronic Valve Supervisory Device - ✔✔A device or switch that integrates with or
attaches to a water control valve that detects movement or changes in the position of
the valve and then sends a signal that the normal open position has changed.
✔✔Empirical Data - ✔✔Factual data that are based on actual measurements,
observation, or direct sensory experience, rather than on theory.
✔✔Entity In Control - ✔✔The interested party who has or represents ownership of the
scene or is in effective management of the site, scene, or evidence, and is organizing,
directing, or controlling the joint actions of the other interested parties.
✔✔Estimated Time - ✔✔An approximation based on information or calculations that
may or may not be relative to other events or activities.
, ✔✔Eutectic Melting - ✔✔Any combination of metals with melting point lower than that of
any of the individual metals of which it consists.
✔✔Event Data Recorder (EDR) - ✔✔A device to record data before and after a crash
event.
✔✔Evidence Custodian - ✔✔Person who is responsible for managing all aspects of
evidence control.
✔✔Evidence Technicians - ✔✔Individuals who are specially trained to document,
collect, preserve, and transport evidence.
✔✔Exemplar - ✔✔An exact duplicate of an appliance.
✔✔Exothermic Reaction - ✔✔Reaction characterized by or formed with evolution of
heat.
✔✔Expectation Bias - ✔✔Preconceived determination or premature conclusion as to
what the cause of the fire was without having examined or considered all of the relevant
data.
✔✔Expert Witness - ✔✔One who is recognized by a court as qualified by specialized
knowledge, skills, experience, or education on an issue.
✔✔Explosion Dynamics Analysis - ✔✔The process of using force vectors to trace
backward from the least to the most areas of damage following the general path of the
explosion force vectors.
✔✔Explosion - ✔✔The sudden conversion of potential energy (chemical or mechanical)
into kinetic energy with the production and release of gases under pressure. These
high-pressure gases then do mechanical work such as moving, changing, or shattering
nearby materials.
✔✔Explosives - ✔✔Any chemical compounds, mixtures, or devices that function by
explosion.
✔✔Fact Witness - ✔✔One who testifies about facts from their personal knowledge or
experiences; also called a lay witness.
✔✔Failure Analysis - ✔✔A logical, systematic examination of an item, component,
assembly, or structure and its place and function within a system, conducted in order to
identify and analyze the probability, causes, and consequences of potential and real
failures.
ANSWERS RATED A+
✔✔Deluge Sprinkler System - ✔✔A type of automatic fire sprinkler system equipped
with open fire sprinkler heads that simultaneously discharges water from all sprinkler
heads.
✔✔Demonstrative Evidence - ✔✔Any type of tangible evidence relevant to a case, for
example, diagrams and photographs.
✔✔Demonstrative Evidence - ✔✔Photographs, maps, X-rays, visible tests, and
demonstrations.
✔✔Density/Area Curves - ✔✔Graphs that establish the relationship between the
required amount of water flow from a sprinkler head (density) and the area that must be
covered by the water for different hazard classifications.
✔✔Deposition - ✔✔One type of pre-trial oral testimony made under oath.
✔✔Depth of Calcination Surveys - ✔✔Measurements of the relative depth of calcination
(observable physical changes in gypsum wallboard) plotted on a detailed scene
diagram to determine locations within a structure that were exposed longest to a heat
source.
✔✔Depth of Char Surveys - ✔✔Measurements of the relative depth of char on identical
fuels plotted on a detailed scene diagram to determine locations within a structure that
were exposed longest to a heat source.
✔✔Design Density - ✔✔The minimum predetermined amount of water that must flow
from the fire sprinkler heads in the most hydraulically demanding part of the fire
sprinkler system (remote area) to control or extinguish a fire.
✔✔Detonation - ✔✔A combustion reaction that propagates a supersonic velocities,
greater than 1100 feet (340 m) per second, and cannot be vented because of its speed.
✔✔Diagrams - ✔✔Formal drawings that are completed after the scene investigation is
completed.
✔✔Diffusion Flame - ✔✔A flame in which the fuel and air mix or diffuse together at the
region of combustion.
✔✔Direct Current (DC) - ✔✔The voltage is a steady level that does not vary with time.
The current will also be a steady level if the load is resistive.
,✔✔Direct Evidence - ✔✔Testimony of witnesses who observe acts or detect something
through their five senses and surveillance equipment such as CCTV.
✔✔Documentary Evidence - ✔✔Any type of written record or document that is relevant
to the case.
✔✔Dry Chemical Extinguishing Agents - ✔✔A dry powder suppression agent made
from sodium bicarbonate-based, potassium-based, or ammonium phosphate chemicals
that covers and smothers the burning material.
✔✔Dry Pipe Sprinkler System - ✔✔A type of automatic fire sprinkler system equipped
with automatic sprinkler heads that has pressurized air or nitrogen in the pipes until a
sprinkler head activates to reduce the air or nitrogen pressure, permitting the dry pipe
valve clapper to open, flooding the system piping with water.
✔✔Duct Smoke Detectors - ✔✔Smoke detectors that sample the air moving through the
air distribution system ductwork or plenum; upon detecting smoke, the detector sends a
signal to shut down the air distribution unit, close any associated smoke dampers, or
initiate smoke control system operations.
✔✔Duff - ✔✔The layer of decomposing organic materials lying below the litter layer of
freshly fallen twigs, needles, and leaves and immediately above the mineral soil.
✔✔Electrical Power - ✔✔The rate of doing work (using electrical energy) in an electrical
circuit, such as in a hair dryer, electric motor, or lightbulb.
✔✔Electronic (or engine) Control Module (ECM) - ✔✔An electronic device that controls
engine operation parameters, including fuel delivery, throttle control, and safety systems
operations.
✔✔Electronic Valve Supervisory Device - ✔✔A device or switch that integrates with or
attaches to a water control valve that detects movement or changes in the position of
the valve and then sends a signal that the normal open position has changed.
✔✔Empirical Data - ✔✔Factual data that are based on actual measurements,
observation, or direct sensory experience, rather than on theory.
✔✔Entity In Control - ✔✔The interested party who has or represents ownership of the
scene or is in effective management of the site, scene, or evidence, and is organizing,
directing, or controlling the joint actions of the other interested parties.
✔✔Estimated Time - ✔✔An approximation based on information or calculations that
may or may not be relative to other events or activities.
, ✔✔Eutectic Melting - ✔✔Any combination of metals with melting point lower than that of
any of the individual metals of which it consists.
✔✔Event Data Recorder (EDR) - ✔✔A device to record data before and after a crash
event.
✔✔Evidence Custodian - ✔✔Person who is responsible for managing all aspects of
evidence control.
✔✔Evidence Technicians - ✔✔Individuals who are specially trained to document,
collect, preserve, and transport evidence.
✔✔Exemplar - ✔✔An exact duplicate of an appliance.
✔✔Exothermic Reaction - ✔✔Reaction characterized by or formed with evolution of
heat.
✔✔Expectation Bias - ✔✔Preconceived determination or premature conclusion as to
what the cause of the fire was without having examined or considered all of the relevant
data.
✔✔Expert Witness - ✔✔One who is recognized by a court as qualified by specialized
knowledge, skills, experience, or education on an issue.
✔✔Explosion Dynamics Analysis - ✔✔The process of using force vectors to trace
backward from the least to the most areas of damage following the general path of the
explosion force vectors.
✔✔Explosion - ✔✔The sudden conversion of potential energy (chemical or mechanical)
into kinetic energy with the production and release of gases under pressure. These
high-pressure gases then do mechanical work such as moving, changing, or shattering
nearby materials.
✔✔Explosives - ✔✔Any chemical compounds, mixtures, or devices that function by
explosion.
✔✔Fact Witness - ✔✔One who testifies about facts from their personal knowledge or
experiences; also called a lay witness.
✔✔Failure Analysis - ✔✔A logical, systematic examination of an item, component,
assembly, or structure and its place and function within a system, conducted in order to
identify and analyze the probability, causes, and consequences of potential and real
failures.
