IICRC Fire & Smoke Restoration Technician Exam Prep – Real Practice
Questions, Answers & Detailed Rationales (Updated 2026) | Fire
Damage Assessment, Smoke & Soot Removal Techniques, Odor Control &
Deodorization, Cleaning Chemicals & Restoration Equipment, Structural
Cleaning Procedures, HVAC Smoke Contamination, Safety Standards,
Restoration Documentation & IICRC Certification Review
Question 1: What are the three essential components required for combustion to
occur, commonly referred to as the fire triangle?
A. Heat, fuel, and nitrogen
B. Heat, fuel, and oxygen
C. Oxygen, carbon dioxide, and heat
D. Fuel, water, and ignition source
CORRECT ANSWER: B. Heat, fuel, and oxygen
Rationale: The fire triangle consists of heat, fuel, and oxygen; all three elements must
be present simultaneously for combustion to occur. Removing any one component will
prevent or extinguish a fire, which is fundamental knowledge for fire restoration
technicians when assessing fire behavior and damage patterns.
Question 2: Which class of fire involves energized electrical equipment and
requires non-conductive extinguishing agents?
A. Class A
B. Class B
C. Class C
D. Class K
CORRECT ANSWER: C. Class C
Rationale: Class C fires involve energized electrical equipment. Non-conductive
extinguishing agents such as carbon dioxide or dry chemical must be used to prevent
electrical shock to the operator. Once the electrical equipment is de-energized, the fire
may be reclassified based on the fuel source.
Question 3: According to ANSI/IICRC S700, what is the primary purpose of
developing a Restoration Work Plan (RWP)?
A. To estimate the total cost of reconstruction
B. To document the scope, methods, and procedures for fire and smoke damage
restoration
C. To assign liability for the fire incident
D. To determine insurance coverage limits
CORRECT ANSWER: B. To document the scope, methods, and procedures for fire
and smoke damage restoration
,Rationale: The ANSI/IICRC S700 Standard requires the development of a Restoration
Work Plan (RWP) to document the assessment findings, restoration objectives, cleaning
methods, deodorization strategies, and verification procedures. This ensures
systematic, consistent, and defensible restoration practices.
Question 4: Which type of smoke residue is typically produced by the slow,
smoldering combustion of natural materials like wood or paper and is
characterized by heavy, black, powdery soot?
A. Wet smoke
B. Dry smoke
C. Protein smoke
D. Fuel oil soot
CORRECT ANSWER: B. Dry smoke
Rationale: Dry smoke results from fast-burning, high-temperature fires involving natural
materials such as wood or paper. It produces fine, powdery, black soot that is relatively
easy to remove with dry cleaning methods. Understanding residue types guides
appropriate cleaning technique selection.
Question 5: What personal protective equipment (PPE) is minimally required when
entering a structure with visible soot contamination and unknown air quality?
A. Safety glasses and gloves only
B. N95 respirator, gloves, and disposable coveralls
C. Full-face respirator with organic vapor cartridges, gloves, coveralls, and eye
protection
D. No PPE required if the structure has been ventilated
CORRECT ANSWER: C. Full-face respirator with organic vapor cartridges, gloves,
coveralls, and eye protection
Rationale: Fire-damaged structures may contain hazardous airborne contaminants
including soot particles, volatile organic compounds (VOCs), and carcinogens.
ANSI/IICRC S700 and OSHA guidelines require appropriate respiratory protection, skin
protection, and eye protection to safeguard technicians during assessment and
restoration activities.
Question 6: Which deodorization method works by chemically altering odor
molecules through oxidation?
A. Adsorption using activated charcoal
B. Thermal fogging
C. Ozone treatment
D. Masking with fragrances
CORRECT ANSWER: C. Ozone treatment
,Rationale: Ozone (O₃) is a powerful oxidizing agent that breaks down odor-causing
molecules by altering their chemical structure. Ozone generators must be used in
unoccupied spaces with proper safety protocols due to respiratory hazards. This
method is effective for penetrating porous materials where odors are trapped.
Question 7: When assessing fire damage, what does the term "soil loading" refer
to?
A. The weight of debris that must be removed from the structure
B. The concentration and distribution of soot and smoke residues on surfaces
C. The amount of water used during fire suppression
D. The structural load capacity after fire exposure
CORRECT ANSWER: B. The concentration and distribution of soot and smoke
residues on surfaces
Rationale: Soil loading describes the density and pattern of smoke and soot deposits
on surfaces. Assessing soil loading helps technicians determine cleaning methods,
estimate labor, and verify cleaning effectiveness. High soil loading may require multiple
cleaning passes or specialized techniques.
Question 8: Which cleaning method is most appropriate for removing dry, powdery
soot from delicate wallpaper without causing damage?
A. Wet cleaning with detergent solution
B. Abrasive scrubbing with steel wool
C. Dry cleaning using a soot sponge or chemical sponge
D. Pressure washing
CORRECT ANSWER: C. Dry cleaning using a soot sponge or chemical sponge
Rationale: Dry cleaning methods such as soot sponges (chemical sponges) are
designed to lift dry, powdery residues without introducing moisture that could damage
sensitive surfaces like wallpaper. Wet methods may cause staining, ink bleeding, or
adhesive failure on delicate materials.
Question 9: What is the primary function of a hydroxyl generator in fire restoration
deodorization?
A. To produce ozone for oxidation of odors
B. To generate hydroxyl radicals that safely oxidize odor molecules in occupied spaces
C. To adsorb odors onto a carbon filter
D. To mask odors with pleasant fragrances
CORRECT ANSWER: B. To generate hydroxyl radicals that safely oxidize odor
molecules in occupied spaces
Rationale: Hydroxyl generators produce hydroxyl radicals (•OH), which are highly
reactive oxidizers that break down odor-causing compounds. Unlike ozone, hydroxyl
, technology can often be used in occupied spaces with proper monitoring, making it
valuable for continuous deodorization during restoration.
Question 10: According to ANSI/IICRC S700, when should test cleaning be
performed during a fire restoration project?
A. Only after all cleaning is complete to verify results
B. Before beginning full-scale cleaning to determine the most effective method for
specific residues and substrates
C. Test cleaning is not required by the standard
D. Only when the client requests it
CORRECT ANSWER: B. Before beginning full-scale cleaning to determine the most
effective method for specific residues and substrates
Rationale: ANSI/IICRC S700 emphasizes test cleaning as a critical step to evaluate
cleaning efficacy, prevent damage, and select appropriate methods for specific residue-
substrate combinations. Results inform the Restoration Work Plan and help avoid costly
rework or substrate damage.
Question 11: Which of the following best describes "protein smoke" residue?
A. Black, powdery soot from burning wood
B. Yellowish-brown, sticky residue with a pungent odor from burning meat or other
proteins
C. Thick, black, oily residue from petroleum-based fuels
D. White, chalky residue from burning plastics
CORRECT ANSWER: B. Yellowish-brown, sticky residue with a pungent odor from
burning meat or other proteins
Rationale: Protein smoke results from the low-temperature, smoldering combustion of
protein-based materials such as meat, fish, or dairy. It produces a tenacious, yellowish-
brown residue with a strong, unpleasant odor that is challenging to remove and often
requires specialized cleaning and deodorization techniques.
Question 12: What is the recommended first step when responding to a fire-
damaged structure?
A. Begin immediate cleaning of visible soot
B. Conduct a thorough safety assessment and hazard identification
C. Remove all contents to an off-site facility
D. Start deodorization with ozone treatment
CORRECT ANSWER: B. Conduct a thorough safety assessment and hazard
identification
Rationale: Safety is paramount in fire restoration. Before any restoration activities
begin, technicians must assess structural integrity, electrical hazards, chemical
Questions, Answers & Detailed Rationales (Updated 2026) | Fire
Damage Assessment, Smoke & Soot Removal Techniques, Odor Control &
Deodorization, Cleaning Chemicals & Restoration Equipment, Structural
Cleaning Procedures, HVAC Smoke Contamination, Safety Standards,
Restoration Documentation & IICRC Certification Review
Question 1: What are the three essential components required for combustion to
occur, commonly referred to as the fire triangle?
A. Heat, fuel, and nitrogen
B. Heat, fuel, and oxygen
C. Oxygen, carbon dioxide, and heat
D. Fuel, water, and ignition source
CORRECT ANSWER: B. Heat, fuel, and oxygen
Rationale: The fire triangle consists of heat, fuel, and oxygen; all three elements must
be present simultaneously for combustion to occur. Removing any one component will
prevent or extinguish a fire, which is fundamental knowledge for fire restoration
technicians when assessing fire behavior and damage patterns.
Question 2: Which class of fire involves energized electrical equipment and
requires non-conductive extinguishing agents?
A. Class A
B. Class B
C. Class C
D. Class K
CORRECT ANSWER: C. Class C
Rationale: Class C fires involve energized electrical equipment. Non-conductive
extinguishing agents such as carbon dioxide or dry chemical must be used to prevent
electrical shock to the operator. Once the electrical equipment is de-energized, the fire
may be reclassified based on the fuel source.
Question 3: According to ANSI/IICRC S700, what is the primary purpose of
developing a Restoration Work Plan (RWP)?
A. To estimate the total cost of reconstruction
B. To document the scope, methods, and procedures for fire and smoke damage
restoration
C. To assign liability for the fire incident
D. To determine insurance coverage limits
CORRECT ANSWER: B. To document the scope, methods, and procedures for fire
and smoke damage restoration
,Rationale: The ANSI/IICRC S700 Standard requires the development of a Restoration
Work Plan (RWP) to document the assessment findings, restoration objectives, cleaning
methods, deodorization strategies, and verification procedures. This ensures
systematic, consistent, and defensible restoration practices.
Question 4: Which type of smoke residue is typically produced by the slow,
smoldering combustion of natural materials like wood or paper and is
characterized by heavy, black, powdery soot?
A. Wet smoke
B. Dry smoke
C. Protein smoke
D. Fuel oil soot
CORRECT ANSWER: B. Dry smoke
Rationale: Dry smoke results from fast-burning, high-temperature fires involving natural
materials such as wood or paper. It produces fine, powdery, black soot that is relatively
easy to remove with dry cleaning methods. Understanding residue types guides
appropriate cleaning technique selection.
Question 5: What personal protective equipment (PPE) is minimally required when
entering a structure with visible soot contamination and unknown air quality?
A. Safety glasses and gloves only
B. N95 respirator, gloves, and disposable coveralls
C. Full-face respirator with organic vapor cartridges, gloves, coveralls, and eye
protection
D. No PPE required if the structure has been ventilated
CORRECT ANSWER: C. Full-face respirator with organic vapor cartridges, gloves,
coveralls, and eye protection
Rationale: Fire-damaged structures may contain hazardous airborne contaminants
including soot particles, volatile organic compounds (VOCs), and carcinogens.
ANSI/IICRC S700 and OSHA guidelines require appropriate respiratory protection, skin
protection, and eye protection to safeguard technicians during assessment and
restoration activities.
Question 6: Which deodorization method works by chemically altering odor
molecules through oxidation?
A. Adsorption using activated charcoal
B. Thermal fogging
C. Ozone treatment
D. Masking with fragrances
CORRECT ANSWER: C. Ozone treatment
,Rationale: Ozone (O₃) is a powerful oxidizing agent that breaks down odor-causing
molecules by altering their chemical structure. Ozone generators must be used in
unoccupied spaces with proper safety protocols due to respiratory hazards. This
method is effective for penetrating porous materials where odors are trapped.
Question 7: When assessing fire damage, what does the term "soil loading" refer
to?
A. The weight of debris that must be removed from the structure
B. The concentration and distribution of soot and smoke residues on surfaces
C. The amount of water used during fire suppression
D. The structural load capacity after fire exposure
CORRECT ANSWER: B. The concentration and distribution of soot and smoke
residues on surfaces
Rationale: Soil loading describes the density and pattern of smoke and soot deposits
on surfaces. Assessing soil loading helps technicians determine cleaning methods,
estimate labor, and verify cleaning effectiveness. High soil loading may require multiple
cleaning passes or specialized techniques.
Question 8: Which cleaning method is most appropriate for removing dry, powdery
soot from delicate wallpaper without causing damage?
A. Wet cleaning with detergent solution
B. Abrasive scrubbing with steel wool
C. Dry cleaning using a soot sponge or chemical sponge
D. Pressure washing
CORRECT ANSWER: C. Dry cleaning using a soot sponge or chemical sponge
Rationale: Dry cleaning methods such as soot sponges (chemical sponges) are
designed to lift dry, powdery residues without introducing moisture that could damage
sensitive surfaces like wallpaper. Wet methods may cause staining, ink bleeding, or
adhesive failure on delicate materials.
Question 9: What is the primary function of a hydroxyl generator in fire restoration
deodorization?
A. To produce ozone for oxidation of odors
B. To generate hydroxyl radicals that safely oxidize odor molecules in occupied spaces
C. To adsorb odors onto a carbon filter
D. To mask odors with pleasant fragrances
CORRECT ANSWER: B. To generate hydroxyl radicals that safely oxidize odor
molecules in occupied spaces
Rationale: Hydroxyl generators produce hydroxyl radicals (•OH), which are highly
reactive oxidizers that break down odor-causing compounds. Unlike ozone, hydroxyl
, technology can often be used in occupied spaces with proper monitoring, making it
valuable for continuous deodorization during restoration.
Question 10: According to ANSI/IICRC S700, when should test cleaning be
performed during a fire restoration project?
A. Only after all cleaning is complete to verify results
B. Before beginning full-scale cleaning to determine the most effective method for
specific residues and substrates
C. Test cleaning is not required by the standard
D. Only when the client requests it
CORRECT ANSWER: B. Before beginning full-scale cleaning to determine the most
effective method for specific residues and substrates
Rationale: ANSI/IICRC S700 emphasizes test cleaning as a critical step to evaluate
cleaning efficacy, prevent damage, and select appropriate methods for specific residue-
substrate combinations. Results inform the Restoration Work Plan and help avoid costly
rework or substrate damage.
Question 11: Which of the following best describes "protein smoke" residue?
A. Black, powdery soot from burning wood
B. Yellowish-brown, sticky residue with a pungent odor from burning meat or other
proteins
C. Thick, black, oily residue from petroleum-based fuels
D. White, chalky residue from burning plastics
CORRECT ANSWER: B. Yellowish-brown, sticky residue with a pungent odor from
burning meat or other proteins
Rationale: Protein smoke results from the low-temperature, smoldering combustion of
protein-based materials such as meat, fish, or dairy. It produces a tenacious, yellowish-
brown residue with a strong, unpleasant odor that is challenging to remove and often
requires specialized cleaning and deodorization techniques.
Question 12: What is the recommended first step when responding to a fire-
damaged structure?
A. Begin immediate cleaning of visible soot
B. Conduct a thorough safety assessment and hazard identification
C. Remove all contents to an off-site facility
D. Start deodorization with ozone treatment
CORRECT ANSWER: B. Conduct a thorough safety assessment and hazard
identification
Rationale: Safety is paramount in fire restoration. Before any restoration activities
begin, technicians must assess structural integrity, electrical hazards, chemical
