IICRC Master Restoration Technician
Certification Exam Practice Questions
And Correct Answers (Verified Answers)
Plus Rationales 2026 Q&A | Instant
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1. Which type of water damage is considered the most hazardous due to
potential pathogens?
A. Clean water
B. Grey water
C. Black water
D. Category 1 water
Rationale: Black water (Category 3) is highly contaminated and may
contain sewage, chemicals, or pathogens, posing severe health risks.
2. What is the primary purpose of an anemometer in restoration work?
A. Measure humidity
, B. Detect mold spores
C. Measure air velocity
D. Test water pH
Rationale: An anemometer measures air velocity, helping technicians
assess airflow for drying strategies.
3. Which of the following is the correct initial action for a fire-damaged
structure?
A. Remove all contents immediately
B. Apply deodorizing agents
C. Ensure structural safety and stabilize the scene
D. Begin smoke cleaning
Rationale: Safety comes first; unstable structures must be assessed
and stabilized before cleaning or removal.
4. What is the recommended minimum temperature for drying wood
framing with applied structural drying (ASD)?
A. 50°F
B. 70°F
C. 90°F
D. 100°F
Rationale: A minimum of 70°F is generally required for effective
drying while preventing secondary damage.
5. Which personal protective equipment is required when working in a
Category 3 water environment?
, A. Gloves only
B. Safety glasses
C. Full PPE including respirator, gloves, and protective clothing
D. Ear protection
Rationale: Category 3 water contains hazardous pathogens; full PPE
is mandatory.
6. Which type of carpet cleaning method involves preconditioning the
fibers and using counter-rotation brushes?
A. Encapsulation
B. Bonnet cleaning
C. Hot water extraction
D. Dry compound
Rationale: Bonnet cleaning agitates the carpet fibers to remove
surface soil using a rotary brush and absorbent pad.
7. In mold remediation, which of the following is the primary purpose of
containment?
A. To dry the structure faster
B. To neutralize odors
C. To prevent cross-contamination
D. To increase air movement
Rationale: Containment prevents mold spores from spreading to
unaffected areas during remediation.
, 8. Which of the following is a Class 3 water damage according to IICRC
standards?
A. Water in ceiling cavity only
B. Water affecting a small carpeted area
C. Water contained in concrete slab
D. Water saturation of entire room including walls and floors
Rationale: Class 3 involves significant absorption of water into walls,
ceilings, and subfloors.
9. Which type of fire produces the highest concentration of soot and
smoke residue?
A. Paper fire
B. Gasoline fire
C. Synthetic material fire
D. Wood fire
Rationale: Synthetic materials produce dense, oily smoke that
adheres strongly to surfaces.
10. What is the purpose of a psychrometer in water damage
restoration?
A. Measure water temperature
B. Measure airflow
C. Measure relative humidity and temperature
D. Detect microbial growth
Certification Exam Practice Questions
And Correct Answers (Verified Answers)
Plus Rationales 2026 Q&A | Instant
Download Pdf
1. Which type of water damage is considered the most hazardous due to
potential pathogens?
A. Clean water
B. Grey water
C. Black water
D. Category 1 water
Rationale: Black water (Category 3) is highly contaminated and may
contain sewage, chemicals, or pathogens, posing severe health risks.
2. What is the primary purpose of an anemometer in restoration work?
A. Measure humidity
, B. Detect mold spores
C. Measure air velocity
D. Test water pH
Rationale: An anemometer measures air velocity, helping technicians
assess airflow for drying strategies.
3. Which of the following is the correct initial action for a fire-damaged
structure?
A. Remove all contents immediately
B. Apply deodorizing agents
C. Ensure structural safety and stabilize the scene
D. Begin smoke cleaning
Rationale: Safety comes first; unstable structures must be assessed
and stabilized before cleaning or removal.
4. What is the recommended minimum temperature for drying wood
framing with applied structural drying (ASD)?
A. 50°F
B. 70°F
C. 90°F
D. 100°F
Rationale: A minimum of 70°F is generally required for effective
drying while preventing secondary damage.
5. Which personal protective equipment is required when working in a
Category 3 water environment?
, A. Gloves only
B. Safety glasses
C. Full PPE including respirator, gloves, and protective clothing
D. Ear protection
Rationale: Category 3 water contains hazardous pathogens; full PPE
is mandatory.
6. Which type of carpet cleaning method involves preconditioning the
fibers and using counter-rotation brushes?
A. Encapsulation
B. Bonnet cleaning
C. Hot water extraction
D. Dry compound
Rationale: Bonnet cleaning agitates the carpet fibers to remove
surface soil using a rotary brush and absorbent pad.
7. In mold remediation, which of the following is the primary purpose of
containment?
A. To dry the structure faster
B. To neutralize odors
C. To prevent cross-contamination
D. To increase air movement
Rationale: Containment prevents mold spores from spreading to
unaffected areas during remediation.
, 8. Which of the following is a Class 3 water damage according to IICRC
standards?
A. Water in ceiling cavity only
B. Water affecting a small carpeted area
C. Water contained in concrete slab
D. Water saturation of entire room including walls and floors
Rationale: Class 3 involves significant absorption of water into walls,
ceilings, and subfloors.
9. Which type of fire produces the highest concentration of soot and
smoke residue?
A. Paper fire
B. Gasoline fire
C. Synthetic material fire
D. Wood fire
Rationale: Synthetic materials produce dense, oily smoke that
adheres strongly to surfaces.
10. What is the purpose of a psychrometer in water damage
restoration?
A. Measure water temperature
B. Measure airflow
C. Measure relative humidity and temperature
D. Detect microbial growth
