IICRC Mold Remediation Technician (AMRT) Certification Practice
Questions and Answers Updated 2026 | Complete Mold Remediation Study
Guide with Verified Questions, Detailed Rationales, Mold Assessment,
Containment Procedures, HEPA Filtration, Spore Control, Moisture
Intrusion, Air Quality Management, PPE Safety, Decontamination
Protocols & IICRC AMRT Exam Prep
Question 1: What is the primary IICRC standard for mold remediation? A. S500 B.
S520 C. S550 D. S760 CORRECT ANSWER: B. S520 Rationale: The IICRC S520 is the
Standard and Reference Guide for Professional Mold Remediation.
Question 2: What does AMRT stand for? A. Applied Mold Removal Technique B.
Applied Microbial Remediation Technician C. Advanced Mold Remediation Training D.
Applied Moisture Remediation Technician CORRECT ANSWER: B. Applied Microbial
Remediation Technician Rationale: AMRT is the IICRC certification for Applied
Microbial Remediation Technician.
Question 3: What is the primary purpose of containment? A. To dry the area B. To
prevent cross-contamination C. To heat the structure D. To reduce noise CORRECT
ANSWER: B. To prevent cross-contamination Rationale: Containment isolates the
affected area to prevent the spread of mold spores to clean areas.
Question 4: Which PPE is required for Level 1 remediation? A. Full-face respirator B.
N-95 respirator and gloves C. Level A suit D. SCBA CORRECT ANSWER: B. N-95
respirator and gloves Rationale: Level 1 requires minimal PPE, typically an N-95
respirator, gloves, and disposable coveralls.
Question 5: What is the minimum negative air pressure required in containment? A.
Positive pressure B. Neutral pressure C. Negative pressure D. Zero pressure CORRECT
ANSWER: C. Negative pressure Rationale: Containment must maintain negative
pressure so air flows into the work area, not out.
Question 6: What does HEPA stand for? A. High-Efficiency Particulate Air B. High-
Exhaust Particulate Air C. Heavy-Efficiency Particle Air D. High-Efficiency Pollution Air
CORRECT ANSWER: A. High-Efficiency Particulate Air Rationale: HEPA filters capture
99.97% of particles at 0.3 microns.
Question 7: Which tool measures moisture in wood? A. Thermo-hygrometer B.
Moisture meter C. Borescope D. Anemometer CORRECT ANSWER: B. Moisture meter
Rationale: Moisture meters quantify the moisture content within building materials like
wood.
Question 8: What is the primary goal of mold remediation? A. Sterilization B. Mold
removal to normal fungal ecology C. Painting over mold D. Killing all bacteria CORRECT
ANSWER: B. Mold removal to normal fungal ecology Rationale: Remediation returns
mold levels to natural background levels; absolute sterilization is impossible.
,Question 9: Which condition is required for mold growth? A. Sunlight B. Moisture C.
High pH D. Cold temperatures CORRECT ANSWER: B. Moisture Rationale: Mold
requires moisture, organic food, and suitable temperatures to grow.
Question 10: What is a hyphal fragment? A. A mold spore B. A piece of mold filament
C. A type of bacteria D. A cleaning chemical CORRECT ANSWER: B. A piece of mold
filament Rationale: Hyphae are the branching filaments that make up the mycelium of
a mold.
Question 11: What is the purpose of an air scrubber? A. To add moisture B. To filter
airborne particles C. To heat the air D. To measure pressure CORRECT ANSWER: B. To
filter airborne particles Rationale: Air scrubbers use HEPA filtration to remove mold
spores from the air.
Question 12: Which of the following is a mycotoxin? A. Penicillin B. Aflatoxin C.
Streptomycin D. Insulin CORRECT ANSWER: B. Aflatoxin Rationale: Aflatoxin is a toxic
secondary metabolite produced by certain molds like Aspergillus.
Question 13: What is the correct order for donning PPE? A. Gloves, respirator,
coveralls B. Coveralls, respirator, gloves C. Respirator, gloves, coveralls D. Coveralls,
gloves, respirator CORRECT ANSWER: B. Coveralls, respirator, gloves Rationale:
Coveralls first, then respirator to ensure a good seal, then gloves over the sleeves.
Question 14: What is the purpose of a HEPA vacuum? A. To wet the surface B. To
remove dry particulate C. To sand wood D. To apply chemicals CORRECT ANSWER: B.
To remove dry particulate Rationale: HEPA vacuums are used for final cleaning to
remove dry spores and debris.
Question 15: What does a thermo-hygrometer measure? A. Air velocity B.
Temperature and humidity C. Moisture content D. Light levels CORRECT ANSWER: B.
Temperature and humidity Rationale: Thermo-hygrometers measure temperature and
relative humidity to calculate specific humidity and dew point.
Question 16: What is the primary purpose of antimicrobial chemicals? A. To dry the
structure B. To kill or inhibit mold growth C. To seal the surface D. To hide stains
CORRECT ANSWER: B. To kill or inhibit mold growth Rationale: Antimicrobials are
applied to disinfect surfaces and prevent regrowth.
Question 17: What is encapsulation? A. Removing mold B. Sealing mold with a coating
C. Drying the area D. Testing the air CORRECT ANSWER: B. Sealing mold with a
coating Rationale: Encapsulation applies a coating over a surface to trap and seal
residual mold.
Question 18: Which agency regulates respirator use in the workplace? A. EPA B.
OSHA C. FDA D. IICRC CORRECT ANSWER: B. OSHA Rationale: OSHA (Occupational
Safety and Health Administration) sets and enforces respirator standards.
Question 19: What is the minimum filter efficiency for a HEPA filter? A. 50% at 0.5
microns B. 99.97% at 0.3 microns C. 95% at 0.5 microns D. 100% at 1.0 microns
, CORRECT ANSWER: B. 99.97% at 0.3 microns Rationale: HEPA filters must capture
99.97% of particles at the most penetrating particle size of 0.3 microns.
Question 20: What is the purpose of post-remediation verification? A. To sell more
equipment B. To confirm remediation was successful C. To find more mold D. To dry the
structure CORRECT ANSWER: B. To confirm remediation was successful Rationale:
Verification ensures the area meets clearance criteria and is safe for reoccupation.
Question 21: Who should perform post-remediation testing? A. The remediator B. A
third-party assessor C. The homeowner D. The insurance agent CORRECT ANSWER: B.
A third-party assessor Rationale: Third-party assessors avoid conflicts of interest and
provide unbiased clearance.
Question 22: What is the primary cause of indoor mold growth? A. High
temperatures B. Uncontrolled moisture C. Lack of sunlight D. Poor paint quality
CORRECT ANSWER: B. Uncontrolled moisture Rationale: Moisture is the primary
limiting factor for indoor mold growth.
Question 23: Which of the following is an engineering control? A. Washing hands B.
Local exhaust ventilation C. Taking breaks D. Wearing gloves CORRECT ANSWER: B.
Local exhaust ventilation Rationale: Engineering controls isolate the hazard from the
worker, such as negative air containment.
Question 24: What is the purpose of a pass-through box? A. To store tools B. To move
materials in/out of containment C. To measure pressure D. To dispose of waste
CORRECT ANSWER: B. To move materials in/out of containment Rationale: Pass-
through boxes allow materials to enter/exit containment without breaking the air seal.
Question 25: What is the correct method for disposing of moldy debris? A. Open
trash cans B. Sealed in plastic bags C. Burning on site D. Leaving in the containment
CORRECT ANSWER: B. Sealed in plastic bags Rationale: Debris must be double-
bagged and sealed to prevent spore release during transport.
Question 26: What is the purpose of a dehumidifier? A. To add moisture B. To remove
moisture from the air C. To heat the air D. To filter air CORRECT ANSWER: B. To remove
moisture from the air Rationale: Dehumidifiers lower the humidity, creating a drying
environment.
Question 27: Which type of dehumidifier works best in cold climates? A. Refrigerant
B. Desiccant C. Evaporative D. Ventilation CORRECT ANSWER: B. Desiccant Rationale:
Desiccant dehumidifiers are highly effective at low temperatures and low humidity
levels.
Question 28: What is the purpose of an air mover? A. To filter air B. To evaporate
moisture from surfaces C. To heat the room D. To measure humidity CORRECT
ANSWER: B. To evaporate moisture from surfaces Rationale: Air movers increase air
velocity across surfaces, accelerating evaporation.
Questions and Answers Updated 2026 | Complete Mold Remediation Study
Guide with Verified Questions, Detailed Rationales, Mold Assessment,
Containment Procedures, HEPA Filtration, Spore Control, Moisture
Intrusion, Air Quality Management, PPE Safety, Decontamination
Protocols & IICRC AMRT Exam Prep
Question 1: What is the primary IICRC standard for mold remediation? A. S500 B.
S520 C. S550 D. S760 CORRECT ANSWER: B. S520 Rationale: The IICRC S520 is the
Standard and Reference Guide for Professional Mold Remediation.
Question 2: What does AMRT stand for? A. Applied Mold Removal Technique B.
Applied Microbial Remediation Technician C. Advanced Mold Remediation Training D.
Applied Moisture Remediation Technician CORRECT ANSWER: B. Applied Microbial
Remediation Technician Rationale: AMRT is the IICRC certification for Applied
Microbial Remediation Technician.
Question 3: What is the primary purpose of containment? A. To dry the area B. To
prevent cross-contamination C. To heat the structure D. To reduce noise CORRECT
ANSWER: B. To prevent cross-contamination Rationale: Containment isolates the
affected area to prevent the spread of mold spores to clean areas.
Question 4: Which PPE is required for Level 1 remediation? A. Full-face respirator B.
N-95 respirator and gloves C. Level A suit D. SCBA CORRECT ANSWER: B. N-95
respirator and gloves Rationale: Level 1 requires minimal PPE, typically an N-95
respirator, gloves, and disposable coveralls.
Question 5: What is the minimum negative air pressure required in containment? A.
Positive pressure B. Neutral pressure C. Negative pressure D. Zero pressure CORRECT
ANSWER: C. Negative pressure Rationale: Containment must maintain negative
pressure so air flows into the work area, not out.
Question 6: What does HEPA stand for? A. High-Efficiency Particulate Air B. High-
Exhaust Particulate Air C. Heavy-Efficiency Particle Air D. High-Efficiency Pollution Air
CORRECT ANSWER: A. High-Efficiency Particulate Air Rationale: HEPA filters capture
99.97% of particles at 0.3 microns.
Question 7: Which tool measures moisture in wood? A. Thermo-hygrometer B.
Moisture meter C. Borescope D. Anemometer CORRECT ANSWER: B. Moisture meter
Rationale: Moisture meters quantify the moisture content within building materials like
wood.
Question 8: What is the primary goal of mold remediation? A. Sterilization B. Mold
removal to normal fungal ecology C. Painting over mold D. Killing all bacteria CORRECT
ANSWER: B. Mold removal to normal fungal ecology Rationale: Remediation returns
mold levels to natural background levels; absolute sterilization is impossible.
,Question 9: Which condition is required for mold growth? A. Sunlight B. Moisture C.
High pH D. Cold temperatures CORRECT ANSWER: B. Moisture Rationale: Mold
requires moisture, organic food, and suitable temperatures to grow.
Question 10: What is a hyphal fragment? A. A mold spore B. A piece of mold filament
C. A type of bacteria D. A cleaning chemical CORRECT ANSWER: B. A piece of mold
filament Rationale: Hyphae are the branching filaments that make up the mycelium of
a mold.
Question 11: What is the purpose of an air scrubber? A. To add moisture B. To filter
airborne particles C. To heat the air D. To measure pressure CORRECT ANSWER: B. To
filter airborne particles Rationale: Air scrubbers use HEPA filtration to remove mold
spores from the air.
Question 12: Which of the following is a mycotoxin? A. Penicillin B. Aflatoxin C.
Streptomycin D. Insulin CORRECT ANSWER: B. Aflatoxin Rationale: Aflatoxin is a toxic
secondary metabolite produced by certain molds like Aspergillus.
Question 13: What is the correct order for donning PPE? A. Gloves, respirator,
coveralls B. Coveralls, respirator, gloves C. Respirator, gloves, coveralls D. Coveralls,
gloves, respirator CORRECT ANSWER: B. Coveralls, respirator, gloves Rationale:
Coveralls first, then respirator to ensure a good seal, then gloves over the sleeves.
Question 14: What is the purpose of a HEPA vacuum? A. To wet the surface B. To
remove dry particulate C. To sand wood D. To apply chemicals CORRECT ANSWER: B.
To remove dry particulate Rationale: HEPA vacuums are used for final cleaning to
remove dry spores and debris.
Question 15: What does a thermo-hygrometer measure? A. Air velocity B.
Temperature and humidity C. Moisture content D. Light levels CORRECT ANSWER: B.
Temperature and humidity Rationale: Thermo-hygrometers measure temperature and
relative humidity to calculate specific humidity and dew point.
Question 16: What is the primary purpose of antimicrobial chemicals? A. To dry the
structure B. To kill or inhibit mold growth C. To seal the surface D. To hide stains
CORRECT ANSWER: B. To kill or inhibit mold growth Rationale: Antimicrobials are
applied to disinfect surfaces and prevent regrowth.
Question 17: What is encapsulation? A. Removing mold B. Sealing mold with a coating
C. Drying the area D. Testing the air CORRECT ANSWER: B. Sealing mold with a
coating Rationale: Encapsulation applies a coating over a surface to trap and seal
residual mold.
Question 18: Which agency regulates respirator use in the workplace? A. EPA B.
OSHA C. FDA D. IICRC CORRECT ANSWER: B. OSHA Rationale: OSHA (Occupational
Safety and Health Administration) sets and enforces respirator standards.
Question 19: What is the minimum filter efficiency for a HEPA filter? A. 50% at 0.5
microns B. 99.97% at 0.3 microns C. 95% at 0.5 microns D. 100% at 1.0 microns
, CORRECT ANSWER: B. 99.97% at 0.3 microns Rationale: HEPA filters must capture
99.97% of particles at the most penetrating particle size of 0.3 microns.
Question 20: What is the purpose of post-remediation verification? A. To sell more
equipment B. To confirm remediation was successful C. To find more mold D. To dry the
structure CORRECT ANSWER: B. To confirm remediation was successful Rationale:
Verification ensures the area meets clearance criteria and is safe for reoccupation.
Question 21: Who should perform post-remediation testing? A. The remediator B. A
third-party assessor C. The homeowner D. The insurance agent CORRECT ANSWER: B.
A third-party assessor Rationale: Third-party assessors avoid conflicts of interest and
provide unbiased clearance.
Question 22: What is the primary cause of indoor mold growth? A. High
temperatures B. Uncontrolled moisture C. Lack of sunlight D. Poor paint quality
CORRECT ANSWER: B. Uncontrolled moisture Rationale: Moisture is the primary
limiting factor for indoor mold growth.
Question 23: Which of the following is an engineering control? A. Washing hands B.
Local exhaust ventilation C. Taking breaks D. Wearing gloves CORRECT ANSWER: B.
Local exhaust ventilation Rationale: Engineering controls isolate the hazard from the
worker, such as negative air containment.
Question 24: What is the purpose of a pass-through box? A. To store tools B. To move
materials in/out of containment C. To measure pressure D. To dispose of waste
CORRECT ANSWER: B. To move materials in/out of containment Rationale: Pass-
through boxes allow materials to enter/exit containment without breaking the air seal.
Question 25: What is the correct method for disposing of moldy debris? A. Open
trash cans B. Sealed in plastic bags C. Burning on site D. Leaving in the containment
CORRECT ANSWER: B. Sealed in plastic bags Rationale: Debris must be double-
bagged and sealed to prevent spore release during transport.
Question 26: What is the purpose of a dehumidifier? A. To add moisture B. To remove
moisture from the air C. To heat the air D. To filter air CORRECT ANSWER: B. To remove
moisture from the air Rationale: Dehumidifiers lower the humidity, creating a drying
environment.
Question 27: Which type of dehumidifier works best in cold climates? A. Refrigerant
B. Desiccant C. Evaporative D. Ventilation CORRECT ANSWER: B. Desiccant Rationale:
Desiccant dehumidifiers are highly effective at low temperatures and low humidity
levels.
Question 28: What is the purpose of an air mover? A. To filter air B. To evaporate
moisture from surfaces C. To heat the room D. To measure humidity CORRECT
ANSWER: B. To evaporate moisture from surfaces Rationale: Air movers increase air
velocity across surfaces, accelerating evaporation.
