IICRC Applied Microbial Remediation Technician (AMRT) Certification
Practice Questions and Answers Updated 2026 | Complete Mold
Remediation Study Guide with Verified Questions, Detailed Rationales,
Microbial Contamination, Mold Assessment, Containment Procedures,
HEPA Filtration, Air Scrubbing, Moisture Control, PPE Requirements,
Remediation Safety & IICRC AMRT Exam Prep
Question 1: What does AMRT stand for?
A. Applied Microbial Remediation Technician B. Advanced Mold Removal Technique C.
Applied Mold Restoration Training D. Advanced Microbial Recovery Team
CORRECT ANSWER: A. Applied Microbial Remediation Technician
Rationale: AMRT stands for Applied Microbial Remediation Technician, an IICRC
certification.
Question 2: Which IICRC standard governs mold remediation?
A. S500 B. S520 C. S100 D. S220
CORRECT ANSWER: B. S520
Rationale: The IICRC S520 is the Standard and Reference Guide for Professional Mold
Remediation.
Question 3: What is the primary purpose of containment during mold remediation?
A. To keep workers warm B. To prevent cross-contamination C. To hide the work from
clients D. To increase humidity
CORRECT ANSWER: B. To prevent cross-contamination
Rationale: Containment prevents the spread of mold spores to unaffected areas.
Question 4: Which type of air filtration device is required for mold remediation?
A. Ionic purifier B. Ozone generator C. HEPA filtered air scrubber D. Charcoal filter
CORRECT ANSWER: C. HEPA filtered air scrubber
Rationale: HEPA air scrubbers capture 99.97% of particles at 0.3 microns.
Question 5: What does HEPA stand for?
A. High Efficiency Particulate Air B. High Energy Particle Absorber C. Heavy
Environmental Protection Agency D. Hazardous Exhaust Purification Apparatus
CORRECT ANSWER: A. High Efficiency Particulate Air
Rationale: HEPA stands for High Efficiency Particulate Air.
Question 6: What size particles must a HEPA filter capture at 99.97% efficiency?
A. 10 microns B. 0.3 microns C. 1.0 microns D. 5.0 microns
,CORRECT ANSWER: B. 0.3 microns
Rationale: HEPA filters are tested to capture 99.97% of particles at 0.3 microns.
Question 7: What is the most critical factor for mold growth indoors?
A. Light B. Moisture C. Oxygen D. Nutrients
CORRECT ANSWER: B. Moisture
Rationale: Moisture is the primary limiting factor for indoor mold growth.
Question 8: Which of the following is a common indoor mold genus?
A. Escherichia B. Staphylococcus C. Aspergillus D. Salmonella
CORRECT ANSWER: C. Aspergillus
Rationale: Aspergillus, Penicillium, and Cladosporium are common indoor molds.
Question 9: What is the term for the process of removing mold from an indoor
environment?
A. Mold eradication B. Mold remediation C. Mold elimination D. Mold sterilization
CORRECT ANSWER: B. Mold remediation
Rationale: Mold remediation returns fungal ecology to normal levels; eradication is
impossible.
Question 10: Why is 'mold eradication' considered impossible indoors?
A. Mold spores are too small to see B. Mold spores are always present in the air C. Mold
only grows in dark places D. Mold requires extreme heat to die
CORRECT ANSWER: B. Mold spores are always present in the air
Rationale: Mold spores are ubiquitous in outdoor and indoor air.
Question 11: What is the primary role of an Industrial Hygienist in mold
remediation?
A. To perform the physical removal of mold B. To design the HVAC system C. To provide
independent assessment and clearance testing D. To sell remediation equipment
CORRECT ANSWER: C. To provide independent assessment and clearance testing
Rationale: An independent third party should assess and clear the remediation.
Question 12: What is the minimum level of PPE required for a Level I mold
remediation?
A. Full-face respirator and Tyvek suit B. Half-mask respirator and gloves C. No PPE is
required D. SCBA and chemical suit
CORRECT ANSWER: B. Half-mask respirator and gloves
,Rationale: Level I requires at least an N95 or half-mask respirator with P100 filters and
gloves.
Question 13: In IICRC S520, what defines a Level I remediation?
A. Less than 10 square feet B. 10 to 30 square feet C. 30 to 100 square feet D. More than
100 square feet
CORRECT ANSWER: A. Less than 10 square feet
Rationale: Level I is for areas less than 10 square feet.
Question 14: What defines a Level II remediation in IICRC S520?
A. Less than 10 sq ft B. 10 to 30 sq ft C. 30 to 100 sq ft D. More than 100 sq ft
CORRECT ANSWER: B. 10 to 30 sq ft
Rationale: Level II is for areas between 10 and 30 square feet.
Question 15: What defines a Level III remediation?
A. Less than 10 sq ft B. 10 to 30 sq ft C. 30 to 100 sq ft D. More than 100 sq ft
CORRECT ANSWER: C. 30 to 100 sq ft
Rationale: Level III is for areas between 30 and 100 square feet.
Question 16: What defines a Level IV remediation?
A. Less than 10 sq ft B. 10 to 30 sq ft C. 30 to 100 sq ft D. More than 100 sq ft or HVAC
contamination
CORRECT ANSWER: D. More than 100 sq ft or HVAC contamination
Rationale: Level IV is for areas greater than 100 sq ft or HVAC system contamination.
Question 17: What is the purpose of negative air pressure in containment?
A. To blow contaminants out of the room B. To draw air into the containment area,
preventing escape C. To cool down the workers D. To dry the wet materials faster
CORRECT ANSWER: B. To draw air into the containment area, preventing escape
Rationale: Negative pressure ensures air flows into containment, not out.
Question 18: Which instrument is used to measure negative air pressure?
A. Anemometer B. Magnehelic gauge C. Hygrometer D. Thermometer
CORRECT ANSWER: B. Magnehelic gauge
Rationale: A Magnehelic gauge measures differential pressure.
Question 19: What is the minimum negative pressure required in a containment
area?
, A. 0.01 inches of water column B. 0.02 inches of water column C. 0.10 inches of water
column D. 1.0 inches of water column
CORRECT ANSWER: B. 0.02 inches of water column
Rationale: S520 requires a minimum of -0.02 inches of water column.
Question 20: What is the purpose of an air lock in a containment?
A. To store equipment B. To provide a transition zone to maintain negative pressure C. To
allow natural light in D. To increase humidity
CORRECT ANSWER: B. To provide a transition zone to maintain negative pressure
Rationale: An air lock allows entry/exit without breaking containment pressure.
Question 21: What is a 'Mold Plate'?
A. A physical barrier B. A petri dish used for viable air sampling C. A type of HEPA filter D.
A moisture meter
CORRECT ANSWER: B. A petri dish used for viable air sampling
Rationale: Mold plates are used for viable (culturable) air or surface sampling.
Question 22: What is the primary purpose of surface sampling?
A. To identify the exact species of mold B. To determine if a surface has elevated fungal
particles C. To measure moisture content D. To test air pressure
CORRECT ANSWER: B. To determine if a surface has elevated fungal particles
Rationale: Surface sampling identifies the types and amounts of mold on surfaces.
Question 23: Which sampling method involves pressing tape onto a surface?
A. Bulk sampling B. Tape lift sampling C. Air sampling D. Swab sampling
CORRECT ANSWER: B. Tape lift sampling
Rationale: Tape lifts are used to collect surface samples for microscopy.
Question 24: What is the purpose of a spore trap air sample?
A. To capture viable mold spores B. To capture non-viable spores and particles for count
and identification C. To measure carbon dioxide D. To measure temperature
CORRECT ANSWER: B. To capture non-viable spores and particles for count and
identification
Rationale: Spore traps capture non-viable spores to determine airborne concentrations.
Question 25: What is 'cross-contamination' in mold remediation?
Practice Questions and Answers Updated 2026 | Complete Mold
Remediation Study Guide with Verified Questions, Detailed Rationales,
Microbial Contamination, Mold Assessment, Containment Procedures,
HEPA Filtration, Air Scrubbing, Moisture Control, PPE Requirements,
Remediation Safety & IICRC AMRT Exam Prep
Question 1: What does AMRT stand for?
A. Applied Microbial Remediation Technician B. Advanced Mold Removal Technique C.
Applied Mold Restoration Training D. Advanced Microbial Recovery Team
CORRECT ANSWER: A. Applied Microbial Remediation Technician
Rationale: AMRT stands for Applied Microbial Remediation Technician, an IICRC
certification.
Question 2: Which IICRC standard governs mold remediation?
A. S500 B. S520 C. S100 D. S220
CORRECT ANSWER: B. S520
Rationale: The IICRC S520 is the Standard and Reference Guide for Professional Mold
Remediation.
Question 3: What is the primary purpose of containment during mold remediation?
A. To keep workers warm B. To prevent cross-contamination C. To hide the work from
clients D. To increase humidity
CORRECT ANSWER: B. To prevent cross-contamination
Rationale: Containment prevents the spread of mold spores to unaffected areas.
Question 4: Which type of air filtration device is required for mold remediation?
A. Ionic purifier B. Ozone generator C. HEPA filtered air scrubber D. Charcoal filter
CORRECT ANSWER: C. HEPA filtered air scrubber
Rationale: HEPA air scrubbers capture 99.97% of particles at 0.3 microns.
Question 5: What does HEPA stand for?
A. High Efficiency Particulate Air B. High Energy Particle Absorber C. Heavy
Environmental Protection Agency D. Hazardous Exhaust Purification Apparatus
CORRECT ANSWER: A. High Efficiency Particulate Air
Rationale: HEPA stands for High Efficiency Particulate Air.
Question 6: What size particles must a HEPA filter capture at 99.97% efficiency?
A. 10 microns B. 0.3 microns C. 1.0 microns D. 5.0 microns
,CORRECT ANSWER: B. 0.3 microns
Rationale: HEPA filters are tested to capture 99.97% of particles at 0.3 microns.
Question 7: What is the most critical factor for mold growth indoors?
A. Light B. Moisture C. Oxygen D. Nutrients
CORRECT ANSWER: B. Moisture
Rationale: Moisture is the primary limiting factor for indoor mold growth.
Question 8: Which of the following is a common indoor mold genus?
A. Escherichia B. Staphylococcus C. Aspergillus D. Salmonella
CORRECT ANSWER: C. Aspergillus
Rationale: Aspergillus, Penicillium, and Cladosporium are common indoor molds.
Question 9: What is the term for the process of removing mold from an indoor
environment?
A. Mold eradication B. Mold remediation C. Mold elimination D. Mold sterilization
CORRECT ANSWER: B. Mold remediation
Rationale: Mold remediation returns fungal ecology to normal levels; eradication is
impossible.
Question 10: Why is 'mold eradication' considered impossible indoors?
A. Mold spores are too small to see B. Mold spores are always present in the air C. Mold
only grows in dark places D. Mold requires extreme heat to die
CORRECT ANSWER: B. Mold spores are always present in the air
Rationale: Mold spores are ubiquitous in outdoor and indoor air.
Question 11: What is the primary role of an Industrial Hygienist in mold
remediation?
A. To perform the physical removal of mold B. To design the HVAC system C. To provide
independent assessment and clearance testing D. To sell remediation equipment
CORRECT ANSWER: C. To provide independent assessment and clearance testing
Rationale: An independent third party should assess and clear the remediation.
Question 12: What is the minimum level of PPE required for a Level I mold
remediation?
A. Full-face respirator and Tyvek suit B. Half-mask respirator and gloves C. No PPE is
required D. SCBA and chemical suit
CORRECT ANSWER: B. Half-mask respirator and gloves
,Rationale: Level I requires at least an N95 or half-mask respirator with P100 filters and
gloves.
Question 13: In IICRC S520, what defines a Level I remediation?
A. Less than 10 square feet B. 10 to 30 square feet C. 30 to 100 square feet D. More than
100 square feet
CORRECT ANSWER: A. Less than 10 square feet
Rationale: Level I is for areas less than 10 square feet.
Question 14: What defines a Level II remediation in IICRC S520?
A. Less than 10 sq ft B. 10 to 30 sq ft C. 30 to 100 sq ft D. More than 100 sq ft
CORRECT ANSWER: B. 10 to 30 sq ft
Rationale: Level II is for areas between 10 and 30 square feet.
Question 15: What defines a Level III remediation?
A. Less than 10 sq ft B. 10 to 30 sq ft C. 30 to 100 sq ft D. More than 100 sq ft
CORRECT ANSWER: C. 30 to 100 sq ft
Rationale: Level III is for areas between 30 and 100 square feet.
Question 16: What defines a Level IV remediation?
A. Less than 10 sq ft B. 10 to 30 sq ft C. 30 to 100 sq ft D. More than 100 sq ft or HVAC
contamination
CORRECT ANSWER: D. More than 100 sq ft or HVAC contamination
Rationale: Level IV is for areas greater than 100 sq ft or HVAC system contamination.
Question 17: What is the purpose of negative air pressure in containment?
A. To blow contaminants out of the room B. To draw air into the containment area,
preventing escape C. To cool down the workers D. To dry the wet materials faster
CORRECT ANSWER: B. To draw air into the containment area, preventing escape
Rationale: Negative pressure ensures air flows into containment, not out.
Question 18: Which instrument is used to measure negative air pressure?
A. Anemometer B. Magnehelic gauge C. Hygrometer D. Thermometer
CORRECT ANSWER: B. Magnehelic gauge
Rationale: A Magnehelic gauge measures differential pressure.
Question 19: What is the minimum negative pressure required in a containment
area?
, A. 0.01 inches of water column B. 0.02 inches of water column C. 0.10 inches of water
column D. 1.0 inches of water column
CORRECT ANSWER: B. 0.02 inches of water column
Rationale: S520 requires a minimum of -0.02 inches of water column.
Question 20: What is the purpose of an air lock in a containment?
A. To store equipment B. To provide a transition zone to maintain negative pressure C. To
allow natural light in D. To increase humidity
CORRECT ANSWER: B. To provide a transition zone to maintain negative pressure
Rationale: An air lock allows entry/exit without breaking containment pressure.
Question 21: What is a 'Mold Plate'?
A. A physical barrier B. A petri dish used for viable air sampling C. A type of HEPA filter D.
A moisture meter
CORRECT ANSWER: B. A petri dish used for viable air sampling
Rationale: Mold plates are used for viable (culturable) air or surface sampling.
Question 22: What is the primary purpose of surface sampling?
A. To identify the exact species of mold B. To determine if a surface has elevated fungal
particles C. To measure moisture content D. To test air pressure
CORRECT ANSWER: B. To determine if a surface has elevated fungal particles
Rationale: Surface sampling identifies the types and amounts of mold on surfaces.
Question 23: Which sampling method involves pressing tape onto a surface?
A. Bulk sampling B. Tape lift sampling C. Air sampling D. Swab sampling
CORRECT ANSWER: B. Tape lift sampling
Rationale: Tape lifts are used to collect surface samples for microscopy.
Question 24: What is the purpose of a spore trap air sample?
A. To capture viable mold spores B. To capture non-viable spores and particles for count
and identification C. To measure carbon dioxide D. To measure temperature
CORRECT ANSWER: B. To capture non-viable spores and particles for count and
identification
Rationale: Spore traps capture non-viable spores to determine airborne concentrations.
Question 25: What is 'cross-contamination' in mold remediation?
