Mold Remediation Contractor Certification
Exam Practice With Verified Questions &
Answers | IICRC, ACAC & State Licensing
Prep | Updated | A+ Graded
Question 1
What is a Mold Remediation Protocol?
Correct Answer
Mold remediation work analysis - A document prepared by a licensed mold
assessment consultant for a client that specifies the estimated quantities and
locations of materials to be remediated and the proposed remediation methods.
Question 2
What is indoor mold?
Correct Answer
fungi not purposely grown or brought indoors that have the potential to affect
indoor air quality
Question 3
What are mVocs?
Correct Answer
microbial volatile organic compounds. They are produced by molds and released
into the air often having strong/unpleasant odors. Exposure has been linked to
symptoms such as headaches, nasal irritation, dizziness, fatigue, nausea
Page 1 of 161
,Question 4
Who signs the Certificate of mold remediation?
Correct Answer
The MRC and the MAC
Question 1: According to IICRC S520 standards, which condition defines a material
that has been penetrated by mold growth from a high-humidity or water intrusion
event?
A. Condition 1
B. Condition 2
C. Condition 3
D. Condition 4
CORRECT ANSWER: C. Condition 3
Rationale: Condition 3 refers to an indoor environment or material contaminated
with a significant accumulation of mold, where visible fungal growth, settled spores,
or hyphae are present on surfaces and structural materials.
Question 2: What is the primary purpose of establishing negative pressure within a
mold remediation containment area?
A. To dry out the structural materials faster
B. To prevent airborne fungal spores and particulate from escaping into unaffected
clean areas
C. To reduce the ambient temperature inside the work zone
D. To eliminate the need for personal protective equipment (PPE)
CORRECT ANSWER: B. Provider of containment isolation
Rationale: Negative air pressure ensures that air flows inward from clean spaces into
the containment workspace, preventing airborne mold spores and mycotoxins from
migrating to uncontaminated sections of the building.
Question 3: Which type of Personal Protective Equipment (PPE) filter is minimally
required for workers performing remediation work in a medium-to-large Condition 3
containment area?
A. N95 respirator
Page 2 of 161
,B. Surgical mask
C. P100 half-face or full-face elastomeric respirator
D. Dust mask with activated charcoal
CORRECT ANSWER: C. P100 half-face or full-face elastomeric respirator
Rationale: According to standard industry guidelines (such as IICRC S520 and OSHA
recommendations), P100 particulate filters (or PAPRs with HEPA filters) are required
for handling mold-contaminated materials to block microscopic fungal spores.
Question 4: What is the most critical initial step before beginning any physical mold
remediation or containment setup?
A. Applying biocides to all visible surfaces
B. Identifying and stopping the source of moisture intrusion
C. Tearing down all drywall in the affected rooms
D. Running air scrubbers for exactly 48 hours without containment
CORRECT ANSWER: B. Identifying and stopping the source of moisture intrusion
Rationale: Without resolving the underlying moisture source (such as a plumbing
leak, roof failure, or high relative humidity), mold will inevitably return even after
thorough physical cleaning and removal.
Question 5: Which instrument is best utilized to detect hidden moisture behind
finished walls without causing physical damage to the substrate?
A. Non-penetrating (capacitance/electromagnetic) moisture meter
B. Standard claw hammer
C. Infrared thermometer only
D. Standard analog stopwatch
CORRECT ANSWER: A. Non-penetrating (capacitance/electromagnetic) moisture
meter
Rationale: Non-penetrating meters use radio frequency signals to scan subsurface
moisture levels rapidly without puncturing drywall, wallpaper, or finished wood
surfaces.
Question 6: What term describes an indoor environment that is primarily free of
settled spores, dust, and fungal fragments, representing normal baseline conditions?
Page 3 of 161
, A. Condition 1
B. Condition 2
C. Condition 3
D. Condition 4
CORRECT ANSWER: A. Condition 1
Rationale: Condition 1 designates a normal, clean indoor environment where the
concentration and dispersion of airborne and surface fungal ecology correspond to
expected outdoor or clean indoor baselines.
Question 7: When constructing a critical containment barrier using polyethylene
sheeting, what tape is typically utilized to secure the plastic to framing and prevent air
leaks?
A. Standard blue painter's tape
B. General-purpose office scotch tape
C. Reinforced duct tape or specialized construction-grade containment tape
D. Paper masking tape
CORRECT ANSWER: C. Reinforced duct tape or specialized construction-grade
containment tape
Rationale: High-adhesion containment tape or heavy-duty reinforced tape is
necessary to create an airtight seal between plastic sheeting and structural surfaces
under negative air pressure.
Question 8: What is the standard minimum number of air changes per hour (ACH)
typically recommended for a negative pressure containment enclosure during mold
remediation?
A. 1 to 2 air changes per hour
B. 4 air changes per hour
C. At least 4 air changes per hour, often targeted around 6 or more
D. Exactly 20 air changes per hour
CORRECT ANSWER: C. At least 4 air changes per hour, often targeted around 6 or
more
Page 4 of 161
Exam Practice With Verified Questions &
Answers | IICRC, ACAC & State Licensing
Prep | Updated | A+ Graded
Question 1
What is a Mold Remediation Protocol?
Correct Answer
Mold remediation work analysis - A document prepared by a licensed mold
assessment consultant for a client that specifies the estimated quantities and
locations of materials to be remediated and the proposed remediation methods.
Question 2
What is indoor mold?
Correct Answer
fungi not purposely grown or brought indoors that have the potential to affect
indoor air quality
Question 3
What are mVocs?
Correct Answer
microbial volatile organic compounds. They are produced by molds and released
into the air often having strong/unpleasant odors. Exposure has been linked to
symptoms such as headaches, nasal irritation, dizziness, fatigue, nausea
Page 1 of 161
,Question 4
Who signs the Certificate of mold remediation?
Correct Answer
The MRC and the MAC
Question 1: According to IICRC S520 standards, which condition defines a material
that has been penetrated by mold growth from a high-humidity or water intrusion
event?
A. Condition 1
B. Condition 2
C. Condition 3
D. Condition 4
CORRECT ANSWER: C. Condition 3
Rationale: Condition 3 refers to an indoor environment or material contaminated
with a significant accumulation of mold, where visible fungal growth, settled spores,
or hyphae are present on surfaces and structural materials.
Question 2: What is the primary purpose of establishing negative pressure within a
mold remediation containment area?
A. To dry out the structural materials faster
B. To prevent airborne fungal spores and particulate from escaping into unaffected
clean areas
C. To reduce the ambient temperature inside the work zone
D. To eliminate the need for personal protective equipment (PPE)
CORRECT ANSWER: B. Provider of containment isolation
Rationale: Negative air pressure ensures that air flows inward from clean spaces into
the containment workspace, preventing airborne mold spores and mycotoxins from
migrating to uncontaminated sections of the building.
Question 3: Which type of Personal Protective Equipment (PPE) filter is minimally
required for workers performing remediation work in a medium-to-large Condition 3
containment area?
A. N95 respirator
Page 2 of 161
,B. Surgical mask
C. P100 half-face or full-face elastomeric respirator
D. Dust mask with activated charcoal
CORRECT ANSWER: C. P100 half-face or full-face elastomeric respirator
Rationale: According to standard industry guidelines (such as IICRC S520 and OSHA
recommendations), P100 particulate filters (or PAPRs with HEPA filters) are required
for handling mold-contaminated materials to block microscopic fungal spores.
Question 4: What is the most critical initial step before beginning any physical mold
remediation or containment setup?
A. Applying biocides to all visible surfaces
B. Identifying and stopping the source of moisture intrusion
C. Tearing down all drywall in the affected rooms
D. Running air scrubbers for exactly 48 hours without containment
CORRECT ANSWER: B. Identifying and stopping the source of moisture intrusion
Rationale: Without resolving the underlying moisture source (such as a plumbing
leak, roof failure, or high relative humidity), mold will inevitably return even after
thorough physical cleaning and removal.
Question 5: Which instrument is best utilized to detect hidden moisture behind
finished walls without causing physical damage to the substrate?
A. Non-penetrating (capacitance/electromagnetic) moisture meter
B. Standard claw hammer
C. Infrared thermometer only
D. Standard analog stopwatch
CORRECT ANSWER: A. Non-penetrating (capacitance/electromagnetic) moisture
meter
Rationale: Non-penetrating meters use radio frequency signals to scan subsurface
moisture levels rapidly without puncturing drywall, wallpaper, or finished wood
surfaces.
Question 6: What term describes an indoor environment that is primarily free of
settled spores, dust, and fungal fragments, representing normal baseline conditions?
Page 3 of 161
, A. Condition 1
B. Condition 2
C. Condition 3
D. Condition 4
CORRECT ANSWER: A. Condition 1
Rationale: Condition 1 designates a normal, clean indoor environment where the
concentration and dispersion of airborne and surface fungal ecology correspond to
expected outdoor or clean indoor baselines.
Question 7: When constructing a critical containment barrier using polyethylene
sheeting, what tape is typically utilized to secure the plastic to framing and prevent air
leaks?
A. Standard blue painter's tape
B. General-purpose office scotch tape
C. Reinforced duct tape or specialized construction-grade containment tape
D. Paper masking tape
CORRECT ANSWER: C. Reinforced duct tape or specialized construction-grade
containment tape
Rationale: High-adhesion containment tape or heavy-duty reinforced tape is
necessary to create an airtight seal between plastic sheeting and structural surfaces
under negative air pressure.
Question 8: What is the standard minimum number of air changes per hour (ACH)
typically recommended for a negative pressure containment enclosure during mold
remediation?
A. 1 to 2 air changes per hour
B. 4 air changes per hour
C. At least 4 air changes per hour, often targeted around 6 or more
D. Exactly 20 air changes per hour
CORRECT ANSWER: C. At least 4 air changes per hour, often targeted around 6 or
more
Page 4 of 161
