OSHA Asbestos Abatement Work
Classifications Class I – Removal of
Insulation and Surfacing Asbestos
Materials Exam Questions With Correct
Answers (Verified Answers) Plus
Rationales 2026 Q&A | Instant
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Question 1
Which work activity is classified as Class I asbestos work?
A. Cleaning floors with asbestos dust
B. Removal of thermal system insulation (TSI) containing
asbestos
C. Handling asbestos-containing flooring adhesive only
D. Inspecting asbestos materials without disturbance
Answer: B
Rationale: Class I asbestos work involves removal of thermal
system insulation and surfacing asbestos-containing materials,
which are the most hazardous forms of asbestos disturbance.
,Question 2
Class I asbestos work primarily involves which material?
A. Non-friable asbestos cement
B. Thermal system insulation (TSI)
C. Painted drywall
D. Vinyl flooring only
Answer: B
Rationale: TSI is the most friable and high-risk asbestos
material, making it the focus of Class I classification.
Question 3
What is the highest hazard category of asbestos work under
OSHA classifications?
A. Class IV
B. Class III
C. Class II
D. Class I
Answer: D
Rationale: Class I is the highest-risk category because it
involves disturbance of friable insulation and surfacing
materials.
,Question 4
Which of the following is required for Class I asbestos work
areas?
A. Open-air work without restriction
B. Negative pressure enclosure
C. No containment if outdoors
D. Standard ventilation only
Answer: B
Rationale: Negative pressure enclosures prevent asbestos
fibers from escaping the work area.
Question 5
What type of respirator is typically required for Class I asbestos
work?
A. Surgical mask
B. Dust mask
C. Half-face air-purifying respirator
D. Full-face respirator with HEPA filters
Answer: D
Rationale: Full-face respirators with HEPA filters provide
necessary protection against airborne asbestos fibers.
, Question 6
Which method is commonly used to reduce asbestos fiber
release in Class I work?
A. Dry sweeping
B. High-pressure air blowing
C. Wet methods
D. Heating the material
Answer: C
Rationale: Wet methods suppress dust and reduce airborne
fiber release during asbestos removal.
Question 7
Who is authorized to perform Class I asbestos work?
A. Any construction worker
B. Only trained and certified asbestos workers
C. Building inspectors only
D. General maintenance staff
Answer: B
Rationale: OSHA requires specific training and certification for
Class I asbestos work due to its high risk.
Classifications Class I – Removal of
Insulation and Surfacing Asbestos
Materials Exam Questions With Correct
Answers (Verified Answers) Plus
Rationales 2026 Q&A | Instant
Download Pdf
Question 1
Which work activity is classified as Class I asbestos work?
A. Cleaning floors with asbestos dust
B. Removal of thermal system insulation (TSI) containing
asbestos
C. Handling asbestos-containing flooring adhesive only
D. Inspecting asbestos materials without disturbance
Answer: B
Rationale: Class I asbestos work involves removal of thermal
system insulation and surfacing asbestos-containing materials,
which are the most hazardous forms of asbestos disturbance.
,Question 2
Class I asbestos work primarily involves which material?
A. Non-friable asbestos cement
B. Thermal system insulation (TSI)
C. Painted drywall
D. Vinyl flooring only
Answer: B
Rationale: TSI is the most friable and high-risk asbestos
material, making it the focus of Class I classification.
Question 3
What is the highest hazard category of asbestos work under
OSHA classifications?
A. Class IV
B. Class III
C. Class II
D. Class I
Answer: D
Rationale: Class I is the highest-risk category because it
involves disturbance of friable insulation and surfacing
materials.
,Question 4
Which of the following is required for Class I asbestos work
areas?
A. Open-air work without restriction
B. Negative pressure enclosure
C. No containment if outdoors
D. Standard ventilation only
Answer: B
Rationale: Negative pressure enclosures prevent asbestos
fibers from escaping the work area.
Question 5
What type of respirator is typically required for Class I asbestos
work?
A. Surgical mask
B. Dust mask
C. Half-face air-purifying respirator
D. Full-face respirator with HEPA filters
Answer: D
Rationale: Full-face respirators with HEPA filters provide
necessary protection against airborne asbestos fibers.
, Question 6
Which method is commonly used to reduce asbestos fiber
release in Class I work?
A. Dry sweeping
B. High-pressure air blowing
C. Wet methods
D. Heating the material
Answer: C
Rationale: Wet methods suppress dust and reduce airborne
fiber release during asbestos removal.
Question 7
Who is authorized to perform Class I asbestos work?
A. Any construction worker
B. Only trained and certified asbestos workers
C. Building inspectors only
D. General maintenance staff
Answer: B
Rationale: OSHA requires specific training and certification for
Class I asbestos work due to its high risk.
