OSHA Asbestos Work Classification
Codes (Field Work Categories) Exam
Questions With Correct Answers
(Verified Answers) Plus Rationales 2026
Q&A | Instant Download Pdf
1.
Which of the following best defines Class I asbestos work?
A. Maintenance work on non-friable asbestos materials
B. Removal of thermal system insulation and surfacing
ACM/PACM
C. Cleanup of asbestos-containing debris only
D. Work on asbestos-containing flooring materials only
Correct Answer: B
Rationale: Class I asbestos work involves the removal of
thermal system insulation (TSI) and surfacing asbestos-
containing or presumed asbestos-containing materials, which
are the most hazardous categories.
2.
,Class I asbestos work primarily involves which type of material?
A. Asbestos-cement pipe
B. Vinyl floor tile
C. Thermal system insulation
D. Roofing materials
Correct Answer: C
Rationale: Thermal system insulation is a primary focus of
Class I work due to its high friability and risk of fiber release.
3.
Which activity is always classified as Class I work?
A. Repair of asbestos flooring
B. Removal of sprayed-on fireproofing
C. Encapsulation of roofing materials
D. Drilling holes in asbestos cement sheets
Correct Answer: B
Rationale: Sprayed-on fireproofing is surfacing material and
its removal is explicitly Class I asbestos work.
4.
What is a key hazard of Class I asbestos work?
,A. Low dust generation
B. High fiber release potential
C. No airborne contamination risk
D. Only surface contamination
Correct Answer: B
Rationale: Class I work involves friable materials that easily
release airborne asbestos fibers.
5.
Which PPE is most appropriate for Class I asbestos work?
A. Surgical mask only
B. No respiratory protection
C. Full-face respirator with HEPA filters
D. Cloth dust mask
Correct Answer: C
Rationale: Class I work requires high-level respiratory
protection such as a full-face respirator equipped with HEPA
filtration due to high exposure risk.
6.
Which material is considered surfacing ACM in Class I work?
, A. Pipe insulation covering
B. Floor tile adhesive
C. Spray-applied fireproofing
D. Roofing shingles
Correct Answer: C
Rationale: Spray-applied fireproofing is a surfacing material
commonly handled in Class I asbestos operations.
7.
Which of the following is NOT Class I work?
A. Removal of pipe insulation
B. Removal of sprayed insulation
C. Cleaning debris from asbestos demolition
D. Removal of surfacing ACM
Correct Answer: C
Rationale: Debris cleanup alone is generally Class II or III
depending on conditions, not Class I.
8.
Who is authorized to perform Class I asbestos work?
A. Any construction worker
B. Only trained and certified asbestos workers
Codes (Field Work Categories) Exam
Questions With Correct Answers
(Verified Answers) Plus Rationales 2026
Q&A | Instant Download Pdf
1.
Which of the following best defines Class I asbestos work?
A. Maintenance work on non-friable asbestos materials
B. Removal of thermal system insulation and surfacing
ACM/PACM
C. Cleanup of asbestos-containing debris only
D. Work on asbestos-containing flooring materials only
Correct Answer: B
Rationale: Class I asbestos work involves the removal of
thermal system insulation (TSI) and surfacing asbestos-
containing or presumed asbestos-containing materials, which
are the most hazardous categories.
2.
,Class I asbestos work primarily involves which type of material?
A. Asbestos-cement pipe
B. Vinyl floor tile
C. Thermal system insulation
D. Roofing materials
Correct Answer: C
Rationale: Thermal system insulation is a primary focus of
Class I work due to its high friability and risk of fiber release.
3.
Which activity is always classified as Class I work?
A. Repair of asbestos flooring
B. Removal of sprayed-on fireproofing
C. Encapsulation of roofing materials
D. Drilling holes in asbestos cement sheets
Correct Answer: B
Rationale: Sprayed-on fireproofing is surfacing material and
its removal is explicitly Class I asbestos work.
4.
What is a key hazard of Class I asbestos work?
,A. Low dust generation
B. High fiber release potential
C. No airborne contamination risk
D. Only surface contamination
Correct Answer: B
Rationale: Class I work involves friable materials that easily
release airborne asbestos fibers.
5.
Which PPE is most appropriate for Class I asbestos work?
A. Surgical mask only
B. No respiratory protection
C. Full-face respirator with HEPA filters
D. Cloth dust mask
Correct Answer: C
Rationale: Class I work requires high-level respiratory
protection such as a full-face respirator equipped with HEPA
filtration due to high exposure risk.
6.
Which material is considered surfacing ACM in Class I work?
, A. Pipe insulation covering
B. Floor tile adhesive
C. Spray-applied fireproofing
D. Roofing shingles
Correct Answer: C
Rationale: Spray-applied fireproofing is a surfacing material
commonly handled in Class I asbestos operations.
7.
Which of the following is NOT Class I work?
A. Removal of pipe insulation
B. Removal of sprayed insulation
C. Cleaning debris from asbestos demolition
D. Removal of surfacing ACM
Correct Answer: C
Rationale: Debris cleanup alone is generally Class II or III
depending on conditions, not Class I.
8.
Who is authorized to perform Class I asbestos work?
A. Any construction worker
B. Only trained and certified asbestos workers
