Asbestos Contractor/Supervisor License Exam
2 Questions And Correct Answers (Verified
Answers) Plus Rationales 2025
1. What is the primary health risk associated with asbestos exposure?
A) Lead poisoning
B) Lung cancer and asbestosis
C) Silicosis
D) Mercury poisoning
Answer: B) Lung cancer and asbestosis
Rationale: Asbestos fibers can cause serious lung diseases including asbestosis,
lung cancer, and mesothelioma when inhaled over time.
2. What is the most effective way to control asbestos dust during abatement?
A) Use of wet methods and HEPA-filtered vacuuming
B) Use of leaf blowers to disperse dust
C) Dry sweeping the area
D) Ventilation with open windows
,Answer: A) Use of wet methods and HEPA-filtered vacuuming
Rationale: Wetting asbestos materials reduces airborne fibers, and HEPA
vacuums trap microscopic fibers effectively, reducing worker exposure.
3. Who is required to wear a respirator during asbestos abatement?
A) Only the contractor
B) All workers within the regulated area
C) Visitors only
D) Supervisors only
Answer: B) All workers within the regulated area
Rationale: OSHA regulations require all personnel in the regulated asbestos work
area to wear appropriate respiratory protection to prevent inhalation of fibers.
4. What does the term “friable asbestos” mean?
A) Asbestos mixed with cement
B) Asbestos material that can be crumbled or pulverized by hand
C) Asbestos embedded in vinyl tiles
D) Non-hazardous asbestos-containing material
Answer: B) Asbestos material that can be crumbled or pulverized by hand
Rationale: Friable asbestos is the most hazardous form because it easily releases
fibers into the air when disturbed.
5. What is the purpose of a “decontamination unit” in asbestos abatement?
, A) To store asbestos waste
B) To allow workers to safely remove contaminated clothing and equipment
C) To provide storage for respirators
D) To mix chemicals used in abatement
Answer: B) To allow workers to safely remove contaminated clothing and
equipment
Rationale: Decontamination units help prevent the spread of asbestos fibers by
providing a controlled area for workers to remove contaminated gear.
6. Which agency enforces asbestos standards for workplace safety in the United
States?
A) EPA
B) OSHA
C) DOT
D) FDA
Answer: B) OSHA
Rationale: OSHA (Occupational Safety and Health Administration) regulates
asbestos exposure in workplaces through standards such as 29 CFR 1910.1001.
7. What is the maximum permissible exposure limit (PEL) for asbestos fibers as
per OSHA?
A) 5 fibers per cubic centimeter of air (f/cc)
B) 0.1 fibers per cubic centimeter of air (f/cc)
2 Questions And Correct Answers (Verified
Answers) Plus Rationales 2025
1. What is the primary health risk associated with asbestos exposure?
A) Lead poisoning
B) Lung cancer and asbestosis
C) Silicosis
D) Mercury poisoning
Answer: B) Lung cancer and asbestosis
Rationale: Asbestos fibers can cause serious lung diseases including asbestosis,
lung cancer, and mesothelioma when inhaled over time.
2. What is the most effective way to control asbestos dust during abatement?
A) Use of wet methods and HEPA-filtered vacuuming
B) Use of leaf blowers to disperse dust
C) Dry sweeping the area
D) Ventilation with open windows
,Answer: A) Use of wet methods and HEPA-filtered vacuuming
Rationale: Wetting asbestos materials reduces airborne fibers, and HEPA
vacuums trap microscopic fibers effectively, reducing worker exposure.
3. Who is required to wear a respirator during asbestos abatement?
A) Only the contractor
B) All workers within the regulated area
C) Visitors only
D) Supervisors only
Answer: B) All workers within the regulated area
Rationale: OSHA regulations require all personnel in the regulated asbestos work
area to wear appropriate respiratory protection to prevent inhalation of fibers.
4. What does the term “friable asbestos” mean?
A) Asbestos mixed with cement
B) Asbestos material that can be crumbled or pulverized by hand
C) Asbestos embedded in vinyl tiles
D) Non-hazardous asbestos-containing material
Answer: B) Asbestos material that can be crumbled or pulverized by hand
Rationale: Friable asbestos is the most hazardous form because it easily releases
fibers into the air when disturbed.
5. What is the purpose of a “decontamination unit” in asbestos abatement?
, A) To store asbestos waste
B) To allow workers to safely remove contaminated clothing and equipment
C) To provide storage for respirators
D) To mix chemicals used in abatement
Answer: B) To allow workers to safely remove contaminated clothing and
equipment
Rationale: Decontamination units help prevent the spread of asbestos fibers by
providing a controlled area for workers to remove contaminated gear.
6. Which agency enforces asbestos standards for workplace safety in the United
States?
A) EPA
B) OSHA
C) DOT
D) FDA
Answer: B) OSHA
Rationale: OSHA (Occupational Safety and Health Administration) regulates
asbestos exposure in workplaces through standards such as 29 CFR 1910.1001.
7. What is the maximum permissible exposure limit (PEL) for asbestos fibers as
per OSHA?
A) 5 fibers per cubic centimeter of air (f/cc)
B) 0.1 fibers per cubic centimeter of air (f/cc)
