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Asbestos methods of compliance practice questions

20 free practice questions from 29 CFR 1926.1101(g). Each answer is explained and linked to the rule it comes from.

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Asbestos methods of compliance

20 questions across 8 topics. After each answer you see why it is right, with a link to the official source.

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Controls for all operations

  1. 1. An indoor Class III repair job produces a small amount of asbestos-contaminated debris, and exposure measurements are low. Under (g)(1)(iii), how must the employer handle that debris?

    • A. Store it in open piles until the end of the project
    • B. Dry sweep it into ordinary trash bags
    • C. Prompt clean-up and disposal in leak-tight containers
    • D. Leave it in place unless monitoring shows the PEL is exceeded
    Show answer

    Answer: C. Prompt clean-up and disposal in leak-tight containers

    Paragraph (g)(1) applies "in all operations covered by this section, regardless of the levels of exposure" and requires "Prompt clean-up and disposal of wastes and debris contaminated with asbestos in leak-tight containers except in roofing operations".

    Source: eCFR: 29 CFR 1926.1101, Asbestos (as of Nov 4, 2026)

  2. 2. Outside roofing, when does (g)(1)(ii) excuse the employer from using wet methods or wetting agents?

    • A. Where the employer demonstrates that wet methods are infeasible, for example because they would create electrical hazards or cause equipment malfunction
    • B. Where the work is performed outdoors
    • C. Where the employer has produced a negative exposure assessment
    • D. Where a competent person prefers dry methods for speed
    Show answer

    Answer: A. Where the employer demonstrates that wet methods are infeasible, for example because they would create electrical hazards or cause equipment malfunction

    Wet methods are required "except where employers demonstrate that the use of wet methods is infeasible due to for example, the creation of electrical hazards, equipment malfunction".

    Source: eCFR: 29 CFR 1926.1101, Asbestos (as of Nov 4, 2026)

  3. 3. The feasible engineering and work practice controls on a job cannot bring exposure down to the PEL. What does (g)(2)(v) require?

    • A. Stop the job until the controls alone can meet the PEL
    • B. Use the controls to reduce exposure to the lowest levels attainable and supplement them with respiratory protection that complies with paragraph (h)
    • C. Replace the controls with respiratory protection alone
    • D. Rotate employees so that no one exceeds the PEL
    Show answer

    Answer: B. Use the controls to reduce exposure to the lowest levels attainable and supplement them with respiratory protection that complies with paragraph (h)

    The employer "shall use them to reduce employee exposure to the lowest levels attainable by these controls and shall supplement them by the use of respiratory protection that complies with the requirements of paragraph (h) of this section."

    Source: eCFR: 29 CFR 1926.1101, Asbestos (as of Nov 4, 2026)

Prohibited practices

  1. 4. Under (g)(3)(ii), when may compressed air be used to remove asbestos or materials containing asbestos?

    • A. When the material has first been wetted with amended water
    • B. When the employer has a negative exposure assessment for the job
    • C. When the work is performed outdoors
    • D. When it is used in conjunction with an enclosed ventilation system designed to capture the dust cloud it creates
    Show answer

    Answer: D. When it is used in conjunction with an enclosed ventilation system designed to capture the dust cloud it creates

    Compressed air is prohibited "unless the compressed air is used in conjunction with an enclosed ventilation system designed to capture the dust cloud created by the compressed air."

    Source: eCFR: 29 CFR 1926.1101, Asbestos (as of Nov 4, 2026)

  2. 5. A crew plans to cut asbestos-containing panels with a high-speed abrasive disc saw. Under (g)(3)(i), what must the saw be equipped with so that its use is not a prohibited practice?

    • A. A point of cut ventilator or enclosures with HEPA filtered exhaust air
    • B. A blade guard and a cloth dust collection bag
    • C. A speed limiter set below the saw's rated speed
    • D. A label stating that the saw is reserved for asbestos work
    Show answer

    Answer: A. A point of cut ventilator or enclosures with HEPA filtered exhaust air

    Paragraph (g)(3) prohibits, "regardless of measured levels of asbestos exposure", "High-speed abrasive disc saws that are not equipped with point of cut ventilator or enclosures with HEPA filtered exhaust air."

    Source: eCFR: 29 CFR 1926.1101, Asbestos (as of Nov 4, 2026)

Class I requirements

  1. 6. A Class I job is completed outdoors, and no employees are working in areas adjacent to the regulated area. Under the exception in (g)(4)(ii)(B), how is (g)(4)(ii) satisfied?

    • A. When a competent person signs a written waiver
    • B. When the work is finished within one work shift
    • C. When the specific control methods in paragraph (g)(5) are used
    • D. When the HVAC system of the nearest building is shut down
    Show answer

    Answer: C. When the specific control methods in paragraph (g)(5) are used

    The exception says that for such outdoor work "this paragraph (g)(4)(ii) is satisfied when the specific control methods in paragraph (g)(5) of this section are used."

    Source: eCFR: 29 CFR 1926.1101, Asbestos (as of Nov 4, 2026)

  2. 7. When a Class I job relies on another barrier or isolation method verified by perimeter area monitoring, what deadline does (g)(4)(ii)(B) set for making the monitoring results known to the employer?

    • A. No later than 72 hours from the end of the work shift
    • B. No later than 7 days after the job ends
    • C. No later than the end of the job
    • D. No later than 24 hours from the end of the work shift the monitoring represents
    Show answer

    Answer: D. No later than 24 hours from the end of the work shift the monitoring represents

    "The results of such monitoring shall be made known to the employer no later than 24 hours from the end of the work shift represented by such monitoring."

    Source: eCFR: 29 CFR 1926.1101, Asbestos (as of Nov 4, 2026)

  3. 8. Under (g)(4)(vi), on which Class I jobs must the employer ventilate the regulated area to move contaminated air toward a HEPA filtration or collection device?

    • A. Only jobs removing more than 25 linear feet of thermal system insulation
    • B. Jobs where the employer cannot produce a negative exposure assessment, or where exposure monitoring shows a PEL is exceeded
    • C. Only jobs performed inside occupied buildings
    • D. Only jobs where glove bags are used
    Show answer

    Answer: B. Jobs where the employer cannot produce a negative exposure assessment, or where exposure monitoring shows a PEL is exceeded

    The duty applies "For all Class I jobs where the employer cannot produce a negative exposure assessment, or where exposure monitoring shows that a PEL is exceeded".

    Source: eCFR: 29 CFR 1926.1101, Asbestos (as of Nov 4, 2026)

Class I control methods

  1. 9. Under (g)(5)(v), from what may a water spray process system be used to remove ACM and PACM?

    • A. Hot steam lines in service
    • B. Cold line piping
    • C. Built-up roofs with roofing felts
    • D. Vinyl floor tile and its mastic
    Show answer

    Answer: B. Cold line piping

    "A water spray process system may be used for removal of ACM and PACM from cold line piping", if the employees have the required separate training.

    Source: eCFR: 29 CFR 1926.1101, Asbestos (as of Nov 4, 2026)

  2. 10. An employer wants to remove 200 linear feet of thermal system insulation using a control method not referenced in (g)(5). Under (g)(6)(ii), who must evaluate the method and certify in writing that it is adequate?

    • A. A certified industrial hygienist or licensed professional engineer who is also qualified as a project designer
    • B. The competent person who supervises the job
    • C. The building owner or its representative
    • D. Any employee who has completed Class I training
    Show answer

    Answer: A. A certified industrial hygienist or licensed professional engineer who is also qualified as a project designer

    "A certified industrial hygienist or licensed professional engineer who is also qualified as a project designer" must evaluate and "certify in writing"; the evaluation "may be performed by a “competent person”" where the material is "25 linear or 10 square feet or less".

    Source: eCFR: 29 CFR 1926.1101, Asbestos (as of Nov 4, 2026)

Class II requirements

  1. 11. Under (g)(8), Class II work may use a method allowed for Class I work. On what condition are glove bags and glove boxes allowed for Class II work?

    • A. They are used only on thermal system insulation
    • B. They are used inside a negative pressure enclosure
    • C. A certified industrial hygienist approves them in writing
    • D. They fully enclose the Class II material to be removed
    Show answer

    Answer: D. They fully enclose the Class II material to be removed

    Class II work may use a Class I method, "except that glove bags and glove boxes are allowed if they fully enclose the Class II material to be removed."

    Source: eCFR: 29 CFR 1926.1101, Asbestos (as of Nov 4, 2026)

  2. 12. During an indoor Class II job, changed conditions indicate there may be exposure above the PEL. What does (g)(7)(ii) require the employer to do?

    • A. Reclassify the job as Class I and start over
    • B. Notify the building owner before continuing
    • C. Use critical barriers over all openings to the regulated area or another method listed in (g)(7)(ii) to ensure that airborne asbestos does not migrate from the regulated area
    • D. Switch the crew to employees with Class IV training
    Show answer

    Answer: C. Use critical barriers over all openings to the regulated area or another method listed in (g)(7)(ii) to ensure that airborne asbestos does not migrate from the regulated area

    Where "during the job, changed conditions indicate there may be exposure above the PEL", the employer "shall use one of the following methods to ensure that airborne asbestos does not migrate from the regulated area".

    Source: eCFR: 29 CFR 1926.1101, Asbestos (as of Nov 4, 2026)

  3. 13. An employer uses different or modified Class II controls under (g)(8)(vi). Who must evaluate them and certify in writing that they are adequate?

    • A. A competent person
    • B. A licensed professional engineer who is also a project designer
    • C. The OSHA area office
    • D. The building owner
    Show answer

    Answer: A. A competent person

    Under (g)(8)(vi)(B), "A competent person shall evaluate the work area, the projected work practices and the engineering controls, and shall certify in writing".

    Source: eCFR: 29 CFR 1926.1101, Asbestos (as of Nov 4, 2026)

Class II material practices

  1. 14. Under (g)(8)(i)(I), resilient flooring material, including associated mastic and backing, must be assumed to be asbestos-containing unless what happens?

    • A. The building owner states in writing that it is asbestos-free
    • B. An industrial hygienist determines that it is asbestos-free using recognized analytical techniques
    • C. The employer finds no damage during a visual inspection
    • D. The flooring has been in place for less than 10 years
    Show answer

    Answer: B. An industrial hygienist determines that it is asbestos-free using recognized analytical techniques

    Such material "shall be assumed to be asbestos-containing unless an industrial hygienist determines that it is asbestos-free using recognized analytical techniques."

    Source: eCFR: 29 CFR 1926.1101, Asbestos (as of Nov 4, 2026)

  2. 15. A crew repairs several small sections of intact asbestos roofing on one roof in one day. In deciding whether the job is under 25 square feet for (g)(8)(ii)(H), what must the employer include?

    • A. Only the largest single section repaired
    • B. Only the work done by one employee
    • C. All work on every roof of the property that week
    • D. All removal and repair work performed on the same roof on the same day
    Show answer

    Answer: D. All removal and repair work performed on the same roof on the same day

    "In determining whether a job involves less than 25 square feet, the employer shall include all removal and repair work performed on the same roof on the same day."

    Source: eCFR: 29 CFR 1926.1101, Asbestos (as of Nov 4, 2026)

Class III and Class IV work

  1. 16. A Class III job involves drilling through surfacing material. What does (g)(9)(iii) require of the employer?

    • A. Use wet methods only, with no dropcloths or isolation of the operation
    • B. Seal the HVAC system with a double layer of 6 mil plastic
    • C. Use impermeable dropcloths and isolate the operation using mini-enclosures or glove bag systems under (g)(5) or another isolation method
    • D. Use only dry methods so the surfacing material is not saturated
    Show answer

    Answer: C. Use impermeable dropcloths and isolate the operation using mini-enclosures or glove bag systems under (g)(5) or another isolation method

    For drilling and similar disturbance of surfacing material, "the employer shall use impermeable dropcloths, and shall isolate the operation using mini-enclosures or glove bag systems pursuant to paragraph (g)(5) of this section or another isolation method."

    Source: eCFR: 29 CFR 1926.1101, Asbestos (as of Nov 4, 2026)

  2. 17. A Class III job does not disturb thermal system insulation or surfacing material, and the employer has not produced a negative exposure assessment. What does (g)(9)(v) require?

    • A. The employees wear respirators only if monitoring later shows the PEL was exceeded
    • B. The job is reclassified as Class II
    • C. The employees may work without respirators because the job does not disturb thermal system insulation or surfacing material
    • D. The employees wear respirators selected, used and fitted under paragraph (h)
    Show answer

    Answer: D. The employees wear respirators selected, used and fitted under paragraph (h)

    Respirators are required for Class III jobs that disturb TSI or surfacing material "or where the employer does not produce a “negative exposure assessment”".

    Source: eCFR: 29 CFR 1926.1101, Asbestos (as of Nov 4, 2026)

  3. 18. Under (g)(10)(ii), which employers must assume that waste and debris contain asbestos?

    • A. Employers of employees who clean up waste and debris in, and employers in control of, areas where friable thermal system insulation or surfacing material is accessible
    • B. Only employers whose employees perform Class I removal
    • C. Only employers whose monitoring has shown the PEL exceeded
    • D. Only employers working in school buildings
    Show answer

    Answer: A. Employers of employees who clean up waste and debris in, and employers in control of, areas where friable thermal system insulation or surfacing material is accessible

    "Employers of employees who clean up waste and debris in, and employers in control of, areas where friable thermal system insulation or surfacing material is accessible, shall assume that such waste and debris contain asbestos."

    Source: eCFR: 29 CFR 1926.1101, Asbestos (as of Nov 4, 2026)

Roofing and pipeline coating alternative

  1. 19. An employer is removing intact asbestos roof flashings under (g)(11), but during the job the material does not remain intact. What applies then?

    • A. Paragraph (g)(11) still applies because the job began with intact material
    • B. The job must be performed as Class I work in a negative pressure enclosure
    • C. The provisions of paragraph (g)(8) apply instead of (g)(11)
    • D. The employer must stop and notify the building owner before continuing
    Show answer

    Answer: C. The provisions of paragraph (g)(8) apply instead of (g)(11)

    "if during the course of the job the material does not remain intact, the provisions of paragraph (g)(8) of this section apply instead of this paragraph (g)(11)."

    Source: eCFR: 29 CFR 1926.1101, Asbestos (as of Nov 4, 2026)

  2. 20. During (g)(11) operations, roofing products labeled as containing asbestos are installed on a non-residential roof. What must the employer do under (g)(11)(v)?

    • A. Notify OSHA before the job begins
    • B. Notify the building owner of the presence and location of the materials no later than the end of the job
    • C. Post a warning sign at roof level for 30 days
    • D. Give the building owner a copy of the exposure monitoring results
    Show answer

    Answer: B. Notify the building owner of the presence and location of the materials no later than the end of the job

    "the employer shall notify the building owner of the presence and location of such materials no later than the end of the job."

    Source: eCFR: 29 CFR 1926.1101, Asbestos (as of Nov 4, 2026)