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MD Asbestos Abatement practice questions

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Question 1Physical characteristics of asbestos and health effects

Which asbestos mineral is classified as a serpentine mineral and typically forms curly, wavy fiber bundles?

  1. Amosite
  2. Crocidolite
  3. Chrysotile Correct answer.
  4. Anthophyllite

Explanation

Chrysotile is the only serpentine asbestos mineral; its sheet-like crystal structure rolls into curly fibers. Amosite, crocidolite, and anthophyllite are amphibole asbestos minerals, which generally form straighter, rod-like fibers.

Question 2Physical characteristics of asbestos and health effects

Chronic scarring of lung tissue caused by inhaled asbestos fibers, often producing breathlessness and reduced lung function, is called:

  1. Pleural plaque
  2. Mesothelioma
  3. Asbestosis Correct answer.
  4. Lung cancer

Explanation

Asbestosis is diffuse interstitial fibrosis of the lung caused by asbestos inhalation and can impair gas exchange. Mesothelioma is a cancer of the pleura or peritoneum, while a pleural plaque is a localized fibrous thickening rather than diffuse lung scarring.

Question 3Physical characteristics of asbestos and health effects

For asbestos-related mesothelioma, the typical latency period between first substantial exposure and diagnosis is:

  1. 60 to 80 years
  2. 5 to 10 years
  3. 20 to 40 years Correct answer.
  4. 1 to 5 years

Explanation

Mesothelioma usually appears decades after asbestos exposure, with a typical latency of about 20 to 40 years. Shorter intervals are uncommon, although very long latencies can also occur.

Question 4Physical characteristics of asbestos and health effects

Which fiber geometry is most often associated with deposition in the deep lung and slow clearance?

  1. Thick, long fibers
  2. Thin, long fibers Correct answer.
  3. Thick, short fibers
  4. Thin, short fibers

Explanation

Thin fibers can pass through airway bends and reach the alveolar region, while long fibers are difficult for macrophages to engulf and clear. The combination of small diameter and long length therefore favors deep lung deposition and retention.

Question 5Physical characteristics of asbestos and health effects

Which asbestos variety has the strongest epidemiologic association with mesothelioma, particularly in mining and milling cohorts?

  1. Crocidolite Correct answer.
  2. Tremolite
  3. Amosite
  4. Chrysotile

Explanation

Crocidolite, an amphibole asbestos often called blue asbestos, has the strongest epidemiologic association with mesothelioma. All asbestos types can cause mesothelioma, but crocidolite is generally regarded as the most potent for this cancer.

Question 6Physical characteristics of asbestos and health effects

A nonsmoking worker with asbestos exposure asks how cigarette smoking would change disease risk. Which statement is most accurate?

  1. Smoking and asbestos add risk with no interaction.
  2. Smoking and asbestos multiply lung cancer risk synergistically. Correct answer.
  3. Smoking raises only mesothelioma risk, not lung cancer risk.
  4. Smoking lowers lung fiber burden and reduces cancer risk.

Explanation

Cigarette smoking and asbestos exposure interact synergistically for lung cancer, producing a risk much greater than either exposure alone. Smoking is not established as a cause of mesothelioma, and it does not protect against asbestos-related disease.

Question 7Physical characteristics of asbestos and health effects

What is the usual clinical significance of pleural plaques in a worker with past asbestos exposure?

  1. They are infectious lesions caused by bacteria.
  2. They prove active asbestosis is present.
  3. They are precancerous lesions that always become mesothelioma.
  4. They are usually asymptomatic exposure markers, not malignancies. Correct answer.

Explanation

Pleural plaques are localized fibrous thickenings of the pleura that often calcify and indicate prior asbestos exposure. They are not themselves malignant and can occur without asbestosis, although they may prompt further medical evaluation.

Question 8Physical characteristics of asbestos and health effects

Why are amphibole asbestos fibers generally considered more hazardous than chrysotile fibers for long-term lung disease?

  1. Amphibole fibers are cleared completely by mucociliary transport within hours.
  2. Amphibole fibers dissolve rapidly in lung fluid and release harmless products.
  3. Amphibole fibers are too curly to enter the lung.
  4. Amphibole fibers resist dissolution and remain in lung tissue longer. Correct answer.

Explanation

Amphibole fibers have durable crystalline structures and low solubility, so they tend to persist in lung tissue for long periods. Chrysotile fibers are more soluble and are cleared more readily, although chrysotile is still a hazardous asbestos fiber.

Question 9Physical characteristics of asbestos and health effects

Which statement best explains why asbestos fibers longer than about 10 micrometers are especially pathogenic?

  1. They are completely engulfed and neutralized by one macrophage.
  2. They cannot be fully engulfed, causing frustrated phagocytosis. Correct answer.
  3. They dissolve rapidly after alveolar deposition.
  4. They are too short to deposit in the lung.

Explanation

Long asbestos fibers cannot be completely engulfed by alveolar macrophages, so the cells release inflammatory mediators and oxidants in a process called frustrated phagocytosis. This persistent inflammation and impaired clearance contribute to fibrosis and carcinogenesis.

Question 10Physical characteristics of asbestos and health effects

After inhalation, how are asbestos fibers deposited in the tracheobronchial airways primarily removed?

  1. By dissolution in pleural fluid.
  2. By mucociliary transport toward the pharynx. Correct answer.
  3. By coughing up alveolar macrophages immediately.
  4. By direct absorption into the bloodstream within minutes.

Explanation

Fibers trapped in mucus on the conducting airways are moved upward by ciliary action and then swallowed or expectorated. Fibers that reach the alveoli are cleared more slowly by macrophages and lymphatic transport rather than by the mucociliary escalator.

Question 11Physical characteristics of asbestos and health effects

Under the fiber-counting rules used for airborne asbestos monitoring by phase contrast microscopy, a particle is counted as a fiber only when it meets which set of criteria?

  1. Length greater than 5 µm, diameter less than 3 µm, and a length-to-diameter ratio of at least 3:1 Correct answer.
  2. Length greater than 10 µm, diameter less than 1 µm, and a length-to-diameter ratio of at least 10:1
  3. Any elongated particle seen on the filter, regardless of its dimensions
  4. Length greater than 2 µm, diameter less than 5 µm, and a length-to-diameter ratio of at least 2:1

Explanation

The counting convention used in membrane-filter phase contrast microscopy defines a fiber as a particle longer than 5 µm with a diameter under 3 µm and an aspect ratio of at least 3:1. These dimensions approximate the range that can reach the deep lung and remain there long enough to matter biologically. Particles outside this range are not counted even if they are asbestos.

Question 12Physical characteristics of asbestos and health effects

Which option correctly assigns the six regulated asbestos minerals to their mineral families?

  1. Serpentine: chrysotile. Amphibole: amosite, crocidolite, tremolite, anthophyllite, actinolite. Correct answer.
  2. Serpentine: amosite and crocidolite. Amphibole: chrysotile, tremolite, actinolite, anthophyllite.
  3. Serpentine: chrysotile and actinolite. Amphibole: amosite, crocidolite, tremolite, anthophyllite.
  4. Serpentine: chrysotile and anthophyllite. Amphibole: amosite, crocidolite, tremolite, actinolite.

Explanation

Chrysotile is the only serpentine asbestos mineral; the remaining five regulated varieties are amphiboles. Because the two families differ in crystal structure, they also differ in fiber shape, chemical durability, and how long fibers persist in tissue after inhalation.

Question 13Physical characteristics of asbestos and health effects

In asbestos abatement work, a material is described as friable when it:

  1. Is bound in a cement matrix that resists damage during routine use
  2. Releases fibers only when cut or sanded with power tools
  3. Can be crumbled, pulverized, or reduced to powder by hand pressure when dry Correct answer.
  4. Contains more than one percent asbestos by weight within a binding matrix

Explanation

Friability describes how easily a material can be broken down by hand pressure and therefore how readily it releases fibers into air. Friable materials such as sprayed insulation or damaged pipe lagging present a much higher airborne fiber potential than firmly bound products. The asbestos content percentage and the binding matrix are separate considerations from friability.

Question 14Physical characteristics of asbestos and health effects

A relatively large fiber, about 20 µm long and 1 µm in diameter, is inhaled. Which mechanism most likely deposits it in the conducting airways?

  1. Brownian diffusion against the airway wall
  2. Electrostatic attraction to the mucosal surface
  3. Inertial impaction where the airstream splits at airway bifurcations Correct answer.
  4. Gravitational settling within the alveoli

Explanation

Large fibers have enough momentum that they cannot follow the sharply curving airstream at airway bifurcations and strike the wall, which is inertial impaction. Diffusion dominates for very small particles, and alveolar sedimentation matters for fibers that reach the distal lung. This is why the largest fibers are often deposited in the upper and central airways rather than at the pleura.

Question 15Physical characteristics of asbestos and health effects

Chrysotile from a particular mining region has been linked to mesothelioma rates far higher than those seen with chrysotile elsewhere. Which explanation is best supported?

  1. The ore there contains quartz, and crystalline silica is the established cause of mesothelioma
  2. The chrysotile there is contaminated with tremolite, an amphibole that persists in lung tissue Correct answer.
  3. That chrysotile has an unusually curly morphology that penetrates the pleura more easily
  4. The mine dust there consisted almost entirely of short fibers that macrophages cannot clear

Explanation

Several chrysotile deposits contain tremolite, an amphibole that is far more biopersistent than chrysotile and is itself a recognized mesothelioma hazard. Studies of contaminated districts attribute much of the excess risk to the amphibole fraction rather than to chrysotile itself. This distinction matters when interpreting exposure histories from mining or milling operations.

Question 16Physical characteristics of asbestos and health effects

In addition to lung cancer and mesothelioma, which cancers are recognized by major cancer agencies as caused by asbestos exposure?

  1. Stomach and colon
  2. Liver and kidney
  3. Bladder and brain
  4. Larynx and ovary Correct answer.

Explanation

The International Agency for Research on Cancer classifies asbestos as carcinogenic to humans on the basis of lung cancer, mesothelioma, laryngeal cancer, and ovarian cancer. The larynx and ovary are therefore the additional sites most consistently supported by epidemiologic evidence. Other sites such as the colorectum and stomach remain inconclusive.

Question 17Physical characteristics of asbestos and health effects

A pathologist reports ferruginous bodies in lung tissue from a former shipyard worker. Which statement about these structures is accurate?

  1. They are bare fibers that have lost their protein coating after years of residence in the lung
  2. They are iron-coated fibers that can also form on non-asbestos minerals, so they do not by themselves prove asbestos exposure Correct answer.
  3. They form only on chrysotile and their presence demonstrates exposure within the past few weeks
  4. They are the mineral form in which fibers are exhaled after mucociliary clearance from the airways

Explanation

Ferruginous bodies are fibers encrusted with iron-rich protein, and they can develop on erionite, fibrous glass, or other elongated particles as well as on asbestos. Only when the core is confirmed to be asbestos is the term asbestos body appropriate. Their presence indicates retained fibrous dust, not the timing or the specific mineral type of exposure.

Question 18Physical characteristics of asbestos and health effects

How do inhaled asbestos fibers most plausibly reach the parietal pleura, where mesothelioma arises?

  1. They are swallowed and reach the pleura by crossing the gut wall
  2. They migrate back up the airways and enter the pleural cavity from the trachea
  3. They are carried in blood from the lung to the pleural capillaries
  4. They penetrate the visceral pleura and travel through lymphatics and the pleural space Correct answer.

Explanation

Long, thin fibers that deposit near the lung periphery can penetrate the visceral pleura and then move through pleural lymphatics and the pleural space to reach the parietal pleura. This direct translocation, rather than transport by blood, is the mechanism most consistent with the distribution of pleural tumors. The same fibers also generate chronic local inflammation at the mesothelial surface.

Question 19Physical characteristics of asbestos and health effects

Mesothelioma typically appears decades after a documented exposure, even though fibers are retained in tissue from the time of inhalation. Which explanation best accounts for this long latency?

  1. Fibers cause disease only after they break into short fragments that diffuse into the pleura
  2. Fibers remain biologically inert until they eventually dissolve and release their components
  3. The immune system gradually converts engulfed fibers into iron complexes that become carcinogenic
  4. Repeated fiber-driven inflammation, oxidative injury, and disturbed cell division let mutations accumulate over years Correct answer.

Explanation

Retained fibers provoke chronic inflammation and generate reactive oxygen species, while their physical presence interferes with chromosome segregation during cell division. Each round of injury and repair adds mutations, so a malignant clone emerges only after many years of cumulative damage. This multistep process explains why disease appears long after exposure has ended.

Question 20Physical characteristics of asbestos and health effects

Why do industrial hygienists evaluate asbestos exposure by counting fibers rather than by measuring total airborne mass?

  1. Risk tracks fiber number, and thin fibers add very little mass each Correct answer.
  2. Counting fibers under a microscope is faster and cheaper per sample than weighing filter samples
  3. The total mass of airborne fibers in buildings is usually below the detection limit of analytical balances
  4. Gravimetric samplers are too bulky to use in most occupied buildings during abatement work

Explanation

Toxicologically relevant dose is the number of long, thin, respirable fibers retained in the lung, and a small mass of very fine fibers can represent an enormous fiber count. Mass measurement therefore underestimates hazard when fibers are thin and overestimates it when particles are coarse and nonfibrous. Fiber counting, while method-dependent, aligns the metric with the dose that drives disease.

Question 21Physical characteristics of asbestos and health effects

Which physical property of asbestos minerals most directly accounts for their historical use in woven fire blankets and thermal insulation?

  1. Rapid dissolution in water and body fluids
  2. Splitting into long, flexible fibrils Correct answer.
  3. Uniform spherical particle shape
  4. High specific gravity that increases weight per volume

Explanation

Asbestos minerals separate into durable fibrils that can be spun, woven, and used where flexibility plus heat resistance are needed. That fibrous habit, not high density or rapid dissolution, explains products such as fire blankets and insulation.

Question 22Physical characteristics of asbestos and health effects

After asbestos fibers reach the alveolar region, which cell type is primarily responsible for attempting to remove them?

  1. Type II pneumocytes
  2. Ciliated columnar epithelial cells
  3. Alveolar macrophages Correct answer.
  4. Pleural mesothelial cells

Explanation

Alveolar macrophages phagocytose particles that reach the gas-exchange region. Fibers too long to be fully engulfed may trigger frustrated phagocytosis and chronic inflammation instead of effective clearance.

Question 23Physical characteristics of asbestos and health effects

A worker with long-term asbestos exposure has no malignancy but shows increasing breathlessness. Which pulmonary function pattern is most consistent with asbestosis?

  1. Mixed pattern caused by acute bronchospasm
  2. Normal spirometry with isolated reduced transfer factor
  3. Obstructive pattern with increased residual volume
  4. Restrictive pattern with reduced diffusing capacity Correct answer.

Explanation

Asbestosis is interstitial fibrosis, so lung volumes fall and gas transfer is impaired, producing a restrictive pattern with reduced diffusing capacity. Airflow obstruction is more typical of smoking-related COPD than of uncomplicated asbestosis.

Question 24Physical characteristics of asbestos and health effects

What does the term frustrated phagocytosis describe in the pathogenesis of asbestos-related lung disease?

  1. Conversion of fibers into nonpathogenic ferruginous bodies
  2. Mucociliary removal of fibers before alveolar deposition
  3. Complete digestion of long fibers inside macrophage phagolysosomes
  4. Incomplete engulfment of a long fiber with oxidant release Correct answer.

Explanation

Macrophages attempt to engulf fibers, but fibers longer than the cell cannot be completely internalized. The macrophage releases reactive oxygen species and proteases, driving persistent inflammation and fibrosis.

Question 25Physical characteristics of asbestos and health effects

Which deposition mechanism predominates when very small asbestos fibrils, less than about 0.1 micrometer in diameter, reach the alveolar region?

  1. Gravitational sedimentation
  2. Electrostatic precipitation
  3. Brownian diffusion Correct answer.
  4. Inertial impaction

Explanation

Particles below about 0.1 micrometer move by random molecular collisions, so Brownian diffusion dominates in alveoli. Inertial impaction affects larger fibers at airway bifurcations, and sedimentation matters for intermediate sizes.

Question 26Physical characteristics of asbestos and health effects

Which asbestos-related condition is most clearly associated with a high cumulative inhaled fiber dose rather than with low-level exposure?

  1. Benign asbestos pleural effusion
  2. Asbestosis Correct answer.
  3. Malignant mesothelioma
  4. Pleural plaque

Explanation

Asbestosis is a pneumoconiosis that requires a substantial cumulative fiber burden, so it shows the clearest dose-response with high exposure. Mesothelioma can arise after relatively low exposure and has a long latency.

Question 27Physical characteristics of asbestos and health effects

A worker with remote asbestos exposure develops a unilateral exudative pleural effusion without evidence of malignancy. Which asbestos-related diagnosis is most likely?

  1. Asbestosis
  2. Mesothelioma
  3. Bronchogenic carcinoma
  4. Benign asbestos pleural effusion Correct answer.

Explanation

Benign asbestos pleural effusion is an exudative effusion that can appear years after exposure and may resolve or recur without malignancy. Mesothelioma is a malignant diagnosis, and asbestosis is parenchymal fibrosis rather than a pleural effusion.

Question 28Physical characteristics of asbestos and health effects

Which property of amphibole asbestos fibers most directly promotes oxidative DNA injury in lung cells?

  1. Their low iron content and rapid dissolution
  2. Their solubility in acidic phagolysosomes
  3. Their curved, scroll-like crystal habit
  4. Surface iron that catalyzes hydroxyl radical formation Correct answer.

Explanation

Iron associated with amphibole surfaces can participate in Fenton chemistry, generating hydroxyl radicals that damage DNA. This oxidative mechanism complements inflammation and is favored by fibers that persist in tissue.

Question 29Physical characteristics of asbestos and health effects

Vermiculite from the Libby, Montana deposit caused unusually high rates of asbestos-related disease because it was contaminated with which mineral?

  1. Erionite
  2. Chrysotile asbestos
  3. Tremolite asbestos Correct answer.
  4. Kaolinite

Explanation

The Libby vermiculite deposit contained tremolite and related amphibole fibers, and exposure caused high rates of mesothelioma and lung disease in workers and residents. Erionite is a different fibrous zeolite linked to disease in Turkey.

Question 30Physical characteristics of asbestos and health effects

What does biopersistence mean when applied to asbestos fibers in the lung?

  1. The ability of fibers to be rapidly dissolved by alveolar fluid
  2. The retention of fibers because clearance and dissolution are slow Correct answer.
  3. The tendency of fibers to remain outside the body after deposition
  4. The conversion of fibers into spherical dust particles

Explanation

Biopersistence reflects how long fibers remain in the lung because mucociliary clearance, macrophage removal, and chemical dissolution are slow. Long, durable fibers therefore accumulate and deliver a prolonged tissue dose.

Question 31Regulatory framework: NESHAP, OSHA asbestos standards, AHERA/MAP, and Maryland asbestos regulations

Under 40 CFR Part 61, Subpart M, a renovation of a commercial building requires NESHAP notification when the amount of regulated asbestos-containing material (RACM) to be stripped or removed is at least which threshold?

  1. 160 linear feet on pipes
  2. 35 square feet on other facility components
  3. 260 linear feet on pipes Correct answer.
  4. 100 cubic feet off facility components

Explanation

Under 40 CFR Part 61, Subpart M, notification is triggered by 260 linear feet on pipes, 160 square feet on other facility components, or 35 cubic feet off facility components when length or area cannot be measured. These thresholds apply before renovation or demolition begins, and the notice goes to the delegated agency.

Question 32Regulatory framework: NESHAP, OSHA asbestos standards, AHERA/MAP, and Maryland asbestos regulations

What is the OSHA permissible exposure limit (PEL) for asbestos fibers in construction work under 29 CFR 1926.1101?

  1. 0.1 f/cc as an 8-hour time-weighted average Correct answer.
  2. 0.5 f/cc as an 8-hour time-weighted average
  3. 1.0 f/cc as an 8-hour time-weighted average
  4. 0.2 f/cc as an 8-hour time-weighted average

Explanation

The construction asbestos standard sets a permissible exposure limit of 0.1 fiber per cubic centimeter as an 8-hour time-weighted average. A separate excursion limit of 1.0 f/cc over 30 minutes also applies and is not the 8-hour PEL.

Question 33Regulatory framework: NESHAP, OSHA asbestos standards, AHERA/MAP, and Maryland asbestos regulations

Under AHERA, which entity is responsible for ensuring that an asbestos management plan is prepared for each school building it owns or leases?

  1. The accredited inspector
  2. The EPA regional office
  3. The local education agency Correct answer.
  4. The abatement contractor

Explanation

AHERA places the management plan duty on the local education agency that owns or leases the school building. The LEA must ensure inspections, plan preparation, and periodic updates are completed using accredited personnel.

Question 34Regulatory framework: NESHAP, OSHA asbestos standards, AHERA/MAP, and Maryland asbestos regulations

A Maryland contractor is hired to demolish a commercial warehouse that was surveyed and found to contain no asbestos. What notification is required under NESHAP?

  1. Notification only if the building exceeds 10,000 square feet
  2. Notification at least 3 working days before demolition
  3. Notification at least 10 working days before demolition Correct answer.
  4. No notification, because no RACM is present

Explanation

NESHAP requires notice for demolition of a facility even when no asbestos is present, and the notice must be postmarked or delivered at least 10 working days before demolition. The rule prevents unexpected fiber release when demolition disturbs unknown or hidden material.

Question 35Regulatory framework: NESHAP, OSHA asbestos standards, AHERA/MAP, and Maryland asbestos regulations

A crew plans to remove vinyl floor tile classified as category I non-friable ACM by sanding the adhesive and tile. How does NESHAP classify this material?

  1. It becomes RACM only above 160 square feet
  2. It remains category I non-friable and unregulated
  3. It becomes RACM because it will be abraded Correct answer.
  4. It becomes category II non-friable ACM

Explanation

RACM includes category I non-friable ACM that will be or has been sanded, ground, cut, or abraded. Sanding the tile and adhesive changes the material's regulatory status even though it started as category I non-friable.

Question 36Regulatory framework: NESHAP, OSHA asbestos standards, AHERA/MAP, and Maryland asbestos regulations

Under OSHA's asbestos standard for construction, removal of which material is classified as Class I asbestos work?

  1. Boiler lagging and thermal system insulation Correct answer.
  2. Gaskets removed from mechanical flanges
  3. Asbestos-cement transite siding on the exterior
  4. Vinyl floor tile and the associated mastic

Explanation

Class I work is the removal of thermal system insulation and surfacing ACM or PACM. Boiler lagging is TSI, so its removal is Class I; floor tile, transite siding, and gaskets are Class II materials.

Question 37Regulatory framework: NESHAP, OSHA asbestos standards, AHERA/MAP, and Maryland asbestos regulations

In Maryland, which party is authorized to perform asbestos abatement for compensation?

  1. A building owner's maintenance staff with Class IV training
  2. An AHERA-accredited inspector working without a contractor
  3. Any contractor whose employees have OSHA training
  4. An MDE-licensed contractor with accredited staff Correct answer.

Explanation

Maryland requires asbestos abatement contractors to hold an MDE license and to use accredited workers and supervisors. OSHA training cards alone do not authorize abatement for compensation in the state.

Question 38Regulatory framework: NESHAP, OSHA asbestos standards, AHERA/MAP, and Maryland asbestos regulations

AHERA requires a local education agency to conduct a periodic reinspection of asbestos-containing building materials in each school at what maximum interval?

  1. Every 3 years Correct answer.
  2. Every 6 months
  3. Every 5 years
  4. Every 12 months

Explanation

AHERA requires periodic reinspection at least once every 3 years and semiannual surveillance. The 6-month surveillance is a separate, more frequent check and is not the reinspection interval.

Question 39Regulatory framework: NESHAP, OSHA asbestos standards, AHERA/MAP, and Maryland asbestos regulations

An employer has a negative exposure assessment (NEA) for removing 2-foot by 2-foot ceiling tiles using a specified wet method. A worker is assigned to remove the same tile in a different building, but the material crumbles dry and visible dust is generated. What is the correct OSHA compliance action?

  1. Continue but increase daily sampling until the project ends
  2. Stop work and re-evaluate because the NEA no longer applies Correct answer.
  3. Rely on the NEA until the 30-minute excursion limit is exceeded
  4. Continue because the NEA remains valid for the same tile type

Explanation

A negative exposure assessment applies only to the material, method, and conditions it covers. When the material crumbles dry and visible dust appears, the original NEA is no longer valid, so the employer must stop, reassess exposure, and use appropriate controls or respirators.

Question 40Regulatory framework: NESHAP, OSHA asbestos standards, AHERA/MAP, and Maryland asbestos regulations

A contractor removes RACM from a Maryland commercial building. Which handling and disposal practice satisfies NESHAP?

  1. Keep it wet, containerize it leak-tight with labels, and use an approved landfill Correct answer.
  2. Double-bag it in standard trash bags and send it to a municipal waste incinerator
  3. Store it dry in an unlocked roll-off container until the end of the project
  4. Mix it with demolition debris to control dust and dispose of it as construction debris

Explanation

NESHAP requires RACM to be kept adequately wet, sealed in leak-tight containers, labeled, and transported to a landfill permitted to accept asbestos waste. Dry storage or mixing with general debris can cause visible emissions and violates the handling requirements.

Question 41Regulatory framework: NESHAP, OSHA asbestos standards, AHERA/MAP, and Maryland asbestos regulations

A Maryland contractor plans to renovate a commercial building that contains 300 linear feet of asbestos pipe insulation. Under 40 CFR Part 61, Subpart M, when must the contractor submit the written renovation notification to the delegated state agency?

  1. At least 10 working days before the renovation begins Correct answer.
  2. At least 24 hours before the renovation begins
  3. At least 30 calendar days before the renovation begins
  4. At least 3 calendar days before the renovation begins

Explanation

NESHAP requires the owner or operator to submit a written renovation notification at least 10 working days before the project start date. Because 300 linear feet exceeds the 260-linear-foot threshold for pipe RACM, the project is a regulated renovation. The notification must go to the delegated state or local agency, which in Maryland is MDE.

Question 42Regulatory framework: NESHAP, OSHA asbestos standards, AHERA/MAP, and Maryland asbestos regulations

Under AHERA, a building material is classified as asbestos-containing building material (ACBM) when its asbestos content is more than which percentage?

  1. 1 percent Correct answer.
  2. 10 percent
  3. 5 percent
  4. 0.1 percent

Explanation

AHERA defines ACBM as material containing more than 1 percent asbestos by weight. Materials at or below 1 percent are not ACBM under AHERA, although other rules or contract specifications may be stricter. This 1 percent threshold is also used in OSHA and NESHAP definitions.

Question 43Regulatory framework: NESHAP, OSHA asbestos standards, AHERA/MAP, and Maryland asbestos regulations

Under AHERA, how often must a local education agency conduct periodic surveillance of asbestos-containing building materials in its school buildings?

  1. Every 5 years
  2. Every 3 years Correct answer.
  3. Every 12 months
  4. Every 6 months

Explanation

AHERA requires periodic surveillance at least once every 6 months after the management plan is implemented. This surveillance is separate from the reinspection, which is required every 3 years. The purpose is to check for changes in condition of ACBM.

Question 44Regulatory framework: NESHAP, OSHA asbestos standards, AHERA/MAP, and Maryland asbestos regulations

Under 29 CFR 1926.1101, which task is classified as Class II asbestos work?

  1. Removal of sprayed-on fireproofing from structural steel
  2. Removal of asbestos-containing floor tile and mastic using hand tools Correct answer.
  3. Removal of a small section of asbestos pipe insulation to reach a valve
  4. Routine cleaning of asbestos debris in a mechanical room

Explanation

Class II work is removal of ACM that is not thermal system insulation or surfacing material, such as floor tile, mastic, siding, and roofing. Removing sprayed fireproofing is Class I surfacing work, and small pipe-insulation removal is Class III. Routine debris cleaning is Class IV.

Question 45Regulatory framework: NESHAP, OSHA asbestos standards, AHERA/MAP, and Maryland asbestos regulations

Under OSHA's asbestos standard for construction, an employer must provide medical surveillance to an employee assigned to Class I, II, or III asbestos work for at least how many days per year?

  1. 10 days
  2. 30 days Correct answer.
  3. 60 days
  4. 90 days

Explanation

29 CFR 1926.1101(m) requires medical examinations for employees engaged in Class I, II, or III work for 30 or more days per year. Medical surveillance is also triggered by exposure at or above the PEL or excursion limit, or by respirator use. The 30-day trigger is based on days of work, not consecutive days.

Question 46Regulatory framework: NESHAP, OSHA asbestos standards, AHERA/MAP, and Maryland asbestos regulations

Before beginning an asbestos abatement project in Maryland, a licensed contractor must provide written notification to which agency?

  1. The local fire department
  2. Maryland Department of Labor
  3. Maryland Department of the Environment Correct answer.
  4. Maryland Department of Health

Explanation

Maryland's asbestos abatement regulations are administered by the Maryland Department of the Environment (MDE). The contractor must submit written notification to MDE at least 10 working days before the project start date. Local fire departments are not the asbestos notification authority.

Question 47Regulatory framework: NESHAP, OSHA asbestos standards, AHERA/MAP, and Maryland asbestos regulations

Under NESHAP, which material is regulated asbestos-containing material (RACM) even though it is initially non-friable?

  1. Non-friable ACM that will remain in place during renovation
  2. Non-friable ACM that will be crumbled, pulverized, or reduced to powder during removal Correct answer.
  3. Non-friable ACM that is wetted and removed intact
  4. Non-friable ACM that is covered by a resilient floor covering

Explanation

RACM includes friable ACM and non-friable ACM that will be or has been crumbled, pulverized, or reduced to powder by the work practices or by mechanical forces. Non-friable material that remains intact and in place is generally not RACM. Wetting and intact removal help keep non-friable material from becoming RACM.

Question 48Regulatory framework: NESHAP, OSHA asbestos standards, AHERA/MAP, and Maryland asbestos regulations

Under OSHA's asbestos standard, which activity is classified as Class IV asbestos work?

  1. Removal of a glove bag from asbestos pipe insulation
  2. Removal of asbestos-containing roofing shingles
  3. Enclosure of asbestos-containing surfacing material
  4. Maintenance and custodial activities that contact ACM but do not disturb it Correct answer.

Explanation

Class IV work covers maintenance and custodial activities where employees contact ACM or presumed ACM but do not disturb it, including cleanup of debris and dust. Roofing removal is Class II, enclosure of surfacing is Class I, and glove-bag work on pipe insulation is Class III. Class IV workers still require awareness training and safe work practices.

Question 49Regulatory framework: NESHAP, OSHA asbestos standards, AHERA/MAP, and Maryland asbestos regulations

Under AHERA, how many hours of asbestos awareness training must a local education agency provide to maintenance and custodial employees who may encounter ACBM?

  1. 4 hours
  2. 8 hours
  3. 2 hours Correct answer.
  4. 16 hours

Explanation

AHERA requires at least 2 hours of asbestos awareness training for maintenance and custodial staff whose duties may bring them into contact with ACBM. Employees who will disturb ACBM need additional, more extensive training. The 2-hour course covers recognition, health effects, and avoidance of disturbance.

Question 50Regulatory framework: NESHAP, OSHA asbestos standards, AHERA/MAP, and Maryland asbestos regulations

In Maryland, which individual may supervise an asbestos abatement project for a licensed abatement contractor?

  1. Any OSHA 30-hour trained construction supervisor
  2. A Maryland-accredited asbestos supervisor employed by a licensed abatement contractor Correct answer.
  3. A certified industrial hygienist retained by the building owner
  4. A licensed general contractor with five years of construction experience

Explanation

Maryland requires asbestos abatement supervisors to be accredited through the Maryland Asbestos Program and to work for a licensed abatement contractor. General construction experience, OSHA 30-hour training, or industrial hygiene certification does not substitute for Maryland asbestos supervisor accreditation. The supervisor must be on site and responsible for compliance with work practice standards.