Asbestos Study Test questions fully solved & updated 2024

Name four characteristics of asbestos Naturally occurring, fibrous, hydrated, mineral and silicates What type of asbestos is the fibrous serpentine chrysotile (white asbestos) Name the 5 amphiboles Amosite Tremolite Actinolite Crocidolite Anthopyllite Name physical properties of asbestos fire resistant spinnability tensile strength strong and durable resists fungus growth corrosion heat acids vermin What were some of the uses of asbestos brake lining in cars and air craft pipes for water and sewer systems What is the most common asbestos Chrysotile (white asbestos) 3Mg O - Si O2 - 2H2O What is the second most common asbestos Amosite (brown asbestos) Fe Mg SiO3 What is the third most common asbestos but rare Crocidolite (blue asbestos) Na Fe [SiO3] 2H3O What to amphibole fibers used commercially are extremely hazardous Amosite and crocidolite What 6 diseases are associated with asbestos Lung Cancer, Stomach Cancer, Asbestosis, Mesothelioma and Colon-Rectal Cancer What does asbestos cause in the lungs Bronchogenic carcinoma What is asbestosis A pneumoconiosis a diffuse, interstitial, non-malignant scarring of the lungs often goes un-noticed occurs from high exposures What is Dyspnea? Undue shortness of breath, asbestos-related What is Rales? Crackling sounds heard when heart is listened to via stethoscope Related to asbestos What is finger clubbing related to? Asbestos How are we exposed to asbestos Air, water, soil, food and occupational What are some uses of asbestos Shingles, thermal system insulation, brake/clutch lining, water pipes siding, cement filler, wire insulation, spray-on acoustical material and vinyl flooring What to do with asbestos Leave it alone. repair, encapsulate, enclose and remove When is asbestos a hazard When it is "friable" When it will be disturbed When it is located in areas that may be disturbed by children Prior to demolition/renovation projects Two types of asbestos containing materials Friable Non-Friable Friable Can be crumbled, pulverized or reduced to powder by hand pressure. Non-friable Cannot be crumbled, pulverized or reduce to powder by hand pressure. Asbestos is heat resistant from what degree Celsius 500 - 1500 degrees Celsius Specific work activities that disturb the make-up of asbestos materials: (a) Punching (b) Grinding (c) Sanding (d) Machining What does Normal deterioration of Asbestos mean? Asbestos fibers are released into the air. The loosely bound fibers are pulverized or easily crumbled creating microscopic contaminants that have been identified as a health hazard What is Malignant Mesothelioma Tumor which lines the chest and abdomina cavity (also) Suspected to also cause cancer of GI tract Asbestos Exposure Limits (1) Permissible Exposure Limit (PEL). (a) 0.1 fibers per cubic centimeter (f/cc) of air, calculated as an 8-hour time-weighted average (TWA) exposure Describe the fibers found in the serpentine type asbestos group Fibers in the serpentine group have a sheet or layered structure and curly fibers Describe "chrysotile" fibers and how commonly they were used Chrysotile fibers are long, wavy and flexible. It is classfied under serpentine. Approx. 95% of all asbestos used was chrysotile. It is still used in 90% of the asbestos application. Describe amphibole fibers Amphibile fibers are straight and have a chainlike structure. What specific properties make asbestos so useful? they resist: burning even at high temps. breaking corrosion biological and are very flexible What main factor will determine ASM will be handled? Its friability What applications did friabable sprayed products have? Acoustic or thermal insulation on structural steel, hotels, and resturants. It was widely used until the 1970s What are some early and advanced symptoms of asbestosis? Early sypmtoms include: shortness of breathe after excerise dry cough generalized feeling of illness Advanced symptoms include more sever shortness of breathe coughing blood recurrent respiratory infections How does lung cancer develop with asbestos fibers? Asbestos fibers trapped in the lungs can trigger cancerous growth in lung tissue which will produce a tumour limiting lung function When does OHSA law require a Risk Assessment to be done? Risk assessments must be done prior to any demolition, alteration, or repair of any machinery, equipment, or structures where asbestos-containing material may be disturbed What is the purpose of an OHSA Law required risk assessment? To classify any work activity related to asbestos as a low, moderate, or high risk activity. What is involved in the first stage of a work activity related to asbestos? The first stage of an asbestos risk assessment involves evaluating parameters that are indicative of the likelihood of worker exposure. The following parameters most commonly looked at include: Main parameters accessibility condition of asbestos containing material firability presence in return air plenum precentage of asbestos content Other parameters extend of water damage exposed friable surface area activity and movement What does phase two of risk assessment involve? Eachof the parameters in phase one will be given a score to indicate the potential for exposure. The scores will be added to derive the overall risk factor which will be used to prioritize and control abatement. How often should asbesto contaminent and decontaminent facilty rooms be checked? How would airflow be checked? They should be checked daily for gaps or breaks in contaminent. air flow areas also need to be checked to ensure clean and clear of any contaminent. visual checks are often done along with smoke tubes and pressure differentials. How many air samples are required in a site that has asbestos? Air sampling must be done daily to determine effectiveness of controls. What are the four options for asbestos abatment? Leave it alone, encapsulate it ,enclose it and remove it. The first three require a "managment plan" What are some things to note about "Encapsulation?" It's a temporary measure the material is coated with a bonding agent/sealent must be done where no further contact will occur must be capable of supporting the extra weight fire rating must be considered advantages/disadvantages similar to leave it alone How does enclosure protect workers? Give an example of poorly used enclosure. A barrier or enclosure is errected to prevent access. Acceptable materials include drywall, plywood, brick, sheet metal, etc.. A suspended ceiling is too easily accessed so would nt be considered an acceptable enclosure