COHN-S STUDY GUIDE 2026 QUESTIONS AND ANSWERS
GRADED A+
✔✔remove from expsosure and chelation - ✔✔treatment for lead exposure
✔✔pesticides, dental amalgam, manufacturing - ✔✔mercury found in
✔✔inhalation, ingestion - ✔✔mercury route of exposure
✔✔tremor, gingivitis, dermatitis - ✔✔mercury acute exposure
✔✔personality changes, renal dysfunction, CNS in unborn children - ✔✔mercury
chronic exposure
✔✔Nervous, GI, GU - ✔✔mercury systems affected
✔✔remove and chelation - ✔✔mercury treatment
✔✔mining, alloy production, pesticides, some gasoline - ✔✔manganese found in
✔✔inhalation, ingestion - ✔✔manganese route of exposure
✔✔psychological and neurobehavioral disturbances - ✔✔manganese acute exposure
✔✔tremors, impaired psychomotor dev in children who are exposed in utero -
✔✔manganese chronic exposure
✔✔nervous system - ✔✔manganese systems affected
✔✔pleural effusion, asbestosis and mesothelioma - ✔✔chronic exposure to airborne
asbestos
✔✔30-40 years - ✔✔asbestos latency period
✔✔any fibrosis of the lung tissues caused by dust in the lungs after prolonged
environmental or occupational contact - ✔✔pneumoconiosis
✔✔caused by inhaling silica dust in the lungs and usually occurs after working in
occupations including foundry work, quarrying, ceramics, glass work, and sandblasting -
✔✔silicosis
✔✔TB - ✔✔employees exposed to silica dust should be screened annually for
, ✔✔pneumoconiosis or black lung caused by coal dust - ✔✔workers in coal mining are
increased risk for
✔✔CXRs and PFT - ✔✔coal miners are screened with
✔✔chemicals used to remove paint, tar, gum and grease - ✔✔Solvents
✔✔urine and exhalation - ✔✔solvents are excreted by
✔✔liver - ✔✔solvents are metabolized in
✔✔pneumonitis and death - ✔✔aspiration of solvents can cause
✔✔most common asphyxiant - ✔✔hydrogen cyanide
✔✔50mcg/100g of blood - ✔✔Employee is subject to the medical removal protection
(MRP) section of the standard if the blood lead level is at or above
✔✔A temporary depression of the hearing is called - ✔✔Temporary Threshold Shift
(TTS)
✔✔TCIR - ✔✔Total case incident rate
✔✔TCIR formula - ✔✔Number of cases per year x 200,000 work hours
divided by number of hours worked by the given population
✔✔Benzene (common use) - ✔✔gasoline additive
✔✔carbon disulfide (common use) - ✔✔manufature of rayon and rubber
✔✔ethylene oxide (common use) - ✔✔gas used to sterilize surgical instruments and
other supplies
✔✔formaldehyde (common use) - ✔✔preservative in labs, particle board, paper, rubber,
dye
✔✔n-Hexane (common uses) - ✔✔manufacture of rubber, glues, thinners
✔✔methylene chloride (common use) - ✔✔degreaser, furniture stripper
✔✔Toluene - ✔✔substitute for benzene, used in ink, dyes, paints
✔✔Trichoroethylene (common uses) - ✔✔degreaser
GRADED A+
✔✔remove from expsosure and chelation - ✔✔treatment for lead exposure
✔✔pesticides, dental amalgam, manufacturing - ✔✔mercury found in
✔✔inhalation, ingestion - ✔✔mercury route of exposure
✔✔tremor, gingivitis, dermatitis - ✔✔mercury acute exposure
✔✔personality changes, renal dysfunction, CNS in unborn children - ✔✔mercury
chronic exposure
✔✔Nervous, GI, GU - ✔✔mercury systems affected
✔✔remove and chelation - ✔✔mercury treatment
✔✔mining, alloy production, pesticides, some gasoline - ✔✔manganese found in
✔✔inhalation, ingestion - ✔✔manganese route of exposure
✔✔psychological and neurobehavioral disturbances - ✔✔manganese acute exposure
✔✔tremors, impaired psychomotor dev in children who are exposed in utero -
✔✔manganese chronic exposure
✔✔nervous system - ✔✔manganese systems affected
✔✔pleural effusion, asbestosis and mesothelioma - ✔✔chronic exposure to airborne
asbestos
✔✔30-40 years - ✔✔asbestos latency period
✔✔any fibrosis of the lung tissues caused by dust in the lungs after prolonged
environmental or occupational contact - ✔✔pneumoconiosis
✔✔caused by inhaling silica dust in the lungs and usually occurs after working in
occupations including foundry work, quarrying, ceramics, glass work, and sandblasting -
✔✔silicosis
✔✔TB - ✔✔employees exposed to silica dust should be screened annually for
, ✔✔pneumoconiosis or black lung caused by coal dust - ✔✔workers in coal mining are
increased risk for
✔✔CXRs and PFT - ✔✔coal miners are screened with
✔✔chemicals used to remove paint, tar, gum and grease - ✔✔Solvents
✔✔urine and exhalation - ✔✔solvents are excreted by
✔✔liver - ✔✔solvents are metabolized in
✔✔pneumonitis and death - ✔✔aspiration of solvents can cause
✔✔most common asphyxiant - ✔✔hydrogen cyanide
✔✔50mcg/100g of blood - ✔✔Employee is subject to the medical removal protection
(MRP) section of the standard if the blood lead level is at or above
✔✔A temporary depression of the hearing is called - ✔✔Temporary Threshold Shift
(TTS)
✔✔TCIR - ✔✔Total case incident rate
✔✔TCIR formula - ✔✔Number of cases per year x 200,000 work hours
divided by number of hours worked by the given population
✔✔Benzene (common use) - ✔✔gasoline additive
✔✔carbon disulfide (common use) - ✔✔manufature of rayon and rubber
✔✔ethylene oxide (common use) - ✔✔gas used to sterilize surgical instruments and
other supplies
✔✔formaldehyde (common use) - ✔✔preservative in labs, particle board, paper, rubber,
dye
✔✔n-Hexane (common uses) - ✔✔manufacture of rubber, glues, thinners
✔✔methylene chloride (common use) - ✔✔degreaser, furniture stripper
✔✔Toluene - ✔✔substitute for benzene, used in ink, dyes, paints
✔✔Trichoroethylene (common uses) - ✔✔degreaser
