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Posttest

1. Which of the following products contain tetrachloroethylene?
   1. shoe polish
   2. laundry soaps
   3. spot removers
   4. insect repellents.
2. People can be exposed to tetrachloroethylene from
   1. environmental sources
   2. consumer products
   3. occupational sources
   4. All of the above.
3. The exposure pathway to tetrachloroethylene that most commonly leads to illness is through
   1. ingestion
   2. dermal contact
   3. inhalation
   4. All are equally important.
4. All of the following persons have an increased likelihood of tetrachloroethylene exposure except?
   1. machinists and metal degreasers
   2. dry-cleaning workers
   3. breast-fed infants of exposed mothers
   4. tree sprayers.
5. NIOSH considers tetrachloroethylene a potential carcinogen and recommends exposure in the workplace be reduced to
   1. 25 ppm
   2. 100 ppm
   3. 50 ppm
   4. the lowest possible level.
6. Which of the following statement(s) about tetrachloroethylene is (are) true?
   1. it is well absorbed from the lungs
   2. an ingested dose can result in gangrene
   3. most of an absorbed dose is metabolized in the liver
   4. most of an inhaled dose is eliminated in urine.
7. Renal failure after acute tetrachloroethylene exposure is probably
   1. caused by an excess of hydrogen chloride resulting from the solvent's metabolism
   2. caused by a rise in urobilinogen
   3. a result of vascular collapse after CNS depression
   4. associated with generation of reactive metabolites selectively in the kidney.
8. CNS effects due to tetrachloroethylene include all of the following except
   1. can occur in the absence of liver toxicity
   2. are enhanced in a person exposed to tetrachloroethylene while exercising
   3. are due to trichloroacetic acid, a major metabolite of tetrachloroethylene
   4. can result in a positive Romberg test at high exposure levels.
9. Which one of the following is CNS effect of chronic inhalation exposure to tetrachloroethylene?
   1. paranoid psychosis
   2. dysesthesia
   3. disorientation
   4. tactile hallucinations.
10. Patients with acute tetrachloroethylene poisoning can have all of the following except
    1. slurred speech
    2. jaundice
    3. memory deficit
    4. upper respiratory irritation.
11. To measure tetrachloroethylene in blood or expired air after exposure, samples should be collected within
    1. 1 hour
    2. 6 hours
    3. 16 hours
    4. 24 hours.
12. Treatment(s) for acute inhalation of tetrachloroethylene include(s)
    1. oxygen
    2. activated charcoal
    3. emesis
    4. ethanol administered intravenously

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