JHSC Part One: Hazard assessment and exposure limits

All 14 questions in this test

Every question and its answer choices. The correct answers and explanations appear when you take the test above.

1. How is a short-term exposure limit (STEL) defined in Reg. 833?

   1. The average over one full week, measured once every Friday afternoon
   2. The maximum for any 8 hours, up to twice a month, a week apart
   3. The maximum for any 15 minutes, up to four times a shift, an hour apart
   4. The highest level allowed at any instant, never to be exceeded

2. What is the purpose of exposure monitoring?

   1. To record how many hours each worker spends on breaks each working day
   2. To measure workers' exposure to an agent and compare it with limits
   3. To check whether workers arrive at work on time each morning
   4. To film workers so the employer can review their productivity

3. Which organization's threshold limit values (TLVs) are referred to in Part One training?

   1. The Workplace Safety and Insurance Board's annual claims report
   2. The Canadian Standards Association, which sets all Ontario exposure laws
   3. The Ontario Human Rights Commission's code of conduct for employers
   4. The American Conference of Governmental Industrial Hygienists (ACGIH)

4. Over what period is a TWA exposure limit averaged?

   1. A work day or work week
   2. A full calendar year
   3. The worker's career
   4. Any single minute of the shift

5. What does TWA stand for in Ontario's exposure limits?

   1. Total workplace allowance for hazards
   2. Trained worker authority
   3. Toxic waste assessment
   4. Time-weighted average limit

6. Which Ontario regulation sets limits for exposure to biological or chemical agents?

   1. O. Reg. 213/91
   2. Reg. 851
   3. Reg. 833
   4. O. Reg. 632/05

7. Comparing a workplace condition with a legal requirement or recognized standard is part of which step?

   1. Hazard assessment
   2. Incident reporting
   3. Hazard elimination
   4. Member selection

8. Which regulation covers designated substances such as asbestos, lead and silica?

   1. O. Reg. 297/13 (Training)
   2. Reg. 834 (Critical Injury)
   3. O. Reg. 490/09
   4. Reg. 860 (WHMIS)

9. What is a ceiling limit (C)?

   1. The average concentration over one full year of work
   2. The maximum concentration a worker may be exposed to at any time
   3. The level at which a worker can first smell the chemical
   4. The concentration that applies only on night shifts

10. What is the purpose of a hazard assessment?

    1. To determine how serious a hazard is
    2. To count how many hazards the plant has
    3. To decide which worker caused the hazard
    4. To set the price of the safety equipment

11. Why might a designated worker member attend the beginning of workplace air testing?

    1. To make sure valid procedures are used and results are accurate
    2. To choose which areas will be left out of the testing plan
    3. To approve the consultant's bill before any samples are taken
    4. To operate the sampling equipment in place of the consultant

12. Interviews with workers about how a task is done are an example of what?

    1. A performance review
    2. A hiring procedure
    3. A hazard assessment method
    4. A disciplinary hearing for the worker

13. Which is a recognized method of assessing a hazard?

    1. Job hazard analysis
    2. Waiting for an injury
    3. Flipping a coin twice
    4. Asking customers to vote

14. A solvent reading is below the TWA over the shift but a 15-minute spike exceeds the STEL. Is the exposure acceptable?

    1. Yes, if the worker wore a dust mask at the time
    2. Yes, as long as it happened only once a day
    3. No; the STEL must also be respected
    4. Yes; only the TWA applies over a full shift