WHMIS: Hazard groups, classes and categories

All 16 questions in this test

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

1. What happened to the class formerly called "Flammable aerosols" in the 2022 amendments?

   1. It was moved to the health hazards group
   2. It was merged into Gases under pressure
   3. It became Aerosols, with a new Category 3
   4. It was removed from WHMIS completely

2. After the 2022 amendments, where are pyrophoric gases classified?

   1. Under Flammable gases, Category 1A
   2. In their own Pyrophoric gases class
   3. Under Simple asphyxiants
   4. Under Oxidizing gases, Category 1

3. WHMIS sorts hazards into which two main groups?

   1. Liquid hazards and solid hazards
   2. Indoor hazards and outdoor hazards
   3. Physical hazards and health hazards
   4. Short-term hazards and long-term hazards

4. Why is there no Explosives hazard class in WHMIS?

   1. Explosives are covered by other Canadian legislation
   2. Explosives are listed as a health hazard instead
   3. Explosives are banned in all workplaces
   4. Explosives must use a workplace label only

5. For gases under pressure, what do the categories (compressed, liquefied, refrigerated liquefied, dissolved) describe?

   1. How far the gas can travel
   2. How toxic the gas is to breathe
   3. The severity of the hazard, from worst to least
   4. The physical state of the gas as packaged

6. Some hazard classes use "types" instead of numbered categories. How are types identified?

   1. With Roman numerals such as I and II
   2. With colours such as red and yellow
   3. With letters such as A, B and C
   4. With percentages such as 10% and 20%

7. Which reproductive toxicity category has no number assigned to it?

   1. Effects on or via lactation
   2. Effects on the unborn child
   3. Suspected reproductive toxicant
   4. Effects on fertility

8. Within the same hazard class, which category is the most hazardous?

   1. Category 3
   2. Category 1
   3. Category 2
   4. Category 4

9. The GHS includes an environmental hazards group. What is its status in WHMIS?

   1. Not adopted, though suppliers may still show it
   2. Required only for products made and sold in Canada
   3. Required on every WHMIS label
   4. Replaced the health hazards group

10. Flammability, reactivity and corrosivity to metals are examples of what?

    1. Health hazards
    2. Environmental hazards
    3. Biological hazards
    4. Physical hazards

11. Who must classify a hazardous product that an employer produces for use only in its own workplace?

    1. The nearest supplier
    2. Health Canada
    3. The workers who use it
    4. The employer

12. Which physical hazard class was added in the December 2022 amendments?

    1. Gases under pressure
    2. Flammable liquids
    3. Combustible dusts
    4. Chemicals under pressure

13. A product may cause cancer if workers are exposed to it. Which WHMIS hazard group does this fall under?

    1. Reactivity hazards
    2. Environmental hazards
    3. Physical hazards
    4. Health hazards

14. In WHMIS, what is a hazard class?

    1. A training course level that workers must complete each year
    2. A list of approved suppliers
    3. A price range for chemical products
    4. A way of grouping products with similar hazardous properties

15. Two products are in the same hazard class. One is Category 1A and the other is Category 1B. Which is more hazardous?

    1. They are exactly equal
    2. Category 1A
    3. It depends on the container size
    4. Category 1B

16. What does the hazard category of a product tell you?

    1. Which province the product is sold in
    2. Which company made the product
    3. How severe the hazard is within its class
    4. How many litres are in the container