WHMIS Practice Test 2026

WHMIS is Canada's hazard communication system for hazardous products used at work. There is no single national WHMIS exam: your employer or training provider checks what you learned in its own way. This practice covers pictograms, hazard classes, labels, safety data sheets, duties and safe storage.

  • Sécurité au travail
  • Canada
  • 100 questions
  • Vérifié le 10 octobre 2026

En bref

Pour réussir : No national exam. Any quiz and pass mark are set by your employer or training provider. Organisé par : Provincial, territorial and federal occupational health and safety regulators (employer and training rules); Health Canada (supplier label and SDS rules). Entraînez-vous ici gratuitement avec 100 questions, chacune avec la réponse et une explication. Vérifié à partir des sources officielles le 10 octobre 2026.

À lire avant de vous entraînerCommencez par le guide « WHMIS Study Guide » : des notes en langage clair, des schémas et les chiffres à retenir.
  1. Question 1 sur 25

    What does WHMIS stand for?
    Voir la réponse

    Réponse: B. Workplace Hazardous Materials Information System

    WHMIS is the Workplace Hazardous Materials Information System, Canada's national hazard communication standard.

  2. Question 2 sur 25

    What are the three main ways WHMIS gives workers information about hazardous products?
    Voir la réponse

    Réponse: B. Labels, safety data sheets (SDSs) and worker education and training

    WHMIS works through cautionary labels on containers, safety data sheets, and worker education and training programs.

  3. Question 3 sur 25

    WHMIS 2015 is based on which international system?
    Voir la réponse

    Réponse: A. The Globally Harmonized System of Classification and Labelling of Chemicals (GHS)

    WHMIS adopted the GHS so that hazard classes, pictograms and safety data sheets follow one international approach.

  4. Question 4 sur 25

    Which federal law and regulations set the WHMIS rules for suppliers of hazardous products?
    Voir la réponse

    Réponse: A. The Hazardous Products Act and the Hazardous Products Regulations

    Health Canada administers the Hazardous Products Act and its regulations, which set labelling and SDS rules for suppliers.

  5. Question 5 sur 25

    Who sets the WHMIS rules that employers in a province must follow?
    Voir la réponse

    Réponse: A. The OHS law of that province or territory

    Each federal, provincial and territorial OHS agency sets WHMIS requirements for employers in its own jurisdiction.

  6. Question 6 sur 25

    Under WHMIS, who is a "supplier"?
    Voir la réponse

    Réponse: D. A person who sells or imports a hazardous product in the course of business

    Suppliers are people or companies that sell or import hazardous products as part of their business.

  7. Question 7 sur 25

    Amendments to the Hazardous Products Regulations came into force on December 15, 2022. When did the transition period end?
    Voir la réponse

    Réponse: D. December 14, 2025

    Health Canada set a 3-year transition period that ended on December 14, 2025.

  8. Question 8 sur 25

    WHMIS 2015 sorts hazards into which two groups?
    Voir la réponse

    Réponse: B. Physical hazards and health hazards

    The physical hazards group is based on properties such as flammability; the health hazards group is based on effects on the body.

  9. Question 9 sur 25

    The GHS has a third hazard group that WHMIS did not adopt. Which group is it?
    Voir la réponse

    Réponse: D. Environmental hazards

    WHMIS uses only the physical and health hazard groups. It did not adopt the GHS environmental hazard group.

  10. Question 10 sur 25

    Within most WHMIS hazard classes, which category shows the most severe hazard?
    Voir la réponse

    Réponse: A. Category 1

    Category 1 is the most severe level within its class. Category 2 is more hazardous than Category 3, with a few exceptions.

  11. Question 11 sur 25

    For gases under pressure, what do the categories (compressed, liquefied, refrigerated liquefied, dissolved) describe?
    Voir la réponse

    Réponse: C. The physical state of the gas in the container

    For gases under pressure, the categories describe the physical state of the gas, not the degree of hazard.

  12. Question 12 sur 25

    Which of these is a physical hazard class?
    Voir la réponse

    Réponse: C. Flammable liquids

    Flammable liquids are in the physical hazards group. The other three are health hazard classes.

  13. Question 13 sur 25

    Which of these is a health hazard class?
    Voir la réponse

    Réponse: A. Carcinogenicity

    Carcinogenicity (the ability to cause cancer) is a health hazard class. The others are physical hazard classes.

  14. Question 14 sur 25

    Which physical hazard class was added by the 2022 amendments to the Hazardous Products Regulations?
    Voir la réponse

    Réponse: B. Chemicals under pressure

    The amendments added the class "chemicals under pressure". Combustible dusts and simple asphyxiants were already WHMIS 2015 classes.

  15. Question 15 sur 25

    After the 2022 amendments, how are pyrophoric gases classified?
    Voir la réponse

    Réponse: D. As flammable gases, Category 1A

    The pyrophoric gases class was repealed. These gases now fall under flammable gases, Category 1A.

  16. Question 16 sur 25

    What is a simple asphyxiant?
    Voir la réponse

    Réponse: A. A gas that can push oxygen out of the air and cause rapid suffocation

    Simple asphyxiants are gases that displace oxygen in the air. In a small or enclosed space this can quickly cause suffocation.

  17. Question 17 sur 25

    The amended rules renamed "flammable aerosols" to "aerosols". What does the new Aerosols Category 3 cover?
    Voir la réponse

    Réponse: B. Aerosol products that are not flammable

    The class was renamed Aerosols and a new Category 3 was added for non-flammable aerosol products.

  18. Question 18 sur 25

    What does this WHMIS pictogram warn you about?
    Voir la réponse

    Réponse: C. Products that can catch fire or burn easily

    The flame pictogram is used for flammable gases, aerosols, liquids and solids, and other products that can ignite.

  19. Question 19 sur 25

    What does this WHMIS pictogram warn you about?
    Voir la réponse

    Réponse: A. Oxidizing products that can cause or worsen a fire

    The flame over circle pictogram is used for oxidizing gases, liquids and solids. They give off oxygen and can make a fire more intense.

  20. Question 20 sur 25

    In WHMIS, which products carry this pictogram?
    Voir la réponse

    Réponse: B. Self-reactive substances and organic peroxides (Types A and B)

    Under WHMIS, the exploding bomb pictogram is used for self-reactive substances and organic peroxides of Types A and B.

  21. Question 21 sur 25

    What does this WHMIS pictogram show?
    Voir la réponse

    Réponse: B. Gases or chemicals stored under pressure

    The gas cylinder pictogram is used for gases under pressure and for chemicals under pressure.

  22. Question 22 sur 25

    What does this WHMIS pictogram warn you about?
    Voir la réponse

    Réponse: C. Products that can burn skin, damage eyes or eat away metal

    The corrosion pictogram covers skin corrosion, serious eye damage and products that are corrosive to metals.

  23. Question 23 sur 25

    What does this WHMIS pictogram warn you about?
    Voir la réponse

    Réponse: C. Products that can cause death or serious poisoning, even in small amounts

    The skull and crossbones is used for acute toxicity Categories 1 to 3: products that are fatal or toxic if swallowed, in contact with skin or inhaled.

  24. Question 24 sur 25

    Which hazards does this WHMIS pictogram usually show?
    Voir la réponse

    Réponse: A. Less severe hazards, such as skin or eye irritation

    The exclamation mark covers hazards such as skin irritation, eye irritation, skin sensitization and acute toxicity Category 4.

  25. Question 25 sur 25

    What does this WHMIS pictogram warn you about?
    Voir la réponse

    Réponse: C. Serious health effects, such as cancer or organ damage

    The health hazard pictogram covers carcinogens, mutagens, reproductive toxicants, respiratory sensitizers, target organ toxicity and aspiration hazards.

À savoir avant l’examen

  • Employers must educate and train workers on the hazards and safe use of hazardous products. Workers must take part in that training.
  • Each province or territory sets its own WHMIS education and training rules. Federally regulated workplaces follow federal rules.
  • Training is site-specific. If you change employers, your new workplace must train you on its own products and procedures.
  • Supplier labels and safety data sheets (SDSs) must be in both English and French.
  • An SDS has 16 sections. Suppliers must update an SDS within 90 days, and a label within 180 days, of learning significant new data.
  • WHMIS uses two signal words: "Danger" for more severe hazards and "Warning" for less severe hazards.
  • Amendments to the Hazardous Products Regulations came into force on December 15, 2022. The transition period ended on December 14, 2025.

Questions fréquentes

Is there an official national WHMIS exam?

No. Provincial, territorial and federal OHS laws require WHMIS education and training, but there is no single national exam. Your employer or training provider may check your knowledge with a written quiz or a practical demonstration.

Does WHMIS training expire?

There is no national expiry date. Employers should review their WHMIS program at least once a year and give refresher training when products, hazards or work conditions change. Check your province or territory for any extra rules.

What are the WHMIS pictograms?

WHMIS uses eight GHS pictograms with a red diamond border (flame, flame over circle, gas cylinder, corrosion, exploding bomb, skull and crossbones, health hazard, exclamation mark) plus the biohazardous infectious materials pictogram, which has a black circle border.

When is a workplace label needed?

When a product is poured into another container, when a hazardous product is made and used in the workplace, or when the supplier label is lost or cannot be read.

Do I need new WHMIS training if I change jobs?

Yes, at least the site-specific part. General WHMIS education may carry over, but each workplace must train you on its own products, procedures and emergencies.

Sources

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