Practice Test Geeks(WHMIS) Workplace Hazardous Materials Information System Practice Test
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Hazard Classes and Pictograms Flashcards

7 cards from real WHMIS practice questions. Tap to flip, then mark Knew It or Still Learning — missed cards come back until you master them.

Read the first 7 Hazard Classes and Pictograms flashcards as text

  1. How many pictograms are defined in the WHMIS 2015 hazard communication system?

    Answer: 9

    WHMIS 2015 defines 9 pictograms: exploding bomb, flame, flame over circle, gas cylinder, corrosion, skull and crossbones, exclamation mark, health hazard, and biohazard.

  2. A gas classified as both flammable and acutely toxic (Category 2) under WHMIS would display:

    Answer: Both the flame pictogram and the skull and crossbones pictogram

    All applicable hazard pictograms must appear on the label; both flammable and toxic hazards must be communicated separately.

  3. Which WHMIS pictogram is NOT legally required to appear on a label even when the substance qualifies for that hazard?

    Answer: Environmental (aquatic toxicity)

    The environmental pictogram for aquatic toxicity is voluntary under WHMIS 2015 and may be omitted even when a substance meets the classification criteria.

  4. A chemical that causes occupational asthma by sensitizing the respiratory tract would display which WHMIS pictogram?

    Answer: Health hazard

    Respiratory sensitization is a serious chronic health hazard covered by the health hazard pictogram, not the less-severe exclamation mark.

  5. Gasoline stored in an industrial facility would primarily be classified under which WHMIS hazard class?

    Answer: Class 3 – Flammable Liquids

    Gasoline is a flammable liquid (flash point below 60°C), placing it in WHMIS Class 3 – Flammable Liquids.

  6. Under WHMIS 2015, which scenario correctly triggers the corrosion pictogram related to metals — not skin?

    Answer: A substance that destroys or irreversibly damages steel or aluminum at a defined test rate

    Corrosive to metals is a separate hazard class from skin corrosion; it is triggered when a substance corrodes steel or aluminum at more than 6.25 mm/year.

  7. Which of the following best describes the full scope of the WHMIS 2015 'health hazard' pictogram?

    Answer: It covers carcinogenicity, mutagenicity, reproductive toxicity, respiratory sensitization, STOT, and aspiration hazard

    The health hazard pictogram is a broad category covering multiple serious chronic and systemic health effects that the exclamation mark does not capture.