Practice Test Geeks(WHMIS) Workplace Hazardous Materials Information System Practice Test
← All WHMIS Flashcard Decks

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. Which WHMIS 2015 pictogram depicts a cylinder shape and indicates gases stored under pressure?

    Answer: Gas cylinder

    The gas cylinder pictogram applies to compressed, liquefied, dissolved, and refrigerated liquefied gases stored under pressure.

  2. The 'flame over circle' pictogram in WHMIS specifically identifies which type of hazard?

    Answer: Oxidizing substances that can intensify fires

    The flame over circle pictogram indicates oxidizing substances, which can provide oxygen to support and intensify combustion.

  3. Sodium metal, which reacts violently with water to release hydrogen gas, belongs to which WHMIS hazard class?

    Answer: Substances that emit flammable gases on contact with water (Class 4.3)

    Class 4.3 covers substances that react with water to produce flammable gases, such as sodium or potassium metals.

  4. A Dewar flask of liquid nitrogen in a laboratory would most prominently display which WHMIS pictogram?

    Answer: Gas cylinder

    Liquid nitrogen is a refrigerated liquefied gas under pressure, so it carries the gas cylinder pictogram.

  5. Industrial-strength hydrogen peroxide at concentrations above 60% is most likely classified under which WHMIS hazard category?

    Answer: Oxidizing liquids

    High-concentration hydrogen peroxide is a powerful oxidizing liquid that can cause fires or explosions when it contacts organic material.

  6. Which WHMIS pictogram would appear on a product that can detonate or explode when subjected to heat or shock?

    Answer: Exploding bomb

    The exploding bomb pictogram is used for explosives, self-reactive substances (certain types), and organic peroxides that pose explosion risks.

  7. A substance that ignites spontaneously when exposed to air at ambient temperatures is classified under which WHMIS class?

    Answer: Class 4.2 – Pyrophoric Materials

    Pyrophoric materials (Class 4.2) are defined by their ability to self-ignite within five minutes of air exposure.