10 questions, graded as you go, with the reason for every answer. No sign-up.
What this covers
Pictogram basics
Flame
Flame over circle
Gas cylinder
Corrosion
Skull and crossbones
Health hazard
Exclamation mark
Exploding bomb
No pictogram
Environment
Biohazard
Sample questions
Which WHMIS pictogram is the only one that uses a round black border instead of a red diamond-shaped border?
Gas cylinder
Health hazard
Biohazardous infectious materials
Flame over circle
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C. Biohazardous infectious materials
The biohazardous infectious materials pictogram is a black symbol inside a round black border. That class is a Canadian addition that is not part of GHS, so its pictogram kept a different look. All the other WHMIS pictograms use the red diamond-shaped border.
Reference: Hazardous Products Regulations (SOR/2015-17), Schedule 3 (pictograms) and Part 3
A cylinder label shows only the gas cylinder pictogram. Which hazard should the worker expect?
The contents will ignite if released near a pilot light or a spark
The contents are fatal if a small amount is inhaled
The contents will corrode the cylinder from the inside over time
The cylinder may explode if heated or rocket if its valve breaks
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D. The cylinder may explode if heated or rocket if its valve breaks
The gas cylinder pictogram warns of the stored pressure itself: a heated cylinder can burst, and a damaged valve can turn it into a projectile. Flammability or toxicity would be shown by additional pictograms.
Reference: Hazardous Products Regulations (SOR/2015-17), Part 7 and Schedule 3, gases under pressure
The corrosion pictogram shows liquid pouring onto a hand and onto a piece of metal. Which hazards does it cover?
Skin irritation, eye irritation, and skin sensitization
Corrosive to metals, skin corrosion, and serious eye damage
Acute toxicity by skin contact, and aspiration hazard
Oxidizing liquids, organic peroxides, and pyrophoric liquids
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B. Corrosive to metals, skin corrosion, and serious eye damage
The corrosion pictogram is used for products that are corrosive to metals, that cause skin corrosion (burns), or that cause serious eye damage. Milder, reversible skin and eye irritation is shown with the exclamation mark instead.
Reference: Hazardous Products Regulations (SOR/2015-17), Schedule 3 (pictograms) and Part 3
