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WHMIS 2015 Workplace Safety · Question

When a hazard class is subdivided into categories, which category represents the highest level of hazard?

Category 1 is always the most hazardous within a WHMIS hazard class. As the number increases (e.g., Category 2, 3), the severity of the hazard decreases.

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Question: When a hazard class is subdivided into categories, which category represents the highest level of hazard?

Answer options:

  • Category 4 ✅ Category 1
  • Category A
  • Category 10

Correct answer: Category 1

Explanation: Category 1 is always the most hazardous within a WHMIS hazard class. As the number increases (e.g., Category 2, 3), the severity of the hazard decreases.

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