26 questions from the WHMIS (Canada) practice test.
10 questions, graded as you go, with the reason for every answer. No sign-up.
A worker eats lunch at a workbench without washing after handling a lead-based product. Which route of entry is the main concern?
A. Ingestion
Product on the hands is transferred to food and swallowed, which is ingestion. This is why eating, drinking and smoking are kept out of work areas and why hand washing matters.
Reference: CCOHS, How Workplace Chemicals Enter the Body
A worker's finger is punctured by a jet of fluid from a pinhole leak in a high-pressure line. Which route of entry is this?
A. Injection
Injection means a substance is forced through the skin, by a needle, a contaminated sharp object, or a high-pressure stream. Absorption is the tempting answer, but it means a substance passing through intact skin on contact.
Reference: CCOHS, How Workplace Chemicals Enter the Body
Some solvents cause harm inside the body after contact with unbroken skin. What is this route of entry called?
B. Absorption
Absorption is the passage of a substance through intact skin or the eyes into the bloodstream. Injection requires the skin to be punctured or broken.
Reference: CCOHS, How Workplace Chemicals Enter the Body