Free practice quiz · 8 questions

Toxicology Basics Quiz for Hazmat Workers

Answer every question, then press Check my answers to see your score and an explanation for each one. Study first with the guide: Toxicology Basics for Hazmat Workers: Dose, Routes and Health Effects.

1. A chemical with a lower LD50 is:

Answer: More acutely toxic. A smaller dose kills half the test animals, so the chemical is more acutely toxic.

2. Dose depends on concentration, duration and:

Answer: Frequency. How often exposure happens matters along with how much and how long.

3. An acid burn on the skin is an example of a:

Answer: Local effect. Local effects occur where the chemical contacts the body.

4. Carbon monoxide is a:

Answer: Chemical asphyxiant. CO binds to hemoglobin and stops the blood carrying oxygen, so it is a chemical asphyxiant.

5. A worker reacts more strongly each time they are exposed to a chemical. The chemical is likely a:

Answer: Sensitizer. Sensitizers cause allergic reactions that can worsen with repeated exposure.

6. Smoking plus asbestos exposure raises lung cancer risk far more than either alone. This is:

Answer: Synergistic. A synergistic effect is greater than the sum of the separate effects.

7. The organ a chemical mainly damages after absorption is called its:

Answer: Target organ. For example, the liver is a target organ of carbon tetrachloride.

8. A "skin" notation on an exposure limit means:

Answer: The chemical can be absorbed through the skin. Skin absorption can add to the dose, so airborne limits alone do not protect workers.

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