Free practice quiz · 8 questions

DOT Emergency Response Guidebook (ERG) Quiz

Answer every question, then press Check my answers to see your score and an explanation for each one. Study first with the guide: How to Use the DOT Emergency Response Guidebook (ERG).

1. The yellow-bordered pages of the ERG list materials by:

Answer: UN/NA ID number. Yellow pages are indexed by 4-digit ID number; blue pages by material name.

2. Which pages contain the numbered response guides?

Answer: Orange. Orange-bordered pages hold guides 111 to 174.

3. A highlighted entry in the yellow or blue pages means:

Answer: Use the green pages for isolation and protective action distances. Highlighted materials are toxic inhalation hazards, chemical warfare agents or water-reactive materials that produce toxic gas.

4. If a highlighted material is on fire, which distances should you use?

Answer: The evacuation distances in the orange guide. When there is a fire, use the evacuation information in the orange guide's public safety section.

5. What does the letter P after a guide number mean?

Answer: May polymerize violently. P indicates the material may undergo violent polymerization when heated or contaminated.

6. Hazard class 8 on a placard indicates:

Answer: Corrosives. Class 8 is corrosive materials.

7. When approaching a hazmat incident, you should approach from:

Answer: Upwind and uphill. Approach from upwind and uphill to stay out of vapors and runoff.

8. Why are night protective action distances often larger than day distances?

Answer: Calmer, more stable air at night lets vapors travel farther. Stable night-time air mixes less, so toxic vapor clouds stay concentrated over longer distances.

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