Hazard classes, types of hazard, UN number and packing groups
The ADR divides dangerous goods into 13 classes. You learn which hazard lies behind each class, what the UN number and packing group mean and how to find the most important information in Table A.
- 27 questions in this topic
- Topic 3 of 14 in the course: ADR/SDR – dangerous goods driver: basic course, tank, classes 1 and 7
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From the key facts
- Classes: 1 explosive, 2 gases, 3 flammable liquids, 4.1/4.2/4.3, 5.1, 5.2, 6.1, 6.2, 7, 8, 9 (ADR 2.1.1.1).
- Each entry is assigned a four-digit UN number (ADR 2.1.1.2; ADR 3.2.1 column 1).
All key facts, the questions with explanations and the exam simulation are part of the course.
Sample questions from this topic
3 of 27 questions free to try. All questions with explanations and the exam simulation are part of the course.
Question 1: How many classes of dangerous goods does the ADR have?
- 11 classes, because Classes 7 and 9 are combined
- 9 classes (1 to 9) with no further division into subclasses
- 13 classes (1 to 9 with subclasses 4.1–4.3, 5.1–5.2, 6.1–6.2)
Show answer
Correct answer: 13 classes (1 to 9 with subclasses 4.1–4.3, 5.1–5.2, 6.1–6.2)
The ADR distinguishes Classes 1, 2, 3, 4.1, 4.2, 4.3, 5.1, 5.2, 6.1, 6.2, 7, 8 and 9 – 13 classes in total.
Legal reference: ADR 2.1.1.1
Question 2: Which hazard does Class 3 stand for?
- Oxidizing substances
- Flammable liquids
- Flammable solids
Show answer
Correct answer: Flammable liquids
Class 3 covers flammable liquids. Flammable solids are Class 4.1, oxidizing substances Class 5.1.
Legal reference: ADR 2.1.1.1
Question 3: Which class covers toxic substances?
- Class 8
- Class 6.2
- Class 6.1
Show answer
Correct answer: Class 6.1
Toxic substances belong to Class 6.1. Class 6.2 is infectious substances, Class 8 corrosive substances.
Legal reference: ADR 2.1.1.1