ADR Hazard Plates
Half of all candidates fail the theory test. Our students pass. Practice with realistic questions and get explanations for every answer.
Our prices
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ADR Hazard Plates - 7 days
- Personal guidance
- Fast user support
- Answer key for all questions
- Text-to-speech for all questions
- All 99 hazard ID numbers from ADR 2025
- Most common UN numbers and substances
- Reading ADR orange-coloured plates
- Digit meanings and X prefix
- Practical incident preparedness
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Best value
ADR Hazard Plates - 30 days
- Personal guidance
- Fast user support
- Answer key for all questions
- Text-to-speech for all questions
- All 99 hazard ID numbers from ADR 2025
- Most common UN numbers and substances
- Reading ADR orange-coloured plates
- Digit meanings and X prefix
- Practical incident preparedness
- Pass guarantee included
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ADR Hazard Plates - 14 days
- Personal guidance
- Fast user support
- Answer key for all questions
- Text-to-speech for all questions
- All 99 hazard ID numbers from ADR 2025
- Most common UN numbers and substances
- Reading ADR orange-coloured plates
- Digit meanings and X prefix
- Practical incident preparedness
Not satisfied? We offer a pass guarantee
What do I get?
- Access to all 461 exercises for plates
- 7 topics covering the entire curriculum
- Detailed explanations for every question
- Access starts immediately – valid for the full period
How does it work?
- Pay and get access immediately
- Choose short test or full test
- See the answer key and explanation after each question
- Max 5 errors out of 25 to pass
Why choose Prove.no?
Personal guidance
When purchasing access, we can answer any question you may have regarding your driver's license.
We have more than 20 years experience with teaching traffic theory, and are ready to help you when you need it.
Clear illustrations
Our illustrations present traffic situations as clearly as possible.
The illustrations are made to be easily understandable even though the traffic situation may be complex.
Your fastest path to a Norwegian license
In a customer survey, 81% of our students said they passed their theory test on the first try.
Good preparation is the key to passing – and that is exactly what we help you with.
Large question bank
Our question bank covers all topics from the official curriculum.
Each question includes detailed explanations from traffic experts.
Customer feedback
We have gathered some of the feedback our customers have given. See more customer feedback.
I just wanted to thank you for the help when taking my driver's license. Have used prove.no to practise for the theoretic test, and I got exactly the same questions on the theoretic test as I did on prove.no. Got 0 mistakes! Thank you very much.
Pretty good.
Ready to practice?
Theory test coming up? Most people need 2–3 weeks of practice. Start with a free demo today.
What's covered
- ADR orange plates — format and structure
- Upper number — hazard ID (Kemler code), 99 codes
- Lower number — UN substance number
- Digit meanings and doubling (33 = highly flammable)
- X prefix — reacts dangerously with water
- Special hazard numbers (336, 423, 539 and more)
- Combined reading of hazard ID + UN number
Frequently asked questions
Is ADR Hazard Plates an official DSB exam?
No. ADR Hazard Plates is a practice tool for learning to read orange ADR plates — it is not an official DSB exam. The official ADR exam at DSB is the basic course exam (G-ADR), optionally combined with specializations. Use the Hazard Plates test as a supplement to the ADR basic course.
How many questions and how many errors are allowed?
The full version has 25 questions with max 5 errors — you need at least 20 of 25 correct to pass the practice test. The shorter practice test has 15 questions for quicker repetition.
What do the numbers on an orange ADR plate mean?
The upper number is the hazard ID (Kemler code) describing the type of hazard — the first digit indicates the main hazard, and doubling intensifies it (33 = highly flammable liquid). The lower number is the UN number identifying the substance itself (e.g. 1203 = petrol). An X prefix means the substance reacts dangerously with water.
Who benefits from practising hazard plates?
Drivers taking the ADR basic course, fire and rescue crews, police, factory staff and logistics workers all benefit from being able to read orange ADR plates quickly and correctly. Correct interpretation of hazard numbers is critical during dangerous goods incidents.
What does the X prefix in front of a hazard number mean?
The X prefix in front of a hazard number means the substance reacts dangerously with water. Example: X423 — flammable solid that forms flammable gas on contact with water. Water must never be used as an extinguishing agent without expert assessment.
Categories
We cover all 7 chapters described in the curriculum.
Hazard number interpretation
Interpreting hazard numbers (Kemler codes) on the orange UN plate.
- What the top number on the orange plate means
- Three-digit hazard numbers and their meanings
- Recognising hazard class from the hazard number
- Special codes such as X prefix and doubled digits
Hazard number from description
Finding the correct hazard number from a description of the hazard.
- Matching hazard descriptions to hazard numbers
- Distinguishing between similar hazard numbers
- Understanding combinations of hazard properties
- Selecting the correct code among multiple options
Substance from UN number
Identifying the substance based on the UN number (bottom number) on the orange plate.
- Recognising common UN numbers and their substances
- Reading a complete orange plate with both hazard and UN numbers
- Distinguishing between substances with similar UN numbers
UN number from substance
Finding the correct UN number from a given substance name.
- Matching common substances to their UN numbers
- Distinguishing between substances with similar names
- Knowing UN numbers for the most commonly transported dangerous goods
Digit interpretation
Understanding the meaning of individual digits in the hazard number.
- What digits 2-9 mean individually
- The meaning of the X prefix (reacts dangerously with water)
- Doubled digits and intensified hazard
- How digits combine into a complete hazard number
Combined reading
Reading and interpreting a complete orange UN plate with both numbers.
- Identifying both hazard properties and substance from a plate
- Combining knowledge of hazard numbers and UN numbers
- Assessing the overall risk picture from plate information
Practical preparedness
Practical use of plate information in emergency situations.
- Reading the plate and assessing which precautions are needed
- Basic measures in dangerous goods incidents
- Safety zones and evacuation based on hazard properties
- Alerting emergency services with correct information from the plate