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TDG Practice Test 2026 – Free TDG Questions

Original questions written from the official Canada (national) handbook, with an explanation for every answer.

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  • 138 questions
  • 6 practice tests
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Under the TDG Act, what does "public safety" cover?

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Exam facts

Key facts: Transportation of Dangerous Goods (TDG) Certification Test

Free TDG practice tests written from the law itself: the Transportation of Dangerous Goods Act, 1992 and the current Transportation of Dangerous Goods Regulations, read on the federal Justice Laws website, plus Transport Canada's public TDG pages. Every question is original, explains the rule behind the answer and names the part and section it comes from. No sign-up, and your progress stays on your device.

There is no government TDG exam. Under the Regulations your employer decides whether you are adequately trained for your duties and then issues your TDG training certificate, often after a course that ends with a quiz. This site helps you get ready for that quiz and for the job itself: the nine classes, shipping documents, labels and placards, means of containment, training rules, emergency response assistance plans, reporting releases and the special cases you will use most.

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Sample TDG questions

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  1. 1Under the TDG Act, what does "public safety" cover?
    • A. Human life and health, property and the environment
    • B. Only the safety of drivers and train crews
    • C. Only damage to roads, rails and bridges
    • D. Only people living near a transport route

    The Act defines public safety broadly as the safety of human life and health and of property and the environment. It is not limited to transport workers, infrastructure or nearby residents.

  2. 2Who must classify dangerous goods before they are transported from a Canadian site?
    • A. The consignor
    • B. The consignee
    • C. The carrier
    • D. The driver

    The consignor must determine the classification before allowing a carrier to take possession of the goods. Carriers rely on the consignor's classification and shipping document.

  3. 3A driver is in the truck cab with dangerous goods on board. Where must the shipping document be?
    • A. In the glove box, locked away from view
    • B. In the trailer, in a holder next to the dangerous goods themselves
    • C. At the dispatch office, ready to be faxed
    • D. In a pocket on the driver's door or within the driver's reach

    While in the power unit, the driver keeps the shipping document in a pocket mounted on the driver's door or within reach, so responders can find it quickly.

  4. 4Where must the primary class placard appear on a loaded tank trailer?
    • A. On the front only
    • B. On each side and each end
    • C. On the rear only
    • D. On the left side and the rear

    The primary class placard for each dangerous good in a large means of containment must be displayed on each side and on each end. For a trailer, the front placard may go on the tractor.

  5. 5Under the 500 kg special case, which Parts of the Regulations still apply?
    • A. Part 6 training and Part 8 reporting still apply
    • B. Only Part 3 documents continue to apply
    • C. Only Part 7 on ERAPs continues to apply
    • D. No part of the Regulations applies at all

    Section 1.16 exempts the load from Parts 3 to 5 under conditions, but it does not exempt training (Part 6) or reporting (Part 8). Marks and a document are still required.

  6. 6An owner-operator truck driver works for himself. Who issues his TDG training certificate?
    • A. The company that sold him the online course
    • B. Transport Canada's regional office
    • C. The customer whose goods he carries
    • D. He issues it to himself once he is adequately trained

    A self-employed person who has reasonable grounds to believe they are adequately trained issues a training certificate to themself, with the same required information.

  7. 7Which goods are ERAPs designed for?
    • A. All goods carried on a highway
    • B. Only goods sold to the public
    • C. Certain higher-risk dangerous goods
    • D. Only goods shipped by air

    Transport Canada explains that an ERAP describes what to do if certain higher-risk dangerous goods are released or might be released during transport, to help emergency responders.

  8. 8A new warehouse worker has no certificate yet. When may they load dangerous goods?
    • A. Under the direct supervision of a trained, certified person who is present
    • B. Once they have signed up for a course next month
    • C. When a certified supervisor watches them on a camera feed
    • D. After watching a training video at home on their own time and passing a quiz

    Uncertified workers may perform the tasks only in the presence and under the direct supervision of a trained, certified person. Transport Canada says camera monitoring is not direct supervision.

  9. 9What is a compliance mark?
    • A. A placard that shows the primary class of the dangerous goods inside
    • B. A mark required by a safety standard, showing the container meets it
    • C. A stamp showing the driver completed TDG training
    • D. A sticker that shows the shipment passed a TDG inspection

    Any mark required by a safety standard is a compliance mark, such as UN packaging codes. Compliance marks must be visible and legible; placards and labels are dangerous goods marks.

  10. 10What does the code E0 in column 6(b) of Schedule 1 mean?
    • A. The goods are not permitted as an excepted quantity
    • B. The goods are exempt from every part of the Regulations
    • C. The goods may be shipped in any quantity by air
    • D. The goods need no label when shipped in small boxes

    Column 6(b) gives the excepted quantity code; E0 means the goods cannot be shipped as an excepted quantity. E1 to E5 set the maximum amounts per inner and outer container.

About the test

About the Transportation of Dangerous Goods (TDG) Certification Test

TDG stands for the Transportation of Dangerous Goods. The federal Transportation of Dangerous Goods Act, 1992 and its Regulations set the rules for anyone who imports, offers for transport, handles or transports dangerous goods in Canada by road, rail, ship or air. The goal is public safety, which the Act defines as the safety of human life and health and of property and the environment. Transport Canada writes the Regulations, inspects shippers and carriers, and runs CANUTEC, the national dangerous goods emergency centre.

The Regulations are organized in parts. Part 1 holds definitions and the special cases (exemptions) that many everyday shipments use. Part 2 explains how to classify goods into the nine classes and their divisions. Part 3 covers shipping documents, Part 4 the dangerous goods marks such as labels, placards and UN numbers, Part 5 the means of containment, Part 6 training, Part 7 emergency response assistance plans (ERAPs) and Part 8 reporting. Later parts deal with each mode of transport. Schedule 1 is the big table of UN numbers and shipping names that ties it all together.

Training is where most people meet TDG. Anyone who handles, offers for transport or transports dangerous goods must be adequately trained and hold a training certificate, unless they work under the direct supervision of someone who is trained and certified, or an exemption applies. "Adequately trained" means a sound knowledge of the topics that relate to your own duties: a warehouse worker who packs drums needs different training from a highway tank driver. The employer issues the certificate, signs it with the worker and keeps a copy and a record of the training.

The Regulations change from time to time. The version used for this site is the consolidation current to September 30, 2026, which includes amendments made in 2026. Some older course material still uses earlier wording, such as "safety marks" for what the Regulations now call dangerous goods marks, so focus on the rule rather than the exact label. When our notes and the official text differ, the official text wins.

ExamCanada is an independent study site. We are not Transport Canada, CANUTEC or a training provider, and a score on our practice tests is not a TDG certificate. Only your employer (or you, if you are self-employed) can issue that certificate. Our questions are written from the public law and Transport Canada guidance, not from any commercial TDG course.

Study plan

How to prepare

  1. 1Start with the definitions in Part 1: consignor, carrier, handling, offer for transport, in transport, and small versus large means of containment (450 L is the dividing line). Many questions turn on who is responsible for what.
  2. 2Learn the nine classes and their divisions as a list you can say out loud, then add the packing groups: PG I great danger, PG II medium danger, PG III minor danger. Know the Class 3 flash point (60 °C) and the boiling point and flash point cut-offs for its packing groups.
  3. 3Practise reading a shipping document. Write out the description order (UN number, shipping name, class, subsidiary class, packing group), the 24-hour number and the consignor's certification, and know where the driver keeps the document.
  4. 4Learn the difference between labels (small means of containment, at least 100 mm) and placards (large means of containment, at least 250 mm), when UN numbers must be shown, when the DANGER placard may be used and when the 500 kg placarding exemption applies.
  5. 5Memorize the training numbers: certificates expire after 36 months for road, rail and marine and 24 months for air, the employer keeps records until two years after expiry, and you must show your certificate to an inspector immediately.
  6. 6Study the special cases you are most likely to use at work, such as the 150 kg and 500 kg gross mass cases and limited quantities, including what each one does not exempt.
  7. 7Take one topic test at a time, then reread the section named under each question you miss. When you can score 25 or more out of 30 on two different mock exams in a row, you are ready for your employer's quiz.

FAQ

TDG test questions people ask

Is there an official government TDG test?

No. The TDG Regulations do not set a government exam. Your employer must have reasonable grounds to believe you are adequately trained before issuing your training certificate, and it decides how to check that, often with a quiz at the end of a course, a practical check or both. Transport Canada's training bulletin confirms it is up to employers to decide what adequate training is for each employee.

How long is a TDG certificate valid?

A TDG training certificate expires 36 months after it is issued for transport by road, rail or vessel, and 24 months after it is issued for transport by air (TDG Regulations, section 6.5). Your employer must keep a copy and a record of your training until two years after the certificate expires.

Who gives me my TDG certificate?

Your employer issues it once it is satisfied you are adequately trained for your duties. If you are self-employed, you issue your own certificate. A course provider's completion record can be part of the record of training, but the certificate itself must show your employer's name and address, your name, the expiry date and what you are trained to do, signed by you and your employer.

Does my TDG certificate move with me to a new job?

No. Transport Canada explains that training certificates are not transferable. A new employer must be satisfied that you are adequately trained for the duties in the new job and issue its own certificate. If you work for two employers at once, you hold a certificate from each.

How many questions are on a TDG test and what is the pass mark?

There is no official number of questions or pass mark, because each employer or training provider writes its own quiz. Our mock exam has 30 questions and you need 24 correct (80 percent) to pass. That is our own practice standard.

Are these the real TDG test answers?

No. Every question here is original and written from the TDG Act, the TDG Regulations and Transport Canada's public pages. We do not copy any training course. Learning the reason behind each rule is what lets you pass a quiz you have never seen and, more importantly, ship and carry dangerous goods safely.

Do I need TDG training to carry a few jerrycans of fuel?

Often not. The Regulations have special cases for small quantities. For example, diesel fuel or gasoline in containers totalling 2 000 L or less on a road vehicle, labelled and secured, does not need a training certificate (section 1.35), and many consumer quantities are covered by the 150 kg special case (section 1.15). Check the exact conditions before you rely on an exemption.

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