Hazard Class Identification - ONLINE CDL SCHOOL

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Hazard Class Identification

Build confidence with 10 original questions about Hazard Class Identification. Review your answers and explanations after finishing.

Supplemental study practice. This is not a government licensing exam or ELDT certification, and does not replace hands-on training. Follow your state’s current handbook.

1 / 10

You are about to transport hazardous materials and notice a package is leaking. What should you do?

Place the leaking package on top of the load

Seal the leak with tape and continue

Do not transport the leaking package

Notify the shipper after delivery

2 / 10

A hazardous materials placard must be placed on the vehicle so that:

It is placed only on the rear door

It is easily seen from the direction it faces and is at least three inches from other markings

It is covered by a tarp for protection

It is attached directly to the cargo

3 / 10

You are reviewing a shipping paper and see the identification number ‘NA1993.’ What does the ‘NA’ prefix indicate?

The material is forbidden for international transport

The material is a generic hazardous material

The material is only transported by air

The shipping name is only used within the United States and Canada

4 / 10

A shipping paper lists both hazardous and non-hazardous materials. How should the hazardous materials be identified?

By being listed last on the shipping paper

By omitting the identification number

By using only abbreviations for the shipping name

By being entered first, highlighted, or marked with an 'X' or 'RQ' in the HM column

5 / 10

Before unloading hazardous materials from your vehicle, what is the first safety step you should take?

Check the temperature of the cargo

Remove all placards from the vehicle

Set the parking brake and make sure the vehicle will not move

Open the cargo doors to ventilate the area

6 / 10

You are transporting a hazardous material with a ‘G’ in Column 1 of the Hazardous Materials Table. What must be included on the shipping paper?

The driver's license number

The emergency response guidebook page

The technical name of the hazardous material

The shipper's EPA registration number

7 / 10

A bulk packaging of hazardous material has only residue left inside. What must you do regarding placards?

Placard the vehicle as required for the material

Remove all placards since it is only residue

Only placard the rear of the vehicle

Use a DANGEROUS placard regardless of the material

8 / 10

While reviewing a shipping paper, you see the letters ‘RQ’ before the shipping description. What does this indicate about the shipment?

It is restricted to air transport only

It contains a reportable quantity of a hazardous substance

It is a generic hazardous material

It is forbidden for transportation by highway

9 / 10

You are transporting a hazardous material labeled as ‘Inhalation Hazard.’ What must you do regarding placards?

Display the POISON INHALATION HAZARD or POISON GAS placard in addition to other required placards

No placards are necessary if under 1,000 pounds

Only use the hazard class placard

Use only the DANGEROUS placard

10 / 10

You are transporting two different Table 2 hazardous materials, with a total weight of 1,200 pounds, but no more than 2,205 pounds of any one class. What placarding option do you have?

Use only Table 1 placards

Only placard for the heaviest class

Use a DANGEROUS placard instead of separate placards for each class

No placards are required

Your score is

The average score is 0%

About the Hazard Class Identification practice quiz

This practice quiz focuses on Hazard Class Identification, listed under CDL Practice — Hazardous Materials. Use it to check what you understand, spot topics to revisit, and connect the material to safe, informed decisions on the road.

Before you begin

Keep your current CDL manual or course notes nearby. Read each prompt carefully and think through why an answer fits, especially when a question describes a vehicle, road, or workplace situation. Licensing rules and procedures can vary, so confirm requirements with current official materials for your state.

After you finish

Review any explanations shown with your results. Note unfamiliar terms or missed concepts, then revisit your manual or course notes before trying again. Use your score to guide study; understanding why an answer is correct matters more than the number alone.

Study note: These quizzes are independent study practice. They are not state licensing exams, official government materials, or ELDT certification, and they do not replace required training.

Explore CDL Tests to find more practice by subject.