A driver is transporting a shipment of Division 4.1 Flammable Solids, specifically UN2926, Flammable Solid, Organic, N.O.S. (contains 2000 lbs of substance X). The Material Safety Data Sheet (MSDS) indicates that substance X has a flash point of 110°F (43.3°C) and a boiling point of 300°F (148.9°C). The shipping papers describe the material as 'Flammable Solid, Organic, N.O.S. (substance X), 4.1, UN2926, PG II'. Under these conditions, what is the primary hazard class and packing group that dictates the placarding requirements for this shipment?

Division 4.1 Flammable Solid, Packing Group II. The material is explicitly classified as a Division 4.1 Flammable Solid. The flash point and boiling point are secondary characteristics for classification within Division 4.1. Therefore, the primary hazard class is 4.1, and the packing group is II as specified on the shipping papers, dictating the placarding requirements.

You are hauling a load of Division 5.1 Oxidizers in 55-gallon drums, totaling 10,000 lbs. The shipping papers list the proper shipping name as 'Oxidizer, Liquid, N.O.S., 5.1, UN3082, PG III'. The vehicle is a straight truck (single unit, non-articulated). What placard is required for the front of this vehicle?

A Division 5.1 Oxidizer placard. For a straight truck transporting 10,000 lbs or more of Division 5.1 Oxidizers, the vehicle must be placarded with the Division 5.1 placard on all four sides. The 'Dangerous When Wet' placard is for specific Division 4.3 materials, and a 'Poison' placard is for Division 6.1 materials.

A driver is transporting a cargo tank filled with anhydrous ammonia (UN1005, Division 2.2, PG I). The cargo tank has a capacity of 5,000 gallons. The driver is operating in Maine and has a valid Hazmat endorsement. What is the minimum number of 8-inch square, or larger, placards required for this vehicle?

Four placards (front, rear, and both sides). Cargo tanks transporting hazardous materials that require placarding must display placards on all four sides (front, rear, and both sides). Anhydrous ammonia (UN1005) is a Division 2.2 gas that requires placarding once any amount is transported in a cargo tank. Therefore, four placards are required.

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Free Maine CDL Hazmat Endorsement Test practice test with 25 realistic multiple-choice questions, instant grading, and explanations. Study with drill mode, category score reports, and a personalized review plan.

Exam format

25 multiple-choice practice questions
Drill mode with instant feedback and explanations after each answer

Study tips

Review the official exam content outline before your first practice run.
Take the full practice exam once to establish a baseline score by category.
Focus review on categories where you score below the passing threshold.
Re-take missed questions in drill mode until you can explain each correct answer.
Schedule the real exam only after consistent passing scores on practice tests.

Sample CDL Hazmat Endorsement practice questions

Try a few representative questions below. Each includes the correct answer and a short explanation — the same style you'll see in the full practice test.

Question 1Placarding Requirements
A driver is transporting a shipment of Division 4.1 Flammable Solids, specifically UN2926, Flammable Solid, Organic, N.O.S. (contains 2000 lbs of substance X). The Material Safety Data Sheet (MSDS) indicates that substance X has a flash point of 110°F (43.3°C) and a boiling point of 300°F (148.9°C). The shipping papers describe the material as 'Flammable Solid, Organic, N.O.S. (substance X), 4.1, UN2926, PG II'. Under these conditions, what is the primary hazard class and packing group that dictates the placarding requirements for this shipment?
- A.Division 4.1 Flammable Solid, Packing Group II(Correct)
- B.Division 3 Flammable Liquid, Packing Group II
- C.Division 3 Flammable Liquid, Packing Group III
- D.Division 4.1 Flammable Solid, Packing Group III
Explanation
The material is explicitly classified as a Division 4.1 Flammable Solid. The flash point and boiling point are secondary characteristics for classification within Division 4.1. Therefore, the primary hazard class is 4.1, and the packing group is II as specified on the shipping papers, dictating the placarding requirements.
Question 2Placarding Requirements
You are hauling a load of Division 5.1 Oxidizers in 55-gallon drums, totaling 10,000 lbs. The shipping papers list the proper shipping name as 'Oxidizer, Liquid, N.O.S., 5.1, UN3082, PG III'. The vehicle is a straight truck (single unit, non-articulated). What placard is required for the front of this vehicle?
- A.A Division 5.1 Oxidizer placard(Correct)
- B.No placard is required for the front of a straight truck under 10,000 lbs of Oxidizers
- C.A Division 5.1 Oxidizer placard and a 'Poison' placard
- D.A Division 5.1 Oxidizer placard and a 'Dangerous When Wet' placard
Explanation
For a straight truck transporting 10,000 lbs or more of Division 5.1 Oxidizers, the vehicle must be placarded with the Division 5.1 placard on all four sides. The 'Dangerous When Wet' placard is for specific Division 4.3 materials, and a 'Poison' placard is for Division 6.1 materials.
Question 3Placarding Requirements
A driver is transporting a cargo tank filled with anhydrous ammonia (UN1005, Division 2.2, PG I). The cargo tank has a capacity of 5,000 gallons. The driver is operating in Maine and has a valid Hazmat endorsement. What is the minimum number of 8-inch square, or larger, placards required for this vehicle?
- A.Three placards (front, rear, and one side)
- B.Four placards (front, rear, and both sides)(Correct)
- C.Two placards (front and rear)
- D.Six placards (front, rear, both sides, and both ends of the tank)
Explanation
Cargo tanks transporting hazardous materials that require placarding must display placards on all four sides (front, rear, and both sides). Anhydrous ammonia (UN1005) is a Division 2.2 gas that requires placarding once any amount is transported in a cargo tank. Therefore, four placards are required.

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Frequently asked questions

How many questions are on this CDL Hazmat Endorsement practice test?

This practice test includes 25 multiple-choice questions designed to mirror the format and difficulty of the real Maine CDL Hazmat Endorsement Test.

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Yes. You can start practicing for free. Create an account to save progress, track weak categories, and retake the exam.

Do I get explanations after each question?

Yes. In drill mode you see why the correct answer is right, why distractors are wrong, and practical examples where relevant.

How should I use this practice test to prepare?

Take the full exam under timed conditions, review missed questions by category, then focus study on your weakest sections before scheduling the real exam.

Does this replace official exam materials?

No. Use this as a supplement alongside official candidate information bulletins, textbooks, and hands-on experience required for your license or certification.

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