← CDL Hazmat Rules – General Knowledge Flashcards

Free CDL Hazmat Rules – General Knowledge Flashcards Practice Test (2026)

50 questions · 60 min · 80% to pass

50 Questions · 60 Minutes · 80% to Pass

Question 1 of 5

Sample Questions

Question 1

At what minimum quantity of hazardous materials in a single package requires a placard regardless of hazard class?

Answer: Any single package containing 1,001 lbs or more of a Table 2 hazardous material requires a placard. For Table 1 materials, any amount requires a placard.

Question 2

What shape are hazmat placards required to be?

Answer: Hazmat placards must be diamond-shaped (square on point).

Question 3

Where must hazmat placards be placed on a vehicle?

Answer: Placards must be placed on the front, rear, and both sides of the vehicle — four placards total.

Question 4

What is the minimum size requirement for hazmat placards?

Answer: Hazmat placards must be at least 10¾ inches (273 mm) on each side.

Question 5

Which hazard class always requires a placard regardless of the quantity being transported?

Answer: Table 1 hazardous materials — including explosives, poison gas, and radioactive materials — always require placards in any amount.