Study tips
Hazmat Flashcards vs Practice Tests: Which Is Better?
Flashcards and practice tests do different jobs in CDL hazmat prep. Here is what each is best for and how to combine them for the strongest results.
Lawrence Arya··5 min
Test prep
Hazmat Incident Reporting Requirements (Immediate and Written)
When a hazmat incident must be reported, the difference between immediate notice and the written report, and who to call. A CDL hazmat study guide.
Lawrence Arya··5 min
Test prep
Hazmat Loading and Unloading Safety Rules (CDL Study Guide)
The general hazmat loading and unloading rules CDL students need to know: no smoking, brakes set, careful handling, and the class-specific precautions.
Lawrence Arya··6 min
Placards
Hazmat Package Markings Explained (Beyond Placards and Labels)
What the markings on a hazmat package mean, from the shipping name and UN number to orientation arrows, and how markings differ from labels and placards.
Lawrence Arya··5 min
Test prep
Hazmat Parking and Attendance Rules (Can You Leave the Truck?)
Where you can park a placarded hazmat vehicle, when it must be attended, and the stricter rules for explosives. A CDL hazmat study guide.
Lawrence Arya··5 min
Placards
Hazmat Placard Placement Rules: Where Placards Go
Where hazmat placards must go on a vehicle: all four sides, point up, readable, and clear of clutter. A study guide to the placement rules CDL tests love.
Lawrence Arya··5 min
Placards
Hazmat Placard Specifications and Sizes (49 CFR 172.519)
How big a hazmat placard must be, the inner border, color and durability rules, and why the specs exist. A study guide to the placard specification rules.
Lawrence Arya··5 min
Placards
Hazmat Placard Symbols Explained (Every Diamond Icon)
A guide to every hazmat placard symbol: the flame, skull, trefoil, exploding bomb, dripping corrosive, and more, plus what each one tells you instantly.
Lawrence Arya··6 min
Placards
Hazmat Placard vs Label: What Is the Difference?
Placards and labels use the same diamond and colors but are not the same thing. Here is how they differ by size, placement, and the rules that govern them.
Lawrence Arya··5 min
Test prep
Hazmat Route and Tunnel Restrictions (Where You Can Drive)
Why hazmat vehicles face route restrictions, how tunnel and bridge limits work, and where designated routes and permits come into play.
Lawrence Arya··5 min
Test prep
Hazmat Security Plans Explained (49 CFR 172.800)
Who needs a hazmat security plan, what it must address, and how it relates to security training. A CDL hazmat study guide to the security rules.
Lawrence Arya··5 min
Test prep
Hazmat Segregation Rules: What Cannot Load Together
Why some hazardous materials cannot be loaded together, how the segregation table works, and the dangerous combinations CDL students should know.
Lawrence Arya··5 min