Do you get points taken off if you don't know the division numbers of class 2 cdl?
The hazmat knowledge test is scored on an overall passing percentage, so a question about Class 2 division numbers just costs that one point if you miss it, not a special deduction. There is no extra penalty for the divisions specifically. That said, the Class 2 gas divisions are common test material, so they are worth knowing well.
Scoring is by percentage, not per-topic penalties
The hazmat knowledge test is graded on your overall score against a passing percentage. There is no special deduction for a particular topic like the Class 2 division numbers. Missing such a question simply costs that one point toward your total, the same as any other question.
But the Class 2 divisions matter
Even without a special penalty, the Class 2 gas divisions are common material and worth knowing, because they are a classic look-alike set distinguished only by color. Knowing them protects your overall score and reflects a real recognition skill, so do not treat them as optional just because there is no extra penalty.
The Class 2 divisions
The three gas divisions to learn:
| Division | Color | Hazard |
|---|---|---|
| 2.1 | Red | Flammable gas (propane, LNG) |
| 2.2 | Green | Non-flammable gas (nitrogen, helium) |
| 2.3 | White | Toxic gas (skull symbol) |
All carry the number 2; color separates them. Confirm what your state tests in your manual.
Why they are worth knowing
The Class 2 divisions are exactly the kind of thing the test probes, because all three are gases sharing the number 2, separated only by color (and the skull for toxic). Mixing them up is a common, avoidable miss. So learning them is high-value even though no single question carries a special weight.
How to study and verify
Aim for a strong overall score by drilling the nine classes and the divisions, including the three Class 2 gases, with active recall. There is no special penalty for the divisions, but they are common, so know them. For the exact passing percentage and scoring, confirm with your official state CDL manual and licensing authority.
Frequently asked questions
- Do you lose extra points for missing Class 2 division numbers?
- No. The test is scored on an overall passing percentage, so a Class 2 division question costs one point like any other, with no special deduction. The divisions are common material, though, so learn them. Confirm scoring with your state.
- What are the Class 2 gas divisions?
- 2.1 flammable gas (red), 2.2 non-flammable gas (green), and 2.3 toxic gas (white, skull). All carry the number 2, so color separates them.
- Is the test scored per topic?
- No, it is an overall percentage score. No single topic carries a special penalty. Missing any question costs one point, so aim for solid recognition across all of it.