E. LearndmvDMV PRACTICE
Find your state Exam types Practice tests Sign in Create account ↗
Practice quizzes / CDL HazMat Endorsement Practice Questions - Commercial Driver's License Hazardous Materials (H) Endorsement Exam / Question 67748
Practice question

Which of these is an example of a Class 4 hazardous material?

  1. Magnesium (a flammable solid)
  2. Oxygen
  3. Hydrochloric acid
  4. Uranium

Answer: A — Magnesium (a flammable solid)

The correct answer is shown above. Try the full quiz for additional practice.

Practice more: CDL HazMat Endorsement Practice Questions - Commercial Driver's License Hazardous Materials (H) Endorsement Exam →
Learndmv.

Thoughtful practice for the road ahead. Find permit, road signs and CDL preparation by state.

Explore

Practice by stateAll practice testsExam types

Your account

My profilePractice historyAccount security

Get started

Create accountSign inSitemap
© 2026 LearndmvIndependent practice resource · Not affiliated with any state DMV.