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Practice quizzes / ID CDL General Knowledge Practice Questions - Idaho CDL General Knowledge Test Exam / Question 98002
Practice question

How long before driving a CMV is alcohol use prohibited under federal rules?

  1. 4 hours
  2. 30 minutes
  3. 1 hour
  4. Only while the engine is running

Answer: A — 4 hours

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

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