Practice question

What is the minimum age for an Iowa CDL, and what age is needed for interstate CMV operation?

  1. 16 for any CDL; 18 interstate
  2. 18 for a CDL; 21 for interstate travel
  3. 21 for all Iowa CDLs; 25 interstate
  4. 18 for all operations including interstate

Answer: B — 18 for a CDL; 21 for interstate travel

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