Practice question

What should be the primary study source for the Iowa CDL General Knowledge test?

  1. The Iowa DOT CDL Manual and official Iowa DOT CDL testing resources, supplemented by FMCSA standards
  2. Unofficial answer keys from practice-test sites
  3. Only social media advice
  4. A passenger-car owner manual

Answer: A — The Iowa DOT CDL Manual and official Iowa DOT CDL testing resources, supplemented by FMCSA standards

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