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Oregon CDL — General Knowledge Practice Test 1

The Oregon CDL — General Knowledge knowledge test has ~50 questions; you need ~40 correct (80%) to pass.

This practice test follows that format: 50 questions, pass with 40 correct. Answer every page, then grade it to see the answers and explanations.

Questions 1–10 of 50

  1. 1.When may you use a drug that a doctor has given you while driving a CMV?
  2. 2.Which headlights should you use for the best visibility when driving in fog?
  3. 3.What should you do about any drug that hides fatigue?
  4. 4.How can you keep from rolling back when starting on a hill in a manual-transmission truck?
  5. 5.What shape are the placards that identify a load of hazardous materials?
  6. 6.Why should you not swing wide to the left before starting a right turn?
  7. 7.How long do you lose your CDL for a second out-of-service order violation within a ten-year period?
  8. 8.What does the round sign with a black symbol on a yellow background posted before a railroad crossing mean?
    Yellow round road sign
  9. 9.What three distances add up to total stopping distance?
  10. 10.How much alcohol can it take to show signs of impairment in some people?

0 of 50 answered