The Commercial Drivers License (CDL) Study Guide


Test Your Knowledge (These are questions you must know. The links to the material are provided in hypertext) For more questions in a testing format click here.

1. How do you find out how many seconds of following distance space you have?

2. If you are driving a 30 foot vehicle at 55 m.p.h. how many seconds of following distance should you allow?

3. You should decrease your following distance if somebody is following you too closely. True or false?

4. If you swing wide to the left before turning right, another driver may try to pass you on the right. True or false?

5. What is the most important reason for doing vehicle inspections?

6. What things should you be inspecting and check during a trip?

7. Name some key steering system parts.

8. Name some suspension system defects.

9. What three kinds of emergency equipment must you have?

10. What is the minimum tread depth for front tires?

11. . . . for other tires?

12. Why should you back toward the driver's side?

13. What is a pull-up?

14. If stopped on a hill, how can you start moving without rolling back?

15. When backing, why is it important to use a helper?

16. What's the most important hand signal that you and the helper should agree on?

17. What are the two special conditions where you should downshift?

18. When should you downshift automatic transmissions?

19. Retarders keep you from skidding when the road is slippery. True or false?

20. What are two ways to know when to shift?

21. How far ahead does the manual say you should look?

22. What are two main things to look for ahead?

23. What's your most important way to see to the sides and rear?

24. What does “ communicating” mean in safe driving?

25. Where should your reflectors be placed when stopped on a divided highway?

26. What three things add up to total stopping distance?

27. If you go twice as fast, will your stopping distance increase by twice or by four times?

28. Empty trucks have the best braking. True or false?

29. What is hydroplaning?

30.What is “black ice?”

31. You should use low beams whenever you can. True or false?

32. What should you do before you drive if you are drowsy?

33. What effects can wet brakes cause? How can you avoid these problems?

34. You should let air out of hot tires so the pressure goes back to normal. True or false?

35. You can safely remove the radiator cap as long as the engine isn't overheated. .


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