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CDL (Commercial Driver's License) Exam
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CDL (Commercial Driver's License) Exam
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25 Questions

1. Which of the following is not a common cause of vehicle fires?
2. Why should you be in the proper gear before starting down a hill?
3. You should decrease your following distance if somebody is following you too closely.
4. How do you find out how many seconds of following distance space you have?
5. What is the correct position of the shut-off valves for the last trailer of a doubles or triples set?
6. Pushing in the trailer air supply knob will do what?
7. How often must you stop while on the road to check your cargo?
8. What type of air do air brakes use?
9. Name two causes of tire fires?
10. What must you check before transporting a sealed load?
11. When should you inspect your vehicle?
12. Which of the following statements is FALSE regarding brake and accelerator interlock systems?
13. What is the correct trailer height when you connect the converter dolly to the rear trailer?
14. Which of the following procedures should you do when connecting the converter dolly to the rear trailer?
15. What is the correct position of the shut-off valves for the first trailer of a doubles or triples set?
16. Charge the trailer air brake system and push the air supply knob in. Shut the engine off. Step on and off the brake pedal several times to reduce the air pressure in the tanks. The trailer air supply control should pop out when the air pressure falls into the pressure range specified by the manufacturer.
17. When should you down shift automatic transmissions?
18. Why are placards used?
19. When you arrive at an area where a policeman or flagman is directing traffic, you should
20. Coffee and a little fresh air will help a drinker sober up?
21. When you turn suddenly while pulling double trailers which trailer is most likely to turn over?
22. What should you do if you do become sleepy while driving?
23. What are the two special conditions where you should downshift?
24. What should wheel bearing seals be checked for?
25. What is the main purpose of a trailer shut-off valve?

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