CDL Combination Vehicle Test

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1. The safest way to make turn without entering another traffic lane is:
2. How should you test the tractor-semitrailer connection for security?
3. The air brake leakage rate for a combination vehicle (engine off, brakes off) should be less than___ psi per minute
4. The tractor protection valve will close and the trailer emergency brakes will come on when there is a major leak in the ____ brake line
5. When connecting the glad hands press the two seasl with the coupler togethre at what degree to each other>
6. Off-tracking or cheating causes of which of these to follow the wider pass while making a turn?
7. You supply air to the trailer tanks by:
8. Off-tracking or cheating causes of which of these to follow the wider pass while making a turn?
9. After you lock the kingpin into the fifth wheel, you should check the connection by:
10. Air brake equipped trailers made before 1975:
11. How much space should be allowed between upper and lower fifth wheel after coupling?
12. A tractor with a _____ trailers requires the shortest amount of stopping distance.
13. Before you back under a trailer, make sure that:

14. After connecting the air lines but before backing under the trailer you should:
15. Why should you lock the tractor glad hands to each other (or dummy couplers) when you are not towing a trailer?
16. You are coupling a tractor to a semitrailer and have backed up but are not under it. What should you hook up before backing under?
17. After the trailer has been coupled to the tractor, the tractor protection control valve should be placed in what position?
18. When coupling, the proper position of the fifth wheel is:
19. What gear should the tractor engine be in after you uncouple the trailer and are inspecting the trailer supports?
20. While driving behind other vehicle under good condition you should allow at least one second between your vehicle ahead for each ______ (how many) feet of your vehicle length?

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