773 735 1775
5028 S Archer Ave,
Chicago, IL

Ready For The CDL Test?

Find out with these quizes.

Quiz 2 - Combination Vehicles

1. Where should the tractor be when you inspect landing gear after uncoupling the trailer?



2. Glad hands are usually connecting which of these?



3. When driving a set of doubles it is necessary to close which shut-off valve in the last trailer.



4. The air brake leakage rate for a combination vehicle (engine off, brakes off) should be less than _____psi per minute.




5. You are about to back your tractor under a semi trailer. The trailer is at the right height when the:



6. If the brakes are not released when you pushed the trailer air supply valve you should:



7. Which part of the kingpin should the locking jaws close around?



8. You are coupling a tractor to a semi trailer and have backed up but are not under it. What should you hook up before backing under?



9. You supply air to the trailer tanks by:



10. Why should you be sure that the fifth wheel plate is greased as required?



11. When connecting the glad hands press the two seals with the coupler together at what degree to each other?



12. Why should you lock the tractor glad hands to each other (or dummy couplers) when you are not towing a trailer?



13. Air and electrical lines from the tractor to the trailer should be:



14. To stop a trailer skid you should:



15. Compared to a straight truck or bus there are ______ things to inspect in combination vehicle.







Correct of 15


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Call Now To Register for your CDL Classes at 773.735.1775

Columbia Truck Driving School

5028 South Archer Ave.
Chicago IL 60632
773 735 1775

Driving Yard - Training

6360 W. 73rd St.
Bedford Park, IL 60638


5028 South Archer Ave, Chicago IL 60632, 773 735 1775
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