free cdl practice tests

CDL Doubles and Triples Test

Question #1 of 10

What three methods can you use to secure a second trailer before coupling?

chalk the tires, park on level ground, charge the trailer air tank if it does not have spring brakes.

park the rear trailer against another trailer,chalk tires,lock the trailer door.

park on level ground,put chalk on the tires,charge the air tank.

All of the above

None of the above

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