cdl practice test

Doubles and Triples Practice Test

Question #1 of 18

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

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

Park the rear trailer against another trailer, chock the tires and lock the trailer door.

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

All of the above.

None of the above.

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