CDL Practice Tests

Doubles and Triples Test
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Question #1 of 24

Doubles and Triples Test Question Image

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.



Doubles and Triples Endorsement Requirements

Each applicant for the doubles and triples endorsement must have knowledge covering procedures for assembly and hookup of the units, proper placement of heaviest trailer, as well as handling and stability characteristics.

The applicant must also be able to identify potential problems in traffic operations, including problems the motor vehicle creates for other motorists due to slower speeds on steep grades, longer passing times, possibility for blocking entry of other motor vehicles on freeways, splash and spray impacts, aerodynamic buffeting, view blockages, and lateral placement as well as operating practices and procedures not otherwise specified.

CDL Test Source: Electronic Code of Federal Regulations.

 

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