cdl practice test

Doubles and Triples Practice Test


Question #1 of 18

Converter Dolly

What is a converter dolly?


A coupling device of one or two axles and a fifth wheel by which a semitrailer can be coupled to the rear of a tractor-trailer combination forming a double bottom rig.

A connection device of one axle used to disconnect a semitrailer combination vehicle converting it into two trailers.

A coupling device of three or four axles and a fifth wheel by which a semitrailer can be coupled to the rear of a tractor-trailer combination forming a hexagon bottom rig.

A coupling device of one or two axles and a sixth wheel by which a semitrailer can be coupled to the rear of a tractor-trailer combination forming a double bottom rig.

None of the above





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