Pennsylvania CDL Double/Triple Trailers Practice Test

Why must you never rely on a converter dolly alone to support the front of an uncoupled semitrailer?

The dolly can move or fly up when weight is removed, causing injury or damage The dolly automatically locks the trailer brakes forever The dolly fifth wheel is stronger than landing gear Pennsylvania does not require landing gear on trailers

Correct Answer:

The dolly can move or fly up when weight is removed, causing injury or damage

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