cdl practice test

Doubles and Triples Practice Test


Question #1 of 18

Why should you pull a dolly out from under a trailer before you disconnect it from the trailer in front?


Because the book says so.

You can if you want to, it does not matter.

The dolly tow bar may fly up, possibly causing injury, and making it very difficult to re-couple.

The dolly tow bar may fly away, possibly causing panic, and making it very difficult to re-capture it.

None of the above.





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