When coupling twin trailers, should you release the dolly brakes by opening the air tank petcock? Do you know the correct response? If not, you may want to take our Free Maryland CDL Double/Triple Trailers Practice Test to find out! All of our questions come with clarifications so that you can see what the correct response is even if you get it wrong. We ask you 20 multiple-choice questions on coupling and uncoupling trailers, checking air tanks, traffic safety, and the complexities of driving multiple-trailer hauls. Our questions are presented in the same format as the real thing, so you will get the chance to get comfortable with the material. Answer 80% of the questions correctly and you will pass our test!

Prepare to pass your endorsement exam and take our Free Maryland CDL Double/Triple Trailers Practice Test! You have nothing to lose and only more knowledge to gain on the way!

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Maryland CDL Double/Triple Trailers Overview:
20 Total number of questions:
16 Number of questions required to pass:
80 Percentage required to pass:
Maryland CDL Handbook 2019

Get the latest (2019) official MD CDL Handbook.