Skip to main content
Hero background

CDL Doubles and Triples Endorsement T Practice Test -5

Pass your CDL Doubles & Triples Endorsement Test with ease. Start here by taking this Free 25 question practice test, every question and answer is straight out of the Commercial Drivers License Handbook.
Questions number
Mistakes Allowed
Passing Score


A drive-wheel skid when pulling doubles could result in a jackknife when ______.
  • The trailer pushes the tow vehicle sideways.
  • The tractor brakes lock up.
  • The trailer slides off the right side of the road.
  • None of the listed answers.
A driver needs to be able to see a warning when the air pressure in the service air tanks fall below ______.
  • 60 psi.
  • 90 psi.
  • 125 psi.
  • 100 psi.
As you are inspecting your vehicle, start the engine and watch to see the pressure build from 50 to 90 psi within how many minutes?
  • An hour.
  • A minute.
  • Three minutes.
  • 20 minutes.
As you park your combination vehicle make sure to use the hand valve when?
  • Only on busy streets.
  • As you are backing up.
  • Never.
  • Mostly when you're parking on a downgrade.
If you are driving a long vehicle and cannot complete your turn without entering another traffic lane, you should _____.
  • Turn wide as you complete the turn.
  • Turn around.
  • Honk your loudly.
  • Brake completely.