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CDL Combination Practice Test Questions and Correct Answers the Latest Update and Recommended Version $9.89   Add to cart

Exam (elaborations)

CDL Combination Practice Test Questions and Correct Answers the Latest Update and Recommended Version

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  • CDL Combination
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  • CDL Combination

CDL Combination Practice Test Questions and Correct Answers the Latest Update and Recommended Version

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  • October 30, 2024
  • 4
  • 2024/2025
  • Exam (elaborations)
  • Questions & answers
  • CDL Combination
  • CDL Combination
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CDL Combination Practice Test Questions
and Correct Answers the Latest Update
and Recommended Version
You're hooking up a tractor to a semi-trailer and have backed up but are not under it. What

should you do before backing under the trailer?

✓ Hook up the emergency and service air lines.



After pushing in the trailer supply valve, you should not move the tractor

until air system is?

✓ At normal pressure



There are two things you can do to prevent a rollover. They are: Keep the cargo as close to

the ground as possible, and:

✓ Reduce speed before entering turns.



With the engine off and the brakes released, a combination vehicle air brake system shouldn't

leak more than how many psi in one minute?

✓ 3 psi



The fifth wheel locking lever isn't locked after the jaws close around the kingpin. This means

that:

✓ The coupling is not correct and should be corrected before driving the coupled unit.



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