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CDL Combination Test Questions and Correct Answers the Latest Update and Recommended Version $10.49   Add to cart

Exam (elaborations)

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

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  • Course
  • CDL Combination
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  • CDL Combination

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

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  • October 30, 2024
  • 13
  • 2024/2025
  • Exam (elaborations)
  • Questions & answers
  • CDL Combination
  • CDL Combination
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CDL Combination Test Questions and
Correct Answers the Latest Update and
Recommended Version
If you cross connect the two air lines the following will result

✓ You will not have air going to the trailer brakes



You have coupled with a semi-trailer. In what position should you put the front trailer supports

before driving away?

✓ Fully raised with the crank handle secured in its bracket



Th trailer air supply control:

✓ Is a red, eight sided knob



A device which connects the service and emergency air lines from the truck to the trailer is

called..

✓ Glad hands



If one of the glad hands on your blue air line is missing a seal:

✓ You might end up with a service line air leak



In order to supply air to the trailer, you must first:

✓ Stop engine so you can hear the brakes



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The hand valve should be used:

✓ To test the trailer brakes



The air leakage rate for a combination vehicle (engine off, brakes on) should not be more

than _______ psi per minute

✓ 4



When should you use the hand valve to park a combination vehicle?

✓ Never



When you get ready to back under the semi-trailer you should line up

✓ Directly in front of the trailer



If the service air line comes apart while you are driving a combination vehicle but the

emergency line stays together, what will happen right away

✓ Nothing is likely to happen until you try to apply the brakes



When uncoupling, if you park the trailer at an angle...

✓ You could do damage to the landing gear



Which of these statements is true?




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