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Exam-Combination Test CDL Questions and Answers
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Exam-Combination Test CDL Questions and Answers
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Exam-Combination Test CDL Questions and AnswersIf you cross connect the two air lines the following will result Correct Answer-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? Correct Answer-Fully raised with the crank handle secured
in its bracket
Th trailer air supply control: Correct Answer-Is a red, eight sided knob
A device which connects the service and emergency air lines from the truck to the trailer is
called.. Correct Answer-Glad hands
If one of the glad hands on your blue air line is missing a seal: Correct Answer-You might
end up with a service line air leak
In order to supply air to the trailer, you must first: Correct Answer-Stop engine so you can
hear the brakes
, Exam-Combination Test CDL Questions and Answers
The hand valve should be used: Correct Answer-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 Correct Answer-4
When should you use the hand valve to park a combination vehicle? Correct Answer-Never
When you get ready to back under the semi-trailer you should line up Correct Answer-
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 Correct Answer-Nothing is
likely to happen until you try to apply the brakes
When uncoupling, if you park the trailer at an angle... Correct Answer-You could do
damage to the landing gear
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