Nc Cdl Combination Vehicles Exam Questions With 100% Correct Answers | Verified |updated

NC CDL Combination Vehicles Exam Questions with 100% Correct Answers | Verified |Updated You are coupling a semi-trailer to your tractor but have not yet backed under, the trailer is at the right height when: - Correct Answer-It will be raised slightly when the tractor is backed under it. You should not back a tractor under a trailer until the whole air system is: - Correct Answer-At normal pressure. Which part of the kingpin should the locking jaws close around? - Correct Answer-The shank. When you get ready to back under the semi-trailer you should line up: - Correct Answer-Directly in front of the trailer.How should you test the tractor semi-trailer connection for security? - Correct Answer-Pull gently forward in low gear against the locked trailer brakes, then look at it carefully. When should you use the hand valve to park a combination vehicle? - Correct Answer-Never. You supply air to the trailer tanks by: - Correct Answer-Pushing in the trailer air supply valve. Why should you be sure that the fifth wheel plate is greased as required? - Correct Answer-To prevent steering problems. After you supply air to the trailer, make sure the air lines are not crossed and