NC CDL Combination Vehicles UPDATED ACTUAL Questions and CORRECT
Answers
1. You are coupling a semi-trailer It will be raised slightly when the tractor is backed under it.
to your tractor but have not yet
backed under, the trailer is at
the right height when:
2. You should not back a tractor At normal pressure.
under a trailer until the whole
air system is:
3. Which part of the kingpin The shank.
should the locking jaws close
around?
4. When you get ready to back Directly in front of the trailer.
under the semi-trailer you
should line up:
5. How should you test the trac- Pull gently forward in low gear against the locked trailer
tor semi-trailer connection for brakes, then look at it carefully.
security?
6. When should you use the hand Never.
valve to park a combination ve-
hicle?
7. You supply air to the trailer Pushing in the trailer air supply valve.
tanks by:
8. Why should you be sure that To prevent steering problems.
the fifth wheel plate is greased
as required?
, 9.
Answers
1. You are coupling a semi-trailer It will be raised slightly when the tractor is backed under it.
to your tractor but have not yet
backed under, the trailer is at
the right height when:
2. You should not back a tractor At normal pressure.
under a trailer until the whole
air system is:
3. Which part of the kingpin The shank.
should the locking jaws close
around?
4. When you get ready to back Directly in front of the trailer.
under the semi-trailer you
should line up:
5. How should you test the trac- Pull gently forward in low gear against the locked trailer
tor semi-trailer connection for brakes, then look at it carefully.
security?
6. When should you use the hand Never.
valve to park a combination ve-
hicle?
7. You supply air to the trailer Pushing in the trailer air supply valve.
tanks by:
8. Why should you be sure that To prevent steering problems.
the fifth wheel plate is greased
as required?
, 9.
