NC CDL Combination Vehicles
Questions with expert curated
solutions ( GUARANTEED
SUCCESS )
You are coupling a semi-trailer to your tractor but have not yet
backed under, the trailer is at the right height when: - 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: - answer At normal pressure.
Which part of the kingpin should the locking jaws close around? -
answer The shank.
When you get ready to back under the semi-trailer you should line
up: - answer Directly in front of the trailer.
How should you test the tractor semi-trailer connection for
security? - 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? - answer Never.
, You supply air to the trailer tanks by: - answer Pushing in the
trailer air supply valve.
Why should you be sure that the fifth wheel plate is greased as
required? - answer To prevent steering problems.
After you supply air to the trailer, make sure the air lines are not
crossed and the trailer brakes are working. This is done by: -
answer Applying and releasing the trailer brakes and listening for
brake sounds.
There are two things that a driver can do to prevent a rollover.
They are: (1) Keep the cargo as close to the ground as possible;
and (2): - answer Go slowly around turns.
Before you back under a trailer, make sure the: - answer Trailer
brakes are locked.
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? - answer Nothing is likely to happen until
you try to apply the brakes.
The air leakage rate for a combination vehicle (engine off, brakes
on) should not be more than ___ PSI per minute. - answer 4
In normal driving, some drivers use the hand valve before
applying the brake pedal to prevent a jackknife. Which of these
Questions with expert curated
solutions ( GUARANTEED
SUCCESS )
You are coupling a semi-trailer to your tractor but have not yet
backed under, the trailer is at the right height when: - 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: - answer At normal pressure.
Which part of the kingpin should the locking jaws close around? -
answer The shank.
When you get ready to back under the semi-trailer you should line
up: - answer Directly in front of the trailer.
How should you test the tractor semi-trailer connection for
security? - 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? - answer Never.
, You supply air to the trailer tanks by: - answer Pushing in the
trailer air supply valve.
Why should you be sure that the fifth wheel plate is greased as
required? - answer To prevent steering problems.
After you supply air to the trailer, make sure the air lines are not
crossed and the trailer brakes are working. This is done by: -
answer Applying and releasing the trailer brakes and listening for
brake sounds.
There are two things that a driver can do to prevent a rollover.
They are: (1) Keep the cargo as close to the ground as possible;
and (2): - answer Go slowly around turns.
Before you back under a trailer, make sure the: - answer Trailer
brakes are locked.
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? - answer Nothing is likely to happen until
you try to apply the brakes.
The air leakage rate for a combination vehicle (engine off, brakes
on) should not be more than ___ PSI per minute. - answer 4
In normal driving, some drivers use the hand valve before
applying the brake pedal to prevent a jackknife. Which of these
