Exam (elaborations)
NC CDL Exam-Combination Vehicles Test Questions and Answers
- Course
- Institution
NC CDL Exam-Combination Vehicles Test Questions and Answers
[Show more]
Content preview
NC CDL Exam-Combination Vehicles Test Questions andAnswers
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.
, NC CDL Exam-Combination Vehicles Test Questions and
Answers
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 the trailer
brakes are working. This is done by: Correct 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): Correct Answer-Go slowly around turns.
Before you back under a trailer, make sure the: Correct Answer-Trailer brakes are locked.
, NC CDL Exam-Combination Vehicles Test Questions and
Answers
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.
The air leakage rate for a combination vehicle (engine off, brakes on) should not be more than
___ PSI per minute. Correct Answer-4
In normal driving, some drivers use the hand valve before applying the brake pedal to prevent
a jackknife. Which of these statements is true? Correct Answer-If the trailer has not spring
brakes, you can drive away, but you will not have trailer brakes.
Why should you lock the tractor glad hands (or dummy couplers) to each other when you are
not towing a trailer? Correct Answer-It will keep dirt and water out of the lines.
For coupling to be completed, the safety catch for the fifth wheel locking lever must be:
Correct Answer-Over the locking lever.
The benefits of buying summaries with Stuvia:
Guaranteed quality through customer reviews
Stuvia customers have reviewed more than 700,000 summaries. This how you know that you are buying the best documents.
Quick and easy check-out
You can quickly pay through credit card or Stuvia-credit for the summaries. There is no membership needed.
Focus on what matters
Your fellow students write the study notes themselves, which is why the documents are always reliable and up-to-date. This ensures you quickly get to the core!
Frequently asked questions
What do I get when I buy this document?
You get a PDF, available immediately after your purchase. The purchased document is accessible anytime, anywhere and indefinitely through your profile.
Satisfaction guarantee: how does it work?
Our satisfaction guarantee ensures that you always find a study document that suits you well. You fill out a form, and our customer service team takes care of the rest.
Who am I buying these notes from?
Stuvia is a marketplace, so you are not buying this document from us, but from seller GOLDTUTORS. Stuvia facilitates payment to the seller.
Will I be stuck with a subscription?
No, you only buy these notes for $12.49. You're not tied to anything after your purchase.
Can Stuvia be trusted?
4.6 stars on Google & Trustpilot (+1000 reviews)
76747 documents were sold in the last 30 days
Founded in 2010, the go-to place to buy study notes for 14 years now
