CDL DOUBLES TRIPLES PRACTICE TEST NORTH CAROLINA

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Safely pulling double and triple trailers requires knowledge and skill. If you want to pull double or triple trailers, you must add the Doubles/Triples (T) endorsement to your Class A CDL. The North Carolina doubles triples test consists of 20 questions. To pass, you must correctly answer at least 16 questions (80%). The NC CDL doubles triples test covers the following sections of the North Carolina CDL Manual: Driving Safely, Air Brakes (if you plan to operate vehicles equipped with air brakes), Combination Vehicles, Doubles and Triples. Take this NC CDL practice test now to prepare for the actual test!
1. When backing, it is best to:
try to back in the direction of the drift.
back toward the passenger's side when possible.
use only the passenger's side mirror.
use a helper whenever possible.
2. To know how much space you should keep in front of you when driving at speeds below 40 mph, one good rule says you need at least ______ for each ______ of vehicle length.
3 seconds; 50 feet
1 second; 10 feet
2 seconds; 10 feet
1 second; 5 feet
3. You hear a loud "bang" which sounds like a tire blowout. You should:
inspect your tires with your mirrors.
assume you have a tire failure.
check the tires at the next stop.
keep driving as normal.
4. Another name for front-end header boards is:
containerized racks.
head belt.
cargo stopper.
headache racks.
5. Which of the following is most likely to roll over?
The middle trailer of a triple
The front trailer of a double
The rear trailer of a triple
The rear trailer of a double
6. How should you apply the brakes when going down a steep downgrade?
Apply the brakes when you reach the bottom of the downgrade.
You should not brake, and only use engine braking to prevent brake failure.
Apply the brakes as hard as you can without locking the wheels.
Apply the brakes whenever you reach your safe speed, until your speed has been reduced to 5 mph below your safe speed.
7. The application pressure gauge:
protects the tank and the rest of the system from too much pressure.
shows how much air pressure is being applied to the brakes.
stops the compressor from pumping air.
tells you how much pressure is in the air tanks.
8. When driving in extremely hot weather, if the air pressure in the tires is too high, you should:
continue driving.
let air out of the tires to decrease pressure.
call your supervisor.
stop and remain stopped until the tires cool off.
9. You should always try to back toward the driver's side because:
you can watch the rear of your vehicle out the side window.
you can more easily correct any steering errors.
backing toward the left side is more dangerous.
None of the above.
10. For safe handling, the heaviest trailer should be:
the last trailer.
behind the tractor.
the second trailer in a triple.
None of the above.
 
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Frequently Asked Questions

Teens between 15 and 18 years old must adhere to the age requirements of the Graduated Driver License law to obtain a class C driver license:

  • Limited learner’s permit ? You must be at least 15 and less than 18 and have completed a driver education course.
  • Limited provisional license ? You must be at least 16 and less than 18 and have held the limited learner’s permit for 12 months without any traffic violations in the previous 6 months.
  • Full provisional license ? You must be at least 16 and less than 18 and have held the limited provisional license for at least 6 months without any traffic violations.
If you are 18 years old, you may apply for a learner permit and obtain a full driver's license after completing the knowledge, vision, and driving tests.

Make an appointment online for the DMV written test by selecting the nearest driver license office. You can choose dates and times based on your preferences and the available options at different North Carolina DMV locations. 

First time applicant must bring the following documents:
  • One proof of identity and age.
  • One proof of a Social Security number.
  • One proof of North Carolina residency (two for an NC REAL ID).
  • One proof of legal presence (for applicants not born in the U.S.).

If you're under 18, you also need to show:
  • Driving Eligibility Certificate and a Driver's Education Certificate.
  • Proof of high school graduation or a GED.

You can check all the required documents here.

North Carolina provides DMV written tests in various languages. Additionally, oral tests can be requested if needed. Although language options are provided, it is advisable to have a basic understanding of English since road signs are always in English.

The best way to prepare for the DMV written test is by reading the North Carolina Driver’s Handbook, which contains information about road signs, safe driving practices, and road rules. After studying the manual, verify your preparation with our free practice tests!

For individuals under 18, it’s not permitted to use a cell phone while driving unless in emergency situations.

Other restrictions apply. If you have a limited learner’s permit:
  • You can drive only with a supervising driver (parent/legal guardian) who has held a license for at least five years.
  • For the first six months, you may drive only between 5:00 a.m. and 9:00 p.m.; afterward, you may drive anytime under supervision.
  • Both your passengers and you must wear seat belts or child safety restraints.

 If you have a limited provisional license:
  • You can drive alone from 5:00 a.m. to 9:00 p.m.
  • You may drive anytime under the supervision of a parent/guardian/driver approved by your parent/guardian who has held a license for at least five years. It's possible for you to drive alone anytime for work, volunteer fire, or emergency medical service activities.
  • Both your passengers and you must wear seat belts or child safety restraints.
  • You can transport no more than one passenger under 21, except for siblings.
A limited learner's permit is valid until your 18th birthday. If you need to renew it, visit a North Carolina DMV office.

If you don't pass your DMV written test, you can retake it after seven calendar days. Use this week to prepare for your next attempt by reviewing the sections of the manual that you didn't study accurately. If you find the exam difficult, sign up for DMV Premium, which offers numerous resources and practice tests to improve your preparation.

NC CDL Doubles Triples Test

Number of questions: 20
Correct answers to pass:16
Passing score:80%
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