CDL DOUBLES TRIPLES PRACTICE TEST LOUISIANA

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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 Louisiana doubles triples test consists of 20 questions. To pass, you must correctly answer at least 16 questions (80%). The LA CDL doubles triples test covers the following sections of the Louisiana CDL Manual: Driving Safely, Air Brakes (if you plan to operate vehicles equipped with air brakes), Combination Vehicles, Doubles and Triples. Take this LA CDL practice test now to prepare for the actual test!
1. You are driving a heavy vehicle with a manual transmission, and you have to stop on the shoulder while driving on an uphill grade. When putting your vehicle back in motion up the grade, you should:
shift down to a speed that you can control without using the brakes.
use the parking brake to hold the vehicle until the clutch engages.
keep the clutch slipping while slowly accelerating.
partly engage the clutch before you take your right foot off the brake.
2. The application pressure gauge:
shows how much air pressure is being applied to the brakes.
stops the compressor from pumping air.
protects the tank and the rest of the system from too much pressure.
tells you how much pressure is in the air tanks.
3. When approaching a double railroad track, you should:
remember that a train on one track may hide a train on the other track.
expect to hear a train when it's approaching.
remember that trains may be more frequent.
rely upon the presence of warning signals.
4. If the low air pressure warning light comes on, you should:
continue to drive normally.
call for help.
stop immediately.
set the parking brake.
5. Which of these statements about brakes is true?
Brake fade does not result from excessive heat.
The lighter the vehicle, the more heat the brakes absorb to stop it.
To stop, the brake shoes and linings are pushed against the outside of the drum.
None of the above.
6. Overloading a vehicle with cargo can have negative effects on all of the following except:
Steering
Speed control
Braking
Weight limits
7. During freezing weather, which area is most likely to be slippery after it rains?
Roads that look wet.
Bridges.
Shaded areas.
All of the above.
8. To prevent rollover, you should:
drive in the left lane whenever possible.
drive slower around corners.
drive faster on ramps and off ramps.
All of the above.
9. A bridge formula permits:
less maximum axle weight for axles that are far apart.
more maximum axle weight for axles that are far apart.
more maximum axle weight for axles that are closer together.
less maximum axle weight for axles that are close together.
10. If your ABS fails:
the first step is to get the vehicle off the road and stop.
you will have no brake function, and could lose control.
your tires might grab unexpectedly and you could lose control.
you will still have normal brake functions.
 
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Frequently Asked Questions

If you are 15 or 16 years old, you must adhere to the stages of the Graduated Driver Licensing (GDL) Program:
  • Stage 1 ? for a learner’s permit, you must be at least 15 years old.
  • Stage 2 ? for an intermediate license, you must be at least 16 years old and have held the permit for 6 months.
  • Stage 3 ? for a full license (class E), you must have completed stages 1 and 2 or be at least 17 years old.

To take the Louisiana DMV written test, contact a driver education provider or the Office of Motor Vehicles. Before you go, check if your chosen Louisiana OMV offers the permit tests and the available business hours.
If you are a first time applicant, you'll need:
  • One primary document, such as a birth certificate or passport.
  • Proof of your Social Security Number.
  • An additional form of identification (e.g., Louisiana college or university ID, employment ID card, etc.).
  • Proof of residence.
If you are a minor, a parent or legal guardian must accompany you to sign the application.


If you have difficulty understanding English, you can have a translator assist you during the knowledge test. However, it is advisable to have a basic understanding of English since road signs are always in English.

It is recommended to thoroughly read the Louisiana Driver's Handbook at least three times to acquire a comprehensive understanding of the road rules. Verify your knowledge with our free practice tests or sign up for DMV Premium to access additional resources. Once you are satisfied with your score, you are ready for the exam.

The DMV written test contains 40 questions regarding road signs, safe driving practices, and road rules. All questions are multiple-choice, so be sure to carefully read them before providing your answers.

You must answer at least 32 questions correctly, and you can miss up to 8 questions to pass the test. The minimum score required to succeed in the exam is 80%. Take your time during the exam to make sure you understand the questions well.

Under the Graduated Licensing Program, teens face specific restrictions.

Drivers with a learner’s permit:
  • Must drive with a licensed adult who is at least 21 years old, or a licensed family member who is at least 18 years old.
  • Cannot use a cell phone.

Drivers with an intermediate license:
  • Are restricted from driving between 11 p.m. and 5 a.m. unless accompanied by a licensed adult who is at least 21 years old or a licensed family member who is at least 18 years old.
  • Can only transport one passenger under 21 (excluding siblings) unless supervised by a licensed adult aged 21 or older between 6 p.m. and 5 a.m.
  • Cannot use a cell phone, except for emergencies. 

If you fail your DMV written test at a driver education provider, the policies vary depending on the driving school. Some may require you to pay for a retest, while others may include multiple attempts in the course. Be sure to check the specific rules of the driving school you are attending. If you fail the permit test at the Office of Motor Vehicles, you have the opportunity to retake the exam once on the same day, provided there is enough time available.

LA CDL Doubles Triples Test

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