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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 Maryland doubles triples test consists of 20 questions. To pass, you must correctly answer at least 16 questions (80%). The MD CDL doubles triples test covers the following sections of the Maryland CDL Manual: Driving Safely, Air Brakes (if you plan to operate vehicles equipped with air brakes), Combination Vehicles, Doubles and Triples. Take this MD CDL practice test now to prepare for the actual test!
1. Placards are:
devices placed below a vehicle to improve traction.
a type of safety equipment.
signs put inside a vehicle used to warn others of hazardous materials.
signs placed on a vehicle to identify the hazard class of the cargo.
2. When backing a trailer, you should turn the steering wheel to the right to make the trailer go left (or vice versa). Once the trailer starts to turn, you should:
keep backing up.
turn the wheel more  in the direction you want to go.
turn the wheel the other way to follow the trailer.
None of the above.
3. Another name for front-end header boards is:
head belt.
headache racks.
cargo stopper.
containerized racks.
4. The tire load for each tire is stated:
on the inside of the tire.
on the side of the tire.
on the tread of the tire.
on the vehicle's operator manual.
5. Most heavy-duty vehicles use:
solid brakes.
pressure brakes.
air brakes.
hydraulic brakes.
6. _________ rigs are much more likely to roll over in an accident than _________ rigs.
Fully loaded ; overloaded
Empty ; fully loaded
Empty ; overloaded
Fully loaded ; empty
7. It is safer to drive over (rather than to avoid) which of the following?
Plastic containers
Cardboard boxes
Paper and cloth sacks
None of the above.
8. For safety during a trip, you should:
watch gauges for signs of trouble.
check critical items when you stop.
use your senses to check for problems.
All of the above.
9. When driving in very hot weather, you may have to:
watch out for black ice.
increase your speed until the tires cool off.
decrease your following distance.
reduce your speed to prevent overheating.
10. You hear a loud "bang" which sounds like a tire blowout. You should:
inspect your tires with your mirrors.
check the tires at the next stop.
keep driving as normal.
assume you have a tire failure.
 
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Frequently Asked Questions

The age requirements to obtain a class C driver's license in Maryland are established by the three-steps of the Rookie Driver Program:
  • Learner’s instructional permit ? you must be at least 15 years and 9 months.
  • Provisional license ? you must be at least 16 years and 6 months.
  • Driver’s license ? you must be at least 18 years old and have held a provisional license for at least 18 months.

To schedule the MVA written test for a learner’s permit, complete the pre-application. You can visit any Maryland Motor Vehicle Administration (MVA) office, and upon successful completion of your exam, the permit will be mailed to you.

You must bring the following documents:
  • Proof of identity.
  • Proof of Social Security Number or proof of ineligibility.
  • Two Maryland residency documents. If you are under 18, provide one document and bring your parents/guardians with acceptable proof of your relationship.
  • For applicants under 16, a certificate of school attendance must be provided either by the applicant's school or by a parent or guardian.
For a complete list of acceptable documents, refer to the official Maryland Document Guide.


The MVA written test in Maryland is available in English, Spanish, Vietnamese, Korean, French, and Traditional Chinese. You also have the option to schedule an oral exam. Foreign language interpreters are allowed, but applicants must pay their fee. For those who are hearing impaired, the MVD offers assistance free of charge.

You should read the Maryland Driver's Handbook to familiarize yourself with the most common road rules and safe driving practices. Evaluate your knowledge with our free practice tests, or sign up for DMV Premium to unlock exclusive PDF Cheat Sheets!

The Maryland MVA written test comprises 25 questions, and you have 20 minutes to complete it. You should study the manual carefully to ensure your success on the first attempt.
A score of 88% or better is required to pass the MVA written test, so you can miss up to 3 questions. Be cautious and read thoroughly the questions.
For new drivers in Maryland, there are specific restrictions based on their age and licensing stage.

Learner’s permit holders:
  • Are not allowed to use a cell phone, including hands-free devices, except for emergency calls.
  • Must be accompanied by a driver aged 21 or older, with a minimum of 3 years of driving experience, seated in the front passenger seat.
Provisional license holders (Under 18):
  • Cannot drive with passengers under 18, except siblings, for the first 151 days, unless accompanied by a supervising driver.
  • Cannot drive between midnight and 5 am unless supervised by a licensed driver aged 21 or older with at least 3 years of driving experience, or for work, school, volunteer, or sports activities.
  • Are not allowed to use a cell phone, including hands-free devices, except for emergency calls.
  • Must wear safety belts and ensure that other passengers use them.
For all drivers under 21, it's illegal to drive after drinking any amount of alcohol.  

A Maryland learner’s permit is valid for 2 years from the date of issuance. If the permit expires before you can complete or pass the skill test, you will need to reapply for a new permit and retake the knowledge test.

If you fail your MVA written test, you need to schedule another appointment at an MVA office. You can retake the exam the next business day after the first failure. However, if you fail two or more times, you must wait seven days before retaking the permit test.

MD CDL Doubles Triples Test

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