North Dakota Doubles and Triples Test
From hauling grain on I-94 to oil field equipment on US-85, this test covers the maneuvers that keep you safe in North Dakota's extreme winters and wide open spaces.
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20 questions, 80% to pass, 25 minutes. North Dakota's doubles/triples test covers coupling, stability, and winter driving on our worst roads.
Key Topics
- •Coupling/uncoupling sequence
- •Converter dolly and trailer stability
- •Winter driving and jackknife prevention
About the North Dakota Doubles and Triples Test
Topics Covered
- ✓Coupling and uncoupling doubles/triples — North Dakota examiners want the exact sequence, especially when your hands are numb and the gladhands are frozen.
- ✓Converter dolly operation and safety — you'll see a lot of these on I-94 west of Bismarck hauling oil field pipe.
- ✓Trailer stability and rollover prevention — crosswinds on I-29 can push your rear trailer sideways faster than you think.
- + 3 more topics
📘 Study Tips & State Info
North Dakota's DMV examiners are practical people. They don't ask trick questions — they ask about procedures you'll use every day. Focus on the step-by-step coupling and uncoupling process. Memorize the order: inspect, connect air and electrical, raise landing gear, test, and so on. They'll ask you what to do if the trailer won't couple properly. That's a real problem when you're hooking up in a blizzard.
Pay special attention to air brake questions for doubles and triples. The test covers how the air system works with multiple trailers, especially the emergency brake system. In North Dakota, you can't afford to have a trailer break away on a highway. Know how the air loss warning system works and what to do if you lose air pressure.
Also, study the section on converter dollies. You'll need to know how to position them, how to connect them, and what happens if a dolly has a flat tire or bad brakes. That's not just book learning — it's something you'll deal with in a truck stop parking lot in Williston at 2 AM.
The North Dakota Department of Transportation (NDDOT) handles all CDL testing. You can take the written knowledge tests — General Knowledge and any endorsements — at any NDDOT driver license office. Major testing locations include Bismarck (1000 E Divide Ave), Fargo (325 38th St SW), Grand Forks (1550 24th Ave S), Minot (2200 Burdick Expy E), and Williston (3412 4th Ave W). Appointments are strongly recommended; you can schedule online at dot.nd.gov.
You'll need to present a valid Medical Examiner's Certificate (DOT physical) before you can take the skills test, but the written test doesn't require it. The fee for the doubles/triples endorsement is $5, added to your CDL application fee. If you fail, you can retake the test the same day at some offices, but call ahead to confirm. Most offices charge a $5 retest fee.
North Dakota does not have any state-specific add-on questions for the doubles/triples test beyond the federal standard. But examiners will expect you to know how to handle your combination in winter conditions. They might ask a question like 'What should you do if your trailer starts to slide on ice?' The answer comes from the CDL manual, not guesswork.
About the North Dakota Doubles and Triples Test
If you're planning to pull doubles or triples in North Dakota, you need this endorsement on your Class A CDL. We're talking about the trucks that haul grain from the Red River Valley to the elevators, or move oil field equipment across the Bakken. The test isn't just book knowledge — it's about keeping you stable when the wind blows across I-29 and the temperature drops below zero.
The North Dakota Doubles and Triples test follows the federal standard: 20 multiple-choice questions, 80% to pass. You'll take it at any NDDOT driver license office — Bismarck, Fargo, Grand Forks, Minot, Williston — after you pass the General Knowledge test. The questions focus on coupling and uncoupling procedures, converter dolly handling, and what happens to your trailers when you hit black ice on US-2.
Here's what makes North Dakota different: we've got some of the longest, straightest highways in the country, but also some of the worst winter weather. You need to know how to inspect your air lines and electrical connections when they're caked with ice. You need to understand how off-tracking changes when you're pulling two or three trailers through a snowy intersection. The test asks about that stuff because the examiners have seen it go wrong.
Don't walk in unprepared. Use this practice test to get comfortable with the question format and the kinds of scenarios you'll face. The real test is straightforward if you know the material. If you don't, you're wasting your time and money.
Topics Covered
Study Tips
North Dakota's DMV examiners are practical people. They don't ask trick questions — they ask about procedures you'll use every day. Focus on the step-by-step coupling and uncoupling process. Memorize the order: inspect, connect air and electrical, raise landing gear, test, and so on. They'll ask you what to do if the trailer won't couple properly. That's a real problem when you're hooking up in a blizzard.
Pay special attention to air brake questions for doubles and triples. The test covers how the air system works with multiple trailers, especially the emergency brake system. In North Dakota, you can't afford to have a trailer break away on a highway. Know how the air loss warning system works and what to do if you lose air pressure.
Also, study the section on converter dollies. You'll need to know how to position them, how to connect them, and what happens if a dolly has a flat tire or bad brakes. That's not just book learning — it's something you'll deal with in a truck stop parking lot in Williston at 2 AM.
North Dakota Specific Information
The North Dakota Department of Transportation (NDDOT) handles all CDL testing. You can take the written knowledge tests — General Knowledge and any endorsements — at any NDDOT driver license office. Major testing locations include Bismarck (1000 E Divide Ave), Fargo (325 38th St SW), Grand Forks (1550 24th Ave S), Minot (2200 Burdick Expy E), and Williston (3412 4th Ave W). Appointments are strongly recommended; you can schedule online at dot.nd.gov.
You'll need to present a valid Medical Examiner's Certificate (DOT physical) before you can take the skills test, but the written test doesn't require it. The fee for the doubles/triples endorsement is $5, added to your CDL application fee. If you fail, you can retake the test the same day at some offices, but call ahead to confirm. Most offices charge a $5 retest fee.
North Dakota does not have any state-specific add-on questions for the doubles/triples test beyond the federal standard. But examiners will expect you to know how to handle your combination in winter conditions. They might ask a question like 'What should you do if your trailer starts to slide on ice?' The answer comes from the CDL manual, not guesswork.