New Hampshire Doubles and Triples Test
From the logging roads of Coos County to the notch on I-93, NH doubles and triples handle different — learn the moves that keep you safe on our hills and ice.
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NH requires a Doubles and Triples endorsement to pull more than one trailer. This practice test covers what the Concord DMV expects you to know.
Key Topics
- •Coupling and uncoupling
- •Trailer stability on hills and ice
- •Off-tracking and turning on narrow roads
About the New Hampshire Doubles and Triples Test
Topics Covered
- ✓Coupling and uncoupling procedures — NH examiners expect the full sequence, especially when you're hooking up on uneven ground at a logging yard.
- ✓Trailer stability and rollover prevention — on NH's winding two-lane roads, a double trailer can tip if you take a curve too fast. Know the limits.
- ✓Jackknife causes and recovery — ice on I-93 or sudden braking on a hill near Concord can start a jackknife. This section teaches you to avoid it.
- + 3 more topics
📘 Study Tips & State Info
Don't just memorize the steps — understand why each one matters. When the NH manual says to set the trailer brakes before coupling, picture doing that on a sloped logging landing in Pittsburg. If you skip that step, the trailer rolls away. NH examiners love asking about the sequence of coupling because it's easy to get wrong.
Pay special attention to air brake timing. In winter, your air lines can freeze if you don't drain tanks. The test will ask about that. Also, know the weight limits for doubles on NH interstate highways — they're different from some other states. The manual has a table. Learn it.
Practice the off-tracking questions. NH has a lot of tight, old roads. The test will ask how much extra room a double trailer needs compared to a single. The answer is about 10-15 more feet depending on length. That's why you see logging trucks straddling the center line on curves up north.
You take the Doubles and Triples test at any NH DMV office that offers CDL written tests. Major locations include Concord, Manchester, Nashua, and Portsmouth. You need an appointment — walk-ins aren't guaranteed for CDL tests. Call ahead or book online. The fee for the endorsement written test is $10, and you pay it when you take the test.
NH doesn't give you a separate permit for this endorsement. You just pass the written test, and it goes on your CDL. But you must already have a Class A CDL or be applying for one. The skills test for doubles/triples is separate — you bring a doubles or triples rig to the road test.
One NH quirk: you can't run doubles or triples on I-93 through Franconia Notch State Park. The tunnels and narrow lanes prohibit them. You also can't run them on most state-maintained roads unless you have a special permit. The test expects you to know these restrictions. If you're planning to haul logs in Coos County, you'll need to study the local route limits.
About the New Hampshire Doubles and Triples Test
New Hampshire's Doubles and Triples endorsement is for Class A CDL holders who need to pull more than one trailer. You'll find these rigs mostly in the logging industry up north and on long-haul routes through I-93 and I-89. The test is 20 questions, and you need 16 right to pass.
NH isn't flat. You're dealing with mountain grades on I-93 through Franconia Notch, tight ramps around Manchester, and winter conditions that can turn a double trailer into a jackknife in seconds. The test covers coupling procedures, trailer stability on curves, and how to brake without losing control on ice.
A big part of this endorsement is knowing when you can and can't run doubles in NH. Some roads restrict them — like the narrow stretch of I-93 through the Notch where tunnels and tight lanes make triples illegal. You'll need to know those restrictions cold.
NH follows the FMCSA standards for this test, but examiners here put extra weight on winter driving and securing loads for logging trailers. That's what makes this practice test different — it's built for how we drive in New Hampshire.
Topics Covered
Study Tips
Don't just memorize the steps — understand why each one matters. When the NH manual says to set the trailer brakes before coupling, picture doing that on a sloped logging landing in Pittsburg. If you skip that step, the trailer rolls away. NH examiners love asking about the sequence of coupling because it's easy to get wrong.
Pay special attention to air brake timing. In winter, your air lines can freeze if you don't drain tanks. The test will ask about that. Also, know the weight limits for doubles on NH interstate highways — they're different from some other states. The manual has a table. Learn it.
Practice the off-tracking questions. NH has a lot of tight, old roads. The test will ask how much extra room a double trailer needs compared to a single. The answer is about 10-15 more feet depending on length. That's why you see logging trucks straddling the center line on curves up north.
New Hampshire Specific Information
You take the Doubles and Triples test at any NH DMV office that offers CDL written tests. Major locations include Concord, Manchester, Nashua, and Portsmouth. You need an appointment — walk-ins aren't guaranteed for CDL tests. Call ahead or book online. The fee for the endorsement written test is $10, and you pay it when you take the test.
NH doesn't give you a separate permit for this endorsement. You just pass the written test, and it goes on your CDL. But you must already have a Class A CDL or be applying for one. The skills test for doubles/triples is separate — you bring a doubles or triples rig to the road test.
One NH quirk: you can't run doubles or triples on I-93 through Franconia Notch State Park. The tunnels and narrow lanes prohibit them. You also can't run them on most state-maintained roads unless you have a special permit. The test expects you to know these restrictions. If you're planning to haul logs in Coos County, you'll need to study the local route limits.