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Alaska Doubles and Triples Test

Prepare for the challenges of hauling doubles along the Parks Highway and through Alaska's mountain passes.

Questions

80%

To Pass

Minutes

93 questions · 25 min time limit · 80% to pass

Opens in a practice window — choose your mode inside.

Reviewed by Jack Mahana, CDL Instructor (13+ years)

Last verified: August 2026

All questions sourced from the official Alaska CDL handbook and FMCSA regulations.

About the Alaska Doubles and Triples Test

Alaska’s roads aren’t like anywhere else. You might haul doubles from Anchorage up to Prudhoe Bay, crossing the Arctic Circle on the Dalton Highway. That drive brings snow, ice, and limited services. You need to know your rig inside and out.

Our practice test focuses on the questions Alaska drivers see most. You’ll learn about coupling procedures for rough terrain, air brake systems on long downgrades, and weight distribution for uneven loads. No fluff — just the facts you need for the DMV test.

Alaska’s trucking industry moves everything from oil field equipment to seafood. Triples are rare here due to road conditions, but doubles are common on major routes. You’ll also face unique rules like winter chain requirements and night driving restrictions. We prepare you for all of it.

Take this test anywhere — on your phone or computer. Each question includes an explanation so you understand the “why” behind the answer. Start now and build your confidence before test day.

Topics Covered

✓Air brakes – stopping on icy grades is a must in Alaska

✓Coupling doubles – you’ll do it on uneven gravel lots

✓Weight distribution – keep your load legal on Alaska’s scales

✓Inspecting equipment – a blowout on the Glenn Highway is no joke

✓Winter driving rules – chains, lights, and reduced speeds

✓Alaska-specific endorsements – know what’s required for your route

Study Tips

Start with the Alaska CDL Handbook’s section on doubles and triples. Pay extra attention to the tables for maximum lengths and weight limits — Alaska’s numbers differ from the lower 48. Then test yourself with our practice questions to find your weak spots.

When you’re ready for the real exam, schedule your knowledge test at your local DMV. Anchorage, Fairbanks, and Juneau all offer the test. Bring your permit paperwork and pay the fee (check the DMV site for current amount). If you fail, you can retake it the next day — but we want you to pass the first time.

Don’t forget to study the air brake section too. Many Alaska CDL tests combine air brakes with doubles questions. Use our practice test to cover both at once.

Alaska Specific Information

Alaska’s DMV offices accept walk-ins, but appointments are recommended for CDL knowledge tests. You can book online through the Alaska DMV portal. Fees for the doubles/triples endorsement vary — currently around $40, but confirm on the official site.

You must pass a written knowledge test before you can take the skills test. The test covers Alaska-specific regulations, not just federal rules. For example, Alaska allows double trailers up to 75 feet overall length, but triples are only permitted on a few roads with special permits.

If you’re planning to haul oil field loads on the North Slope, you’ll also need a hazardous materials endorsement. Our practice test doesn’t cover that, but we have separate materials for it. Get your doubles endorsement first, then come back for the rest.

Frequently Asked Questions

Do I need a separate CDL endorsement to drive doubles in Alaska?

Yes. You must pass the Doubles and Triples knowledge test and add the “T” endorsement to your CDL. If you want to drive triples, you’ll need the same endorsement — but triples are almost impossible to operate legally in Alaska without a special permit.

What’s the maximum length for a double trailer combination in Alaska?

Alaska allows double trailers up to 75 feet overall length. That’s shorter than some lower 48 states, so check your trailer lengths before you hook up. Anything over requires a permit.

How do I schedule my CDL skills test in Alaska?

You schedule the skills test through a third-party tester approved by the Alaska DMV. The DMV website lists authorized testers in your area. You’ll need to bring your own truck and trailer for the test.

Can I use a CDL permit to practice driving doubles on Alaska roads?

Yes, as long as you have a qualified CDL holder with you. But remember: winter conditions and remote highways make practice essential. Don’t skip the hands-on training before your test.

What documents do I need for the doubles knowledge test in Alaska?

Bring your commercial learner’s permit (CLP), proof of identity (like a passport or birth certificate), and payment for the test fee. If you’re adding an endorsement to an existing CDL, bring your current license too.

Reviewed by Jack Mahana, CDL Instructor (13+ years)

Last verified: August 2026 · FMCSA-compliant content