Alaska CDL Practice Test 2025

The Alaska Division of Motor Vehicles (DMV), part of the Department of Administration, issues all Commercial Driver's Licenses in Alaska. CDL applicants must visit a DMV office to take knowledge tests, pass a medical examination (FMCSA DOT physical), and complete a skills test with the appropriate vehicle class. Alaska DMV offices are located in Anchorage, Fairbanks, Juneau, and other communities.

All Alaska CDL applicants must pass the General Knowledge test. Additional tests depend on the endorsements or restrictions needed: Passenger Transport, Air Brakes (if the vehicle has air brakes), Combination Vehicles (for Class A), Hazardous Materials (requires TSA security threat assessment), Tank Vehicles, Doubles/Triples, and School Bus. Each test must be passed with 80% or better. Alaska also requires CDL applicants to understand Alaska-specific conditions such as Dalton Highway operations and extreme cold weather procedures.

The FMCSA BAC limit of 0.04% applies to all CDL drivers operating a commercial motor vehicle in Alaska. This is half the standard 0.08% limit for non-commercial drivers. Additionally, Alaska prohibits CDL drivers from consuming alcohol within 4 hours of driving a CMV. A CDL driver who refuses a BAC test or tests at 0.04% or above faces immediate out-of-service placement and CDL disqualification.

Alaska CDL winter pre-trip inspections should include: verifying the block heater is functional and the engine is warm before attempting to start; checking air brake system moisture by draining air tanks and testing for freeze; inspecting air dryers and alcohol evaporators; checking tire pressure (which drops in cold weather); inspecting fuel lines and filters for diesel gel; verifying all lights function (cold can cause bulb failure); and checking that tire chains are available and functional for mountain pass routes.

The Dalton Highway (AK-11) is open to commercial vehicles and does not require a special permit beyond standard CDL and vehicle registration. However, commercial operators must be prepared for gravel surfaces on approximately 166 miles of the route, a 240-mile no-services section between Coldfoot and Deadhorse requiring extra fuel planning, and the operational reality that commercial trucks serving the Prudhoe Bay oil fields have practical priority on the road. Drivers should file a trip plan with someone who can initiate a search if they don't arrive as scheduled.

A Class A CDL allows you to operate any combination of vehicles with a Gross Vehicle Weight Rating (GVWR) of 26,001 lbs or more, provided the towed unit exceeds 10,000 lbs — this includes tractor-trailers and double/triple trailer rigs. A Class B CDL covers single vehicles with a GVWR of 26,001 lbs or more, or any such vehicle towing a unit not exceeding 10,000 lbs — this includes straight trucks and large buses. A Class C CDL is required for vehicles designed to carry 16 or more passengers (including the driver) or for vehicles transporting hazardous materials that require placarding, when those vehicles do not qualify for Class A or B.

CDL fees vary by state and by the class and endorsements you obtain. Most states charge separate fees for the CDL knowledge test ($10–$30 per attempt), the CDL skills test ($50–$150), and the CDL license itself ($50–$100). Additional fees apply for each endorsement (HazMat, Tanker, Passenger, etc.). The HazMat endorsement also requires a TSA security threat assessment fee of approximately $86. Check your Alaska DMV website for current fee schedules.

Federal regulations (49 CFR 383.133) require that CDL applicants be able to read and speak the English language sufficiently to understand highway traffic signs and signals and to respond to official inquiries. Many states offer CDL knowledge tests in Spanish and other languages for non-commercial knowledge questions, but the actual CDL test must be taken in a language that allows the driver to meet the English proficiency requirement. Check with the Alaska DMV for available language options.

In most states, a CDL is valid for 4–8 years (commonly 4–5 years). To renew your Alaska CDL, you typically need to visit a DMV office, pass a vision test, pay the renewal fee, and update your medical certification (DOT physical). If you hold a HazMat endorsement, your TSA background check must also be current. CDLs cannot generally be renewed online due to federal requirements for in-person verification of medical certification.

If you fail the CDL General Knowledge test in Alaska, you are typically required to wait a specified period (commonly 1–7 days) before retaking it. Most states allow 2–3 attempts before requiring additional waiting periods or study requirements. There is usually a retest fee for each attempt. Focus on the areas you missed — most states provide a score sheet showing which topic areas you need to review.