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Idaho CDL Practice Tests - All Endorsements

Get your CDL without the stress. Practice every endorsement with short topic sessions and track your progress. Start free, upgrade anytime.
Most learners feel ready in ~3–6 hours of focused sessions.
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Official sample Idaho driver license
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What's your CDL goal?

Pick your path - it shows exactly which knowledge tests you need, in order.

Getting my first CDL
Class A - tractor-trailers 1. General Knowledge → 2. Combination Vehicles → 3. Air Brakes → 4. Pre-Trip Class B - large trucks & buses 1. General Knowledge → 2. Air Brakes → 3. Pre-Trip Class C - vans & small trucks General Knowledge + the endorsement your job needs (Passenger or HazMat)
I have a CDL - adding an endorsement
H HazMat N Tanker P Passenger S School Bus T Doubles/Triples

School Bus (S) requires the Passenger (P) endorsement first. Air Brakes is needed whenever your vehicle has them - skipping it adds a restriction to your license.

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Knowledge Tests - see which your class needs above

Endorsements

Full CDL Exam Simulators

Idaho CDL Class A Practice Exam 2026 Pro

Idaho CDL Class A Practice Exam 2026

474 questions
Idaho CDL Class B Practice Exam 2026 Pro

Idaho CDL Class B Practice Exam 2026

366 questions
Extra prep · printable PDF

CDL General Knowledge Cheat Sheet

The 64 highest-yield questions with answers and one-line logic, the walk-in document checklist, and the must-know signs - on paper, for the night before and the parking lot.

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Idaho CDL Commercial Driver's Handbook (2026)

To boost your chances, the FMCSA recommends studying the official CDL handbook. Cover each endorsement once and go into exam day confident.
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To boost your chances, the Idaho DMV recommends reading the official handbook. Just one read can give you a solid grasp of the essentials.
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Idaho DMV Test FAQ

In most states you can get a CDL at 18 for driving within your state (intrastate). You must be 21 to drive across state lines, carry passengers, or haul hazardous materials. Check your state's CDL manual for exact rules.

Yes. You first pass the knowledge tests to get a Commercial Learner's Permit (CLP), practice with a CDL holder in the vehicle, and in most states must hold the CLP at least 14 days before taking the skills test.

Everyone takes General Knowledge. Class A adds Combination Vehicles, and Air Brakes if your vehicle has them. Class B adds Air Brakes. Endorsements (HazMat, Tanker, Passenger, School Bus, Doubles/Triples) each add their own test - see the path picker at the top of this page.

Typically 50 questions, and most states require 80% to pass. Endorsement tests are shorter (usually 20-30 questions, same 80% bar). Your state's CDL manual lists the exact numbers.

Yes - a TSA security threat assessment (fingerprints and background check), and the endorsement must be renewed periodically. Start the TSA step early; it can take several weeks.

No. We are exam prep only: our practice tests get you ready for the state knowledge tests. Entry-Level Driver Training (ELDT) for first-time Class A/B applicants must be completed with an FMCSA-registered training provider.

Idaho CDL Practice Test Guide: General Knowledge & Endorsements

Ready to earn your commercial license in the Gem State? Pick any of the free practice tests above and start where you feel weakest. Every one of them mirrors the same written exam Idaho drivers actually sit for, so the reps you put in here carry straight into the testing room.

The written portion is the CDL General Knowledge test: 50 questions, and you need 80 percent, meaning 40 correct out of 50, to pass. That threshold is a federal FMCSA standard, so it is identical in every state. Passing it is what earns you the Commercial Learner’s Permit, which is why an Idaho CDL practice test and a General Knowledge practice test are one and the same thing. Whether you are chasing a Class A, B, or C license, you all take this exact written test first. The class itself is settled later by the vehicle you drive and the skills test you pass, not by the questions you answer here.

Idaho puts real weight on the topics you will study. Vehicle inspection, basic vehicle control, shifting, managing space and speed, spotting hazards, and handling emergencies all show up, and they matter the moment you leave the yard. If you plan to haul potatoes, dairy loads, produce, or timber out of the backcountry, you will spend serious time on grades along I-84 and I-15, where controlling your speed on a long downhill and knowing your safe braking method is the difference between a routine run and a runaway. Agricultural and logging work also pushes many Idaho drivers toward endorsements like Air Brakes, Combination Vehicles, and Tanker, each of which is a separate knowledge test with its own focus.

Use the official Idaho Commercial Driver’s License Manual as your backbone and treat these tests as your check on how well it stuck. Read a section, take a sample CDL exam over it, then go back and fix whatever you fumbled. That loop beats rereading the same pages hoping they sink in.

When your General Knowledge score is steady and any endorsement tests you need are solid, schedule your CDL skills test with the Idaho Transportation Department. Show up knowing your material and the permit is yours.

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