CDL Endorsements Bundle (Air Brakes, Combination Vehicles, Tanker) — 49 CFR Part 383
Air Brakes, Combination Vehicles, and Tanker endorsement knowledge-test prep in one bundle — real 25/20/20-question section formats, 80%+ federal passing standard (49 CFR 383.135) — the three written sections most Class A CDL applicants need beyond the basic General Knowledge test.
One-time purchase · lifetime access · study on any device
Permit knowledge test + endorsements, together, plus a free bonus mock exam for each.
Everything included — in full detail
This is exactly what you unlock. No vague promises — real numbers, straight from the portal.
Your full practice pool — 350 questions total, written to mirror the real exam blueprint, with full answer explanations for every question.
Including Air Brakes, Combination Vehicles, Tank Vehicles (Tanker Endorsement).
A complete, realistic exam-day simulation with the same question count and time limit as the real thing.
Covering every key term, concept, and framework you're expected to know.
Hand-picked walkthroughs and explainers organized by topic.
Visual breakdowns of the frameworks and models the exam tests you on.
The exact formulas and calculations you need, ready to review before test day.
A searchable glossary so unfamiliar terminology never slows you down.
Real field-reference and career reading picked for this profession — never more exam-prep.
See your accuracy by domain, spot weak areas early, and follow a built-in study schedule.
Study anywhere — your progress syncs on the device you are using and picks up where you left off.
No subscriptions, no renewals — buy once and keep studying until you pass.
See the CDL Endorsements Bundle portal
Real screenshots — this is exactly what you'll be studying in. Click to zoom in.
How would you like to start?
Try before you buy, or jump straight into full access.
Topics you'll drill
3 core topics pulled straight from the real question bank.
- Air Brakes
- Combination Vehicles
- Tank Vehicles (Tanker Endorsement)
CDL Endorsements Bundle exam requirements & cost
Straight from the certifying body — separate from what we charge for the study portal.
This portal covers three of the written knowledge tests a Class A CDL applicant most commonly needs beyond the base General Knowledge test: Air Brakes, Combination Vehicles, and the Tanker endorsement. All three are administered by the same state DMV/DPS that issues the CDL permit itself, under federal minimum standards set by FMCSA in 49 CFR Part 383 — there's no separate national eligibility requirement beyond already holding (or actively applying for) a Class A CDL permit, and no separate national fee schedule, since each state sets its own permit/testing fee structure. Air Brakes is required for anyone operating a vehicle equipped with air brakes (the large majority of Class A combination vehicles) and is tested with 25 questions; Combination Vehicles, required for anyone pulling a trailer, is tested with 20 questions; the Tanker endorsement, required to haul liquid or gaseous cargo in a tank vehicle, is also tested with 20 questions. Each section is scored independently — a driver who fails one doesn't need to retake a section already passed — and the federal minimum passing standard for every CDL knowledge test is at least 80% correct (49 CFR 383.135). Retake wait periods and any retest fees are set at the state level, not federally, so they vary by DMV/DPS.
Real pass rate, retake policy, scoring, and a study timeline for CDL Endorsements Bundle — free, no purchase required.
Common questions
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