Kentucky CDL General Knowledge

General knowledge covers rules and concepts that apply to all commercial vehicles: safe driving, cargo securement, inspections, and basic control. Endorsement tests are separate and cover specific equipment or cargo, such as air brakes, tankers, hazardous materials, doubles and triples, or school buses. You generally take general knowledge first, then add the endorsements you need.

The Kentucky Transportation Cabinet sets the current question count and passing score, and those figures can change. Rather than trust a number from a forum or an old study app, confirm the current requirement on the Cabinet's Division of Driver Licensing site or ask your regional office when you schedule.

Kentucky administers CDL knowledge tests on a computer at licensing regional offices. You answer multiple-choice questions on screen and typically receive your result before leaving. If you are uncomfortable with computers, ask the office staff about accommodations when you make your appointment.

There is no fixed time limit you should plan around; most candidates finish well within a single office visit. Retake rules, waiting periods, and any additional fees are set by the state, so confirm the current policy with the Kentucky Transportation Cabinet or your regional office before you test.

It is not designed to trick you, but it is broad. Questions reward careful reading: many wrong answers are plausible but violate a specific rule, such as following distance, weight limits, or brake adjustment. Candidates who read the manual and practice explaining why each wrong option fails usually find it manageable.

Start with driving safely, basic control, and vehicle inspection, because those concepts reappear in other chapters. Then move to cargo securement and combination vehicles. Add air brakes if your vehicle has them, then your specific endorsement chapters. Finish by reviewing the sections on hazards, shifting, and railroad crossings before practicing questions.

Common misses include stopping distance and following distance rules, brake adjustment and low-air-pressure warnings, cargo securement limits, and inspection items that must be checked in a specific order. Another frequent error is skimming a question and choosing the first familiar-sounding answer instead of the one that matches the exact rule.

Yes for the general knowledge portion, which applies to both classes. You can skip endorsement chapters you will not use, such as doubles and triples or tankers, but do not skip cargo, inspection, or safe driving sections. Those appear on the general test regardless of vehicle class.

Bring the identification and residency documents the Cabinet requires for a CDL application, plus any current permit or license. Confirm the exact document list and whether an appointment is needed on the Cabinet's site before you go, since requirements and office procedures change.