CDL A Prep: Tests & Pre-Trip

Practice CDL knowledge, rehearse pre-trip inspection phrases and explore low-speed trailer control. CDL A Prep works offline, with no account or subscription.

QUESTIONS IN ENGLISH AND SPANISH
Study 597 questions in each language across eight topics: General Knowledge, Air Brakes, Combination Vehicles, Hazardous Materials, Tank Vehicles, Doubles & Triples, Passenger and School Bus.

Choose all questions or one topic. Practice repeats the full selected pool in shuffled rounds until you stop, with correct-answer feedback after each answer. Take a mixed 20-question mock exam, review correct answers at the end, revisit mistakes and save questions for later.

PRE-TRIP PRACTICE
Study 46 inspection cards in five sections. Learning shows the inspection text. Practice shows an unlabelled photo or diagram for recall. Swipe between cards, choose a section and switch modes without losing your place.

Learning follows the CDLBOOKCLUB walkthrough, with introductions, filler and false starts removed. Vehicle reference notes are separate. Photo galleries, source notes and six numerical checks with explanations are available from More.

Question banks are in English and Spanish. Pre-trip text and app controls are in English.

YARD PRACTICE
Explore a day cab and 28-foot semitrailer with an onscreen steering wheel, separate brake and accelerator pedals, parking brake and forward/reverse controls.

Use free practice or four exercises: Forward Stop, Straight-Line Backing, Forward Offset Tracking and Reverse Offset Backing. Switch between follow and whole-yard views, inspect axle trails, adjust vehicle and surface settings, and review boundary contacts, pull-ups and completed maneuver results.

LOCAL PROGRESS
Questions, cards and yard practice are available offline. Answer history, saved questions, card ratings and yard results stay on your device. Reset study progress whenever you choose. There is no publisher-operated study-data synchronization. External reference and support links require an internet connection.

INDEPENDENT STUDY AID
CDL A Prep is not affiliated with, endorsed by or issued by FMCSA, the U.S. Department of Transportation, any DMV/MVA or any government or licensing agency. Practice questions are study material, not an official government examination bank. Content does not guarantee current exam coverage or a passing result.

Verify current rules with your state licensing agency and instructor, and check inspection procedures on your actual vehicle. The yard is an educational approximation, not a substitute for qualified instruction, required Entry-Level Driver Training or real vehicle practice. It does not include mirror views or a complete official test procedure. Practice metrics do not certify exam readiness. Never use the app while driving or operating a vehicle.

OFFICIAL REQUIREMENTS AND MANUALS
FMCSA CDL information:
https://www.fmcsa.dot.gov/registration/commercial-drivers-license/drivers

Use your own state's current CDL manual. The Maryland CDL Manual (DL-151) is an inspection and yard reference used in this app:
https://mva.maryland.gov/media/203

Official Maryland CDL information:
https://mva.maryland.gov/licenses-ids/commercial-drivers-license-cdl