Guides
Plain English help for your CDL permit test
Straight answers first, then the detail. Each guide ends with a free practice test and the Diagnostic.
Oct 7, 2026
CDL Air Brakes Test: What It Covers and the Numbers
The CDL air brakes test covers air brake parts, inspection and use. Learn who needs it and the exact psi and leakage numbers to memorize.
Oct 7, 2026
CDL Combination Vehicles Test: What's on It
What the CDL combination vehicles test covers, who needs it, and the rollover, skid, air brake and coupling points to study.
Oct 7, 2026
CDL English Proficiency Rules 2026: What to Know
Truck drivers who fail a roadside English check can be put out of service. Here is what the rule says and how to prepare as a CDL applicant.
Oct 7, 2026
CDL General Knowledge Test: Topics and Numbers to Know
The CDL general knowledge test is taken by every applicant. See what the manual covers and the stopping, following and cargo numbers drivers miss.
Oct 7, 2026
CDL Hazmat Test: What's on the H Endorsement Exam
The CDL hazmat test covers hazard classes, shipping papers, placards, loading, parking and emergencies. Here is what to study and the numbers drivers miss.
Oct 7, 2026
CDL Permit Cost by State (2026): Fees for 21 States
CDL permit cost by state: CLP fees run from $3 in Virginia to a $125 test receipt in New Jersey. See fees, retest rules and extra costs for 21 states.
Oct 7, 2026
CDL Permit to License: Every Step in Order (2026)
The path from CDL permit to license: medical card, written tests, CLP, entry-level training, the 14-day wait and the skills test.
Oct 7, 2026
CDL Tanker Endorsement Test: Who Needs It, What It Covers
The CDL tanker endorsement (N) is for tanks over 119 gallons each and 1,000 gallons or more total. Learn what the test covers and the facts drivers miss.
Oct 7, 2026
How Many Questions Are on the CDL Test? (2026)
The CDL General Knowledge test has 50 questions and you need 40 right. See every test, its question count and its passing score.
Oct 7, 2026
Is the CDL Written Test Hard? What Trips Drivers Up
The CDL written test is passable if you study the right topics. See the sections that cause the most trouble and how to prepare for each.
Oct 7, 2026
Pass the CDL Permit Test First Try: 7-Day Plan
A day-by-day plan to pass your CDL permit test the first time, with 30 to 45 minutes of study a day. Built from the official CDL manual.
Oct 7, 2026
Ready for the CDL Permit Test? A 9-Point Checklist
Know when to book your CDL permit test. Use the 90% rule, the pass mark formula and a 9-point checklist for every test you need, including Air Brakes.
Oct 7, 2026
School Bus Endorsement Test: What It Covers and the Numbers
The school bus endorsement test covers danger zones, mirrors, loading, evacuation and railroad crossings. See who needs it and the numbers to learn.
Oct 7, 2026
Which CDL Tests Do I Need? Class A, B, C Explained
Find which CDL written tests you need for Class A, B or C and each endorsement, in under 2 minutes.