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CDL Permit Test Texas
What to Study, How to Pass

The CDL permit (CLP) is your first step before driving in school. Here's exactly what's on it, which sections you need, and how to pass first try.

Best for first-time Class A and Class B applicants getting ready for the CLP before CDL school.

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Home › Resources › CDL Permit Test Texas Guide

Quick Answer: Texas CDL Permit Test (CLP)

  • The CDL permit test is taken at a Texas DPS driver license office before you begin behind-the-wheel training. Most schools require or strongly prefer that you have your CLP before in-truck instruction begins.
  • The General Knowledge section (50 questions, 80% to pass) is required for all CDL applicants. Additional sections depend on your CDL class and endorsements.
  • Class A applicants typically also take Air Brakes and Combination Vehicles. Class B applicants typically take General Knowledge and, if applicable, Air Brakes.
  • The Texas Commercial Motor Vehicle Driver Handbook is the official study source — all test questions come from it.
  • The CLP is generally valid for 180 days. Under FMCSA rules, you must hold the CLP for at least 14 days before taking the CDL skills test.
  • Most CDL schools help you prepare for the permit test and assist with scheduling your DPS appointment.
Know Before You Study

Which Tests Do You Need? Class A vs Class B vs Endorsements

Not everyone takes the same permit test sections. Which tests you need depends on your CDL class goal and which endorsements you want. Review the Class A vs Class B CDL guide if you're not sure which path fits your goals.

Class A CDL

  • General Knowledge (required)
  • Combination Vehicles (required)
  • Air Brakes (required if vehicle uses air brakes — most Class A trucks do)
  • Plus any endorsement tests you want (Hazmat, Tanker, etc.)

Class B CDL

  • General Knowledge (required)
  • Air Brakes (required if vehicle uses air brakes)
  • Passenger (required for bus/transit drivers)
  • School Bus (required for school bus drivers)

Endorsements (Optional)

  • Hazmat (H) — 30 questions + TSA background check
  • Tanker (N) — 20 questions
  • Combination Tanker/Hazmat (X)
  • Doubles/Triples (T) — 20 questions
  • Passenger (P) — 20 questions

Not sure which class you need? Class A qualifies you for the most CDL jobs in Texas — semi-trucks, tankers, and oilfield routes. Class B is faster and covers buses, delivery trucks, and city routes. See the full comparison: Class A vs Class B CDL →

What's on the Test

CDL Permit Test Sections Explained

The Texas Commercial Motor Vehicle Driver Handbook is the official study source and covers what you'll be tested on. Start here — it's available free from Texas DPS.

Required — All CDL

General Knowledge

50 questions. Covers traffic laws, road signs, vehicle inspection, cargo safety, HazMat basics, and federal trucking regulations. Must score 80% (40 correct) to pass. This is the foundation — study it most.

Required — Class A & Most Class B

Air Brakes

25 questions. Covers air brake system components, inspection, and safe operation. If your vehicle uses air brakes, you must pass this section. Passing it prevents an air-brake restriction from appearing on your CLP and CDL — that restriction would limit which vehicles you can practice in and legally operate.

Required — Class A

Combination Vehicles

20 questions. Covers coupling and uncoupling trailers, air brakes on combination vehicles, and tractor-trailer handling. Required for Class A CDL applicants.

Optional — Endorsement

Hazardous Materials (H)

30 questions on HazMat regulations, placarding, and safe transport. Also requires a TSA background check and fingerprinting — a separate process from the written test. Needed for oilfield, chemical, and tanker routes.

Optional — Endorsement

Tank Vehicles (N)

20 questions on tank vehicle handling, liquid surge, tank inspections, and special driving considerations. Important for petroleum, oilfield, and liquid freight drivers. See CDL endorsements explained.

Optional — Endorsement

Passenger Vehicles (P)

20 questions on safely transporting passengers, emergency procedures, and pre-trip inspection for passenger-carrying vehicles. Required for bus and transit drivers.

How to Pass First Try

Study Tips — Pass the CDL Permit Test First Try

Most people who fail studied from the wrong source or skipped sections they needed. Here's how to avoid both mistakes.

  • 1
    Use the Texas CDL Handbook — nothing else. The official Texas Commercial Motor Vehicle Driver Handbook is available for free from Texas DPS. Every question on the test comes from this document. Generic CDL study sites may cover different rules or outdated information. Start here.
  • 2
    Take practice tests repeatedly — using Texas-focused material. Use Texas-focused CDL practice tests that mirror the General Knowledge, Air Brakes, and Combination Vehicles sections so the format feels familiar on test day. Generic national apps vary in accuracy. Take Texas-specific tests until you're consistently scoring 85–90% before scheduling your actual test. Practice tests also reveal which sections you haven't fully learned yet.
  • 3
    Study all required sections — don't skip Air Brakes. Many Class A applicants underestimate the Air Brakes section. Skipping it means an air-brake restriction appears on your CLP and CDL, limiting which trucks you can practice in and operate. Study it thoroughly even if it feels technical. The full CDL process guide covers how endorsements and restrictions affect your license.
  • 4
    Know the section count for each test you're taking. General Knowledge is 50 questions at 80% (40 correct). Air Brakes is 25 questions. Combination Vehicles is 20. Endorsement tests vary. Knowing the exact pass threshold helps you set realistic practice targets.
  • 5
    Let your CDL school help you prep. Most Texas CDL programs build permit test preparation into their curriculum. They know exactly what's tested and can point you to the right study materials. If you've enrolled, ask your school for their permit test prep resources.
  • 6
    Schedule your DPS appointment early. Texas DPS driver license offices operate by appointment. Schedule your CDL permit test appointment through the Texas DPS driver license appointment system as soon as you're ready — offices can be booked out by a week or more in busy metros.

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Most CDL schools help you prepare for the permit test and schedule your DPS appointment as part of their program. Get matched with a Texas school that fits your schedule and goals.

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Step by Step

How to Get Your Texas CLP

  • 1
    Confirm you meet basic eligibility. You need a valid Texas driver's license, must be at least 18 (21 for interstate driving), and must have no active CDL disqualifications. Review Texas CDL requirements for the full list, or see what disqualifies you from a CDL in Texas if you have concerns about your driving record or background.
  • 2
    Study the Texas CDL Handbook. Download or request the Texas Commercial Motor Vehicle Driver Handbook from Texas DPS. Read the chapters matching your CDL class goal. Take practice tests until you're consistently above 85%.
  • 3
    Schedule your DPS appointment. Book your appointment at a Texas DPS driver license office through the Texas DPS appointment system online. Bring your current driver's license, applicable fees, and any required identification or residency documents as listed on the Texas DPS website.
  • 4
    Pass the written knowledge tests. Score 80% or higher on each required section. Your CLP is issued at the office once you pass. It is generally valid for 180 days under federal CLP standards.
  • 5
    Hold your CLP for at least 14 days. Federal FMCSA rules require you to hold the CLP for a minimum of 14 days before you can take the CDL skills test. Most school programs are structured around this timeline.

What to bring to your DPS appointment:

Valid Texas driver's license
Proof of identity and residency if required
DOT medical certificate (if obtained)
Appointment confirmation
Payment for applicable fees
Social Security card or proof of SSN

Document requirements may change. Confirm current requirements on the Texas DPS website before your appointment.

Know What to Expect

What the Permit Test Is Like on Test Day

Most people who prepare well still feel nervous on test day because they don't know what to expect at the office. Here's how it typically goes.

At the DPS Office

Arrive early with your appointment confirmation, valid Texas driver's license, and any required documents. Check in at the counter. You will be directed to a testing area — most Texas DPS offices use computer terminals for CDL knowledge testing. You will only test on the sections applicable to your CDL class and desired endorsements.

During the Test

Questions are multiple choice. You can typically flag questions to revisit before submitting a section. Results are given immediately on screen after each section. If you pass all required sections, your CLP is processed the same visit. If you fail a section, Texas DPS will inform you of next steps including when you can retest.

Tip: Take each required section one at a time. Focus on finishing strong on General Knowledge first — it is the longest and most important section. Air Brakes and Combination Vehicles are shorter but require their own preparation. If you're unsure whether you need a specific section, ask your CDL school before your appointment.

Avoid These

Most Common Reasons People Fail the Permit Test

Studying the Wrong Source

Generic CDL study sites and apps vary in quality and may cover rules from other states. The only authoritative source for Texas is the Texas Commercial Motor Vehicle Driver Handbook. Everything else should be secondary.

Skipping Air Brakes or Combination Vehicles

Class A applicants sometimes skip these sections and then discover they need them before driving. The Air Brakes restriction on your CLP limits which trucks you can practice in. Study all required sections before your DPS appointment.

Showing Up Without Booking an Appointment

Texas DPS driver license offices generally require appointments for CDL testing. Walk-ins may not be accommodated. Book your appointment through the Texas DPS system in advance — especially in high-demand metros like Houston and Dallas.

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Common Questions

CDL Permit Test — FAQ

The General Knowledge section has 50 questions and requires 80% to pass (40 correct). Air Brakes has 25 questions. Combination Vehicles has 20. Endorsement sections vary (Hazmat: 30, Tanker: 20, Passenger: 20, Doubles/Triples: 20). You take only the sections required for your CDL class and desired endorsements.
The Commercial Learner's Permit is generally valid for 180 days under federal CLP standards. Under FMCSA rules, you must hold the CLP for at least 14 days before you can take the CDL skills test. Confirm current CLP validity details with Texas DPS at your appointment.
No. The official Texas CDL permit test (CLP application) must be taken in person at a Texas DPS driver license office. You can schedule your appointment through the Texas DPS appointment system online, but the test itself is administered at the office.
If you fail a section, Texas DPS will inform you of next steps, including when you can retest and any applicable fees. Use your failed sections as your study guide — they tell you exactly where your knowledge gaps are. Most people who fail and study the right way pass on the next attempt.
Yes. Most Texas CDL schools include permit test preparation as part of their program. Many also help students schedule their DPS appointments and confirm which sections they need. Some programs require you to have your CLP before behind-the-wheel training begins — ask your school about their specific process when you enroll.
Texas DPS and FMCSA rules govern when medical certification is required in the CDL process. Many schools want students to complete a current DOT medical exam before or during the permit process so there are no delays when behind-the-wheel training begins. Exact timing can vary by school and current DPS requirements, so confirm both before your appointment. Review Texas CDL requirements for an overview of the full process.

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CDL Requirements Texas How to Get a CDL in Texas Class A vs Class B CDL CDL Endorsements Explained What CDL School Is Like How Long CDL Training Takes CDL Training Cost Texas CDL Training Near Me GI Bill & Financing CDL Disqualifications Texas
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