Traditional CDL Testing Study Guide

A truck driver completing a driver's test

1. Introduction

There is a federal requirement that each state have minimum standards forthe licensing of commercial drivers.

This manual provides driver license test­ing information for drivers who wish to have a commercial driver license (CDL). This manual does NOT provide information on all the federal and state requirements needed before you can drive a commercial motor vehicle (CMV). You may have to contact your state driver licensing authority for additional information.

You must have a CDL to operate:

  • Any single vehicle with a gross vehicle weight rating (GVWR) of 26,001 pounds or more.
  • A combination vehicle with a gross combination weight rating of 26,001 or more pounds, provided the GVWR of the vehicle(s) being towed is in excess of 10,000 pounds.
  • A vehicle designed to transport 16 or more passengers (including the driver).
  • Any size vehicle which requires hazardous material placards or is carrying material listed as a select agent or toxin in 42 CFR part 73. Federal regulations through the Department of Homeland Security require a background check and fingerprinting for the Hazardous Materials endorsement. The background check can take up to six weeks. Contact the Transportation Security Administration (TSA) at https://universalenroll.dhs.gov or your local DDS Customer Service Center for more information.

To get a CDL, you must pass knowledge and skills tests. This manual will help you pass the tests. This manual is not a substitute for a truck driver training class or program. Formal training is the most reliable way to learn the many special skills required for safely driving a large commercial vehicle and becoming a professional driver in the trucking industry. Figure 1.1 helps you determine if you need a CDL.

Figure 1.1

Flowchart of Determining Class of CDL Required, long description is at end of document under heading "Long descriptions"

1.1 General qualification of drivers:

  1. Is at least 18 years old;
  2. Can read and speak the English language sufficiently to converse with the general public to understand highway traffic signs and signals in the English language, to respond to official inquiries, and to make entries on reports and records;
  3. Can, by reason of experience, training, or both, safely operate the type of commercial motor vehicle he and / or she drives;
  4. Is physically qualified to drive a commercial motor vehicle in accordance with CFR 391.41;
  5. Has a currently valid Commercial Learner's Permit (CLP) or CDL issued by only one State or jurisdiction; and
  6. Is not disqualified to drive a commercial motor vehicle.

1.2 Commercial Driver License Tests

1.2.1 Knowledge Tests

A Commercial Learner's Permit (CLP) means a permit issued to an individual, which, when carried with a valid driver's license issued by the same State or jurisdiction, authorizes the individual to operate a class of a commercial motor vehicle when accompanied by aholder of a valid CDL for purposes of behind-the-wheel training.

When issued to a CDL holder, a CLP serves as authorization for accompanied behind-the-wheel training in a commercial motor vehicle for which the holder's current CDL is not valid.

A CLP is considered a valid CDL for purposes of behind-the-wheel training on public roads or highways, if all of the following minimum conditions are met:

  • The CLP holder is at all times accompanied by the holder of a valid CDL who has the proper CDL group and endorsement(s) necessary to operate the CMV.
  • The CDL holder must at all times be physically present in the front seat of the vehicle next to the CLP holder or, in the case of a passenger vehicle, directly behind or in the first row be­ hind the driver and must have the CLP holder under observation and direct supervision.

The issuance of a CLP is a precondition to the initial issuance of a CDL. The issuance of a CLP is also a precondition to the upgrade of a CDL if the upgrade requires a skills test. The CLP holder is not eligible to take the CDL skills test in the first 14 days after initial issuance of the CLP. If you change CLP Class or add one of 3 endorsements (P-S-N) your initial issuance changes.

Each person applying for a commercial or non-commercial instructional (learner's) permit for Class A, B, C, or M driver's license shall pay the applicable license fee prior to attempting the knowledge test for the instructional (learner's) permit sought. If said person fails to achieve a passing score on the knowledge test, the license fee paid shall be considered a testing fee and retained by the department. Any person failing to achieve a passing score on the knowledge test for an instructional (learner's) permit shall pay the applicable license fee on each subsequent attempt until successful, at which time the fee shall be his or her license fee.

You will have to take one or more knowledge tests, depending on what class of license and what endorsements you need. To qualify for a license permit, a person must obtain a passing score on all knowledge tests required for that class. The CDL knowledge tests are all multiple­ choice and include:

  • The general knowledge test, taken by all applicants.
  • The passenger transport test, taken by all bus driver applicants. The passenger transport skills test must be taken and passed by all applicants in order to ob­tain this endorsement.
  • The air brakes test, which you must take if your vehicle has air brakes, including air over hydraulic brakes.
  • The combination vehicles test, which is required if you want to drive combination vehicles.
  • The hazardous materials test, required if you want to haul hazardous materials, as defined in 49 CFR 383.5. In order to obtain this endorsement you are also required to pass a Transportation Security Administration (TSA) background check (go to https://universalenroll.dhs.gov for additional information). (NOTE: This en­dorsement is not eligible to be on the CLP.)
  • The tanker test is required if you want to haul a liquid or gaseous materials in a tank or tanks having an individual rated capacity of more than 119 gallons and an aggregate rated capacity of 1,000 gal­lons or more that is either permanently or temporarily attached to the vehicle or chassis.
  • Note: Since 2/7/22 Formal Training is required before you will be able to get the TSA background check.
  • The doubles and / or triples test, required if you want to pull double or triple trailers. (NOTE: This endorsement is not eligible to be on the CLP.)
  • The School Bus test is required if you want to drive a school bus. The school bus skills test must be taken and passed by all applicants in order to obtain this endorsement.

The passing score for all knowledge test is 80%.

With the exception of adding the Passenger (P) endorsement or the School Bus (S) endorsement, a driver who already has the required license class may add the endorsement(s) after passing written tests requisite to the endorsement(s) being applied for. To obtain a Passenger (P) or School Bus (S) endorsement, the driver must pass both CDL knowledge and skills tests.

If you do not have the license class require for an endorsement but are seeking that class while also seeking the endorsement, the endorsement is only granted if the knowledge test for the endorsement is passed and all other requirements for the license class are met.

If you fail an endorsement test, but have otherwise passed the knowledge tests for the license class, you can still take the applicable skills tests. If you pass the skills tests, you should be given the appropriate license, but without the endorsement. You can then retake the endorsement test later without further skills testing except for obtaining a P or S endorsement (P and S endorsements require a skills test be performed in a bus).

Upon request the examiner will provide you with your score for each knowledge test taken. All test material is derived from the CDL Drivers Manual.

After you have passed the knowledge test(s) for a license class, you then must pass the skill tests. No class of CDL or CDL upgrade is granted solely on the basis of passing the knowledge tests. If a driver fails one or more of the knowledge tests required for a license class, you must retake and pass the failed test(s) before taking the skills tests.

The retest waiting period is:

  • 1st failure and subsequent failures - two days

Knowledge test failures also affect the retest waiting period for skills test.

Current active Duty Military, Guard and Re­serve members or military personnel that have not been out of the military more than one (1) year can apply for a Military Skills Test Waiver. Please visit the DDS website at dds.georgia.gov to download the Military Skills Test Waiver application.