South Carolina CDL Practice Test — General Knowledge, Air Brakes & Endorsements (2026)
South Carolina's commercial driver license (CDL) program requires applicants to be at least 18 years old. CDL applicants must take written knowledge tests for general knowledge, air brakes, and any applicable endorsements such as doubles/triples, tanker vehicles, passenger vehicles, or hazardous materials. The first step is obtaining a commercial learner's permit by passing knowledge tests. Skills tests and vision tests are also required for obtaining a full CDL.
Sample South Carolina CDL Practice Test Questions & Official Manual Citations (2026)
Below are 4 real sample questions from our South Carolina cdl practice test bank. Every question in PassMyDMV cites the exact page and rule in the official South Carolina manual so you understand the law behind every answer:
Sample Question 1 · Knowledge Test Score
Official South Carolina Manual · Page 11
What score is required to pass a CDL knowledge test in South Carolina?
- A. 80% or higher Correct
- B. 75% or higher
- C. 90% or higher
- D. 70% or higher
Why A. 80% or higher is correct: South Carolina says the CDL knowledge test, whether written or oral, is passed with a score of 80% or higher. [Manual: Items you must take to the SCDMV for a CDL skills test. — Knowledge examinations, p. 11]
Manual excerpt (Official South Carolina Manual · Page 11): “The knowledge test, written or oral, may be passed with a score of 80% or higher.”
Sample Question 2 · Knowledge Test Retest
Official South Carolina Manual · Page 11
If you fail any portion of the CDL knowledge test, when may you retest?
- A. The following day Correct
- B. Immediately the same day
- C. Only after a new CLP is issued
- D. After seven calendar days
Why A. The following day is correct: A failed portion of the knowledge test requires waiting until the following day before another attempt. [Manual: Items you must take to the SCDMV for a CDL skills test. — Knowledge examinations, p. 11]
Manual excerpt (Official South Carolina Manual · Page 11): “If you fail any portion of the knowledge test, you must wait until the following day before
you may retest.”
Sample Question 3 · Application Test Attempts
Official South Carolina Manual · Page 11
How many times may you test on the original CDL application fees paid?
- A. Two times
- B. Three times Correct
- C. Five times
- D. One time
Why B. Three times is correct: The original application fee covers up to three test attempts. After a permit or license is issued, more testing requires another fee. [Manual: Items you must take to the SCDMV for a CDL skills test. — Knowledge examinations, p. 11]
Manual excerpt (Official South Carolina Manual · Page 11): “You may test three times on the original application fees paid.”
Sample Question 4 · Hazmat Test Format
Official South Carolina Manual · Page 11
In what format must the Hazardous Material Endorsement test be taken and passed?
- A. Written or automated test format only Correct
- B. Road-test format only
- C. Oral format only
- D. Vehicle inspection format only
Why A. Written or automated test format only is correct: The manual specifically limits the Hazardous Material Endorsement test to written or automated testing. [Manual: Items you must take to the SCDMV for a CDL skills test. — Knowledge examinations, p. 11]
Manual excerpt (Official South Carolina Manual · Page 11): “The Hazardous Material Endorsement test MUST be taken and passed in a written or automated test format
only.”
Most-Tested South Carolina CDL Practice Test Topics in Our 680-Question Bank
Our South Carolina cdl practice test bank contains 680 active multiple-choice questions written directly from the official South Carolina handbook. Here is how those questions break down across the core exam topics:
Frequently Asked Questions: South Carolina CDL Practice Test
All South Carolina DMV Practice Tests & Study Guides
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- Official South Carolina Driver Manual Table of Contents & PDF Handbook
- How to Get Your South Carolina Driver License: 2026 Step-by-Step Guide
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