South Carolina CDL Practice Test 2026

Practice question bank

Sample questions

1. Applying the brake pedal causes air pressure to activate an electric switch and:

   • Turn off the brake lights.
   • Turn on the low pressure warning light.
   • Turn on the brake lights. ✓
   • Turn off the low pressure warning light.

   Vehicle Equipment & Safe Operation · Answer: C · Official handbook: Texas Commercial Driver License Handbook (DL-7C), Section 5 – Air Brakes, p. 83

2. The National Response Center must be notified of an incident resulting in any of the following, except:

   • Death.
   • Injury requiring hospitalization.
   • Injury not requiring hospitalization. ✓

   General Driving Knowledge · Answer: C · Official handbook: Texas Commercial Driver License Handbook (DL-7C), Section 9 – Hazardous Materials, p. 129

3. Roads are slippery when it first begins to rain because:

   • Water is slippery.
   • The fresh rain mixes with oil on the roadway. ✓
   • The water has nowhere to go.
   • Concrete can be slippery.

   Bad Weather & Night Driving · Answer: B · Official handbook: Texas Commercial Driver License Handbook (DL-7C), Section 2 – Driving Safely, p. 42

4. When students board a school bus, the driver should:

   • Read a book.
   • Check all mirrors. ✓
   • Only look at the students.

   Sharing the Road · Answer: B · Official handbook: Texas Commercial Driver License Handbook (DL-7C), Section 10 – School Buses, p. 138

CDL knowledge tests: compare with nearby states