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South Carolina CDL Practice Test: Class B - Test 3 2019

(From the 2019 South Carolina CDL Handbook)
Number of tests: 3
Number of questions: 30
Passing score: 80

Directions: When applying for this license, applicants must pass a 50-question test. And applicants must score 80% to pass the test. The following questions are based on the details provided in the South Carolina Commercial Driver Handbook. Endorsements that may be used with a Class B CDL include Hazardous Materials, Passenger, Double and Triples, HazMat and Tanker, Air Brakes and School bus. If you need additional information, please contact your local DMV office. You can find your nearest DMV office at South Carolina DMV locations.

You have made 2 errors so far.
1. Why can drivers be at a greater risk of an accident when they drive at night?
  • Driving slowly is always safer

  • The speed limit is always a safe speed

  • The safe speed to drive depends on many conditions

  • Accelerating is always dangerous

2. If you are transporting any amount of hazardous materials, you must _____.
  • On the main road, just before the exit lane

  • When you first see the exit sign

  • Once you have moved into the exit lane

  • Once you see the toll booth

3. Vehicles with air brakes _________.
  • Use alternate routes

  • Avoid crossing bridges or intersections

  • Drive as you would on dry roads

  • Increase your following distance

4. If you have committed two violations of an "out-of-service order" in a ten-year period, you will likely lose your CDL for what amount of time?
  • Use your emergency lights

  • Wave your arms

  • Sound your horn

  • Flash your headlights

5. Tires should be replaced ________.
  • Helped by another person.

  • Wearing light-colored clothing.

  • Led by a guide dog, or using a white or metallic cane.

  • Wearing dark-colored glasses.

6. If you have committed three serious traffic violations within a three-year period involving a CMV, you will likely lose your CDL at least _______ days.
  • Any lane

  • The left lane

  • The middle of the intersection

  • The right lane