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South Carolina CDL Practice Test: Class B - Test 5 2018

(From the 2018 South Carolina CDL Handbook)
Number of tests: 5
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. When the safety valve releases air this indicates ___________.
  • Speed limit.

  • Railroad crossing.

  • Warning of a hazard.

  • Yield right-of-way.

2. What determines how much heat a drum can take without damage?
  • The amount of food in the stomach.

  • How much time passes between drinks.

  • The body weight of an individual.

  • All three choices.

3. What is the minimum number of days you can lose your CDL if you have committed three serious traffic violations within a three-year period involving a CMV?
  • Should drive slower than other traffic for 200 feet.

  • Should wait for the first two vehicles to pass, then drive into the lane.

  • Need a large enough gap to get up to the speed of traffic.

4. If you are using the proper braking technique and your "safe speed" is 40 mph, you would wait until your speed reaches 40 mph and then apply the brakes hard enough for you to gradually reduce your speed to _______.
  • A sign permits the turn.

  • Traffic on the street moves to the right.

  • Traffic on the street moves to the left.

5. If you renounce your United States citizenship, you will ______.
  • A 6-month probation

  • Sentence to a corrections institution

  • Points on the driving record

  • A 90-day driver license suspension and up to a $500 fine

6. Vehicles with air brakes _________.
  • Increase your following distance

  • Drive as you would on dry roads

  • Avoid crossing bridges or intersections

  • Use alternate routes