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South Carolina Impairment practice

Practice 50 South Carolina DMV questions on impairment. Answer interactively below with an instant explanation after every question.

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Example questions & answers

1

What is unlikely to happen to your driving ability after using marijuana?

  • A.Reduced ability to focus
  • B.Faster reaction time✓
  • C.Impaired night vision
  • D.Impaired sense of time, speed, and distance

Why: Marijuana impairs your ability to drive safely by slowing down your body's responses and cognitive functions. It does not make you react faster; instead, it significantly delays your decision-making and physical movements.

2

Which drug is the second most common substance found in drivers involved in accidents, following alcohol?

  • A.cocaine.
  • B.cold or allergy medications.
  • C.marijuana.✓
  • D.pain relievers.

Why: Marijuana is the most frequently detected drug other than alcohol in the systems of drivers involved in crashes. It significantly impairs judgment, motor coordination, and reaction time.

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Practice material only — verify current rules with the South Carolina Department of Motor Vehicles.