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Pennsylvania Impairment practice

Practice 40 Pennsylvania DMV questions on impairment. Answer interactively below with an instant explanation after every question.

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Example questions & answers

1

At what blood alcohol concentration (BAC) level can a driver 21 or older be charged with a DUI in Pennsylvania?

  • A.0.02%.
  • B.0.04%.
  • C.0.08%.✓
  • D.zero.

Why: In Pennsylvania, drivers 21 or older are considered under the influence if their blood alcohol concentration (BAC) is 0.08% or higher. This limit is the legal standard for adult drivers across the state.

2

Which of the following is not a common effect of marijuana on a person's driving ability?

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

Why: Marijuana slows down the brain's processing speed, which negatively impacts essential driving skills. It does not make you react faster; instead, it significantly delays your response to hazards.

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