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New Hampshire Impairment practice

Practice 60 New Hampshire 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 is it illegal for a driver 21 years of age or older to operate a vehicle?

  • A.0.02%.
  • B.0.05%.
  • C.0.08%.✓
  • D.none of the above.

Why: For drivers 21 years of age or older, the legal limit for blood alcohol concentration (BAC) is 0.08%. Operating a vehicle at or above this level is considered driving while intoxicated.

2

Which of the following is not a typical 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 is an impairing drug that negatively affects the cognitive and motor skills required for safe driving. According to the manual, drugs like marijuana slow down a driver's ability to process information and respond to the road.

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Practice material only — verify current rules with the New Hampshire Division of Motor Vehicles.