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Nevada Impairment practice

Practice 51 Nevada DMV questions on impairment. Answer interactively below with an instant explanation after every question.

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Example questions & answers

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 is a substance that slows down the central nervous system, making it impossible to react faster. The official manual notes that it can 'greatly affect motor skills and impair a driver’s ability to think and react.'

Which drug is found most frequently in drivers involved in crashes, following alcohol?

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

Why: While alcohol remains the leading cause of impaired driving, marijuana is the second most frequently detected drug in drivers involved in crashes. Even where legal, it significantly impairs the cognitive and motor skills necessary for safe driving.

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