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Drinking, Drugs, and Health — New Jersey Driver's License Practice Test

Drinking, Drugs, and HealthQuestion 1 of 23

23 questions in this topic · 23 drawn at random this round

Why is good side (peripheral) vision important for safe driving?

New Jersey Driver Manual

All questions are based on the official New Jersey Driver Manual (NJ MVC). Study the relevant chapter to reinforce your knowledge.

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This New Jersey Driver's License Drinking, Drugs, and Health practice set has 23 practice questions based on the official exam materials, each with an instant explanation. You need 80% on the real New Jersey Driver's License knowledge test to pass.

Topic overview

This chapter covers how alcohol and drugs impair driving, and the health factors — vision, hearing, and overall fitness — that affect safe driving. Alcohol slows reaction time, coordination, and the ability to judge distance, and even small amounts increase crash risk; only time removes alcohol from the body, so "sobering up" tricks like coffee or food don't work.

The most heavily tested material is the legal BAC (blood alcohol concentration) threshold: 0.08% for drivers 21 and older, and a much stricter 0.01% for drivers under 21. Refusing a breath test is itself illegal in New Jersey and carries its own penalties. The chapter also explains marijuana's effects on tracking, distance judgment, and divided attention, and reminds drivers that mixing alcohol with any drug — prescription or over-the-counter — is dangerous.

A common mistake is assuming that feeling "fine" or being under the legal limit means driving is unaffected — the manual stresses that alcohol impairs judgment starting well below 0.08%, and that food only slows (not prevents) a high BAC. Good hosts should stop serving alcohol before a party ends and never let an impaired guest drive.

What is the legal BAC limit for driving in New Jersey?

0.08% or higher for drivers 21 and older; for drivers under 21, any BAC of 0.01% or higher is illegal.

Does eating food before drinking prevent a high BAC?

No — food only slows how quickly alcohol enters the bloodstream. Heavy drinking will still produce a high BAC even with food.

How does marijuana affect driving ability?

It can reduce lane-tracking ability, impair distance judgment, reduce vigilance, and make it harder to divide attention among traffic, road, and weather conditions.

Written from the official New Jersey Driver Manual — Drinking, Drugs, and Health ↗· Last checked: 2026-07-10· Reviewed by the PassPrep editorial team· How we verify →

Sample questions

Three questions from the Drinking, Drugs, and Health bank with the correct answer and an explanation. The practice quiz above draws 23 questions at random from the same bank.

  1. What is true about alcohol and its effect on driving ability?

    • It is a drug that affects driving ability and can make a motorist overconfident — Correct answer
    • It improves reaction time when consumed in small amounts
    • It has no effect as long as you stay below the legal limit
    • It only affects driving if mixed with other drugs

    Explanation: Alcohol is a drug that affects overall driving ability and may make a motorist overconfident and unable to think clearly.

    Handbook: Drinking, Drugs, and Health — Effects of Alcohol

  2. After two, three, or four drinks, what does alcohol begin to impair?

    • Reaction time, coordination, balance, vision, and distance judgment — Correct answer
    • Only the sense of smell
    • Hearing but not vision
    • Nothing measurable until the seventh drink

    Explanation: After two, three, or four drinks, alcohol begins to impair reaction time, coordination, and balance, and affects vision and the ability to judge distance.

    Handbook: Drinking, Drugs, and Health — Effects of Alcohol

  3. What is the only thing that can make an intoxicated person sober?

    • Time — Correct answer
    • Drinking black coffee
    • Taking a cold shower
    • Eating a large meal

    Explanation: Only time can make a person sober; about 90% of the alcohol is oxidized by the liver and 10% is eliminated in breath, urine, and sweat.

    Handbook: Drinking, Drugs, and Health — Effects of Alcohol