Rhode Island CDL — General Knowledge practice
Rhode Island CDL — General Knowledge: Alcohol & Drugs practice test
Blood alcohol limits, zero-tolerance and implied-consent laws, and how alcohol and drugs — legal or not — affect your driving.
Content reviewed against official driver handbooks · August 12, 2026
11 questions · pass with 9 correct. You get instant feedback and an explanation after every answer.
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11 sample Alcohol & Drugs questions with the correct answer, a short explanation, and the official handbook reference. Read through them, then take the quiz above.
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1. At what BAC does the manual's effects table say coordination impairment begins?
Correct answer: .05
At .05 the table describes noticeable relaxation, reduced alertness and the beginning of coordination impairment.
Source: Rhode Island CDL Manual — Section 2: Driving Safely (Alcohol, Other Drugs, and Driving)
2. What does the manual say to pay attention to when taking legitimate drugs and medicines?
Correct answer: Warning labels and any doctor's orders about possible effects
Read the warning labels and follow your doctor's guidance about possible effects. The safest rule is not to mix drugs and driving at all.
Source: Rhode Island CDL Manual — Section 2: Driving Safely (Alcohol, Other Drugs, and Driving)
3. What does a BAC of .10 mean?
Correct answer: Alcohol makes up one-tenth of 1 percent, or 1/1000, of your blood
A BAC of .10 means alcohol makes up 1/10 of 1 percent, or one part in 1,000, of your total blood content.
Source: Rhode Island CDL Manual — Section 2: Driving Safely (Alcohol, Other Drugs, and Driving)
4. In what units does the manual say blood alcohol content is recorded?
Correct answer: Milligrams of alcohol in each 100 milliliters of blood
BAC is recorded as the milligrams of alcohol found in every 100 milliliters of blood.
Source: Rhode Island CDL Manual — Section 2: Driving Safely (Alcohol, Other Drugs, and Driving)
5. Which serious driving error does the manual connect with drinking?
Correct answer: Driving in the wrong lane
Drinking impairs judgment, vision, coordination and reaction time. The resulting errors include reacting late to hazards, going at the wrong speed, weaving, hitting the curb, and using the wrong lane.
Source: Rhode Island CDL Manual — Section 2: Driving Safely (Alcohol, Other Drugs, and Driving)
6. Which of these is NOT one of the driving effects the manual links to rising BAC?
Correct answer: Leaving extra following distance
As BAC climbs, the manual lists straddling lanes, jerky starts, not signaling or not using lights, running red lights and stop signs, and improper passing. Leaving extra following room is not among them.
Source: Rhode Island CDL Manual — Section 2: Driving Safely (Alcohol, Other Drugs, and Driving)
7. The manual compares fatigue with alcohol and drugs. What does it say all three impair?
Correct answer: Your vision and judgment
Fatigue, like alcohol and drugs, impairs vision and judgment. It also causes errors with speed and distance and slows your reaction to hazards.
Source: Rhode Island CDL Manual — Section 2: Driving Safely (Driving at Night)
8. Which drugs does the manual mention by street names such as 'pep pills,' 'uppers' and 'bennies' as prohibited for on-duty drivers?
Correct answer: Amphetamines
Laws forbid being under the influence of amphetamines, including pills called pep pills, uppers or bennies, along with narcotics and other substances that make a driver unsafe.
Source: Rhode Island CDL Manual — Section 2: Driving Safely (Alcohol, Other Drugs, and Driving)
9. On the Approximate Blood Alcohol Content chart, what label goes with zero drinks?
Correct answer: Only safe driving limit
The chart labels zero drinks as the only safe driving limit. Impairment is shown as beginning with the first drink.
Source: Rhode Island CDL Manual — Section 2: Driving Safely (Alcohol, Other Drugs, and Driving)
10. How far do the drug laws described in the manual reach for an on-duty driver?
Correct answer: They prohibit both possessing and using many drugs while on duty
The laws bar possession or use of many drugs on duty. They can reach medicines that cause drowsiness, unless a doctor tells the driver a prescribed drug won't affect safe driving.
Source: Rhode Island CDL Manual — Section 2: Driving Safely (Alcohol, Other Drugs, and Driving)
11. The manual's Approximate Blood Alcohol Content chart tells you to subtract how much for each 40 minutes of drinking?
Correct answer: .01%
The chart's figures assume no time has passed. Take off .01% for every 40 minutes spent drinking.
Source: Rhode Island CDL Manual — Section 2: Driving Safely (Alcohol, Other Drugs, and Driving)
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Every Rhode Island question is written from the official Rhode Island driver handbook and checked against its current edition. DMV Test Free is a free, independent study resource — not affiliated with any DMV or government agency. About DMV Test Free