This free test has 28 new questions on alcohol, drugs and driving in California: BAC limits, medicines and cannabis, chemical tests, open containers, rules for drivers under 21, and what happens after a DUI arrest or conviction. You need 23 correct (80%) to pass, and every answer links to Section 9 of the California Driver’s Handbook.
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Answer: Tolerance drops, which raises the risk of alcohol-related driving problems. Your ability to handle alcohol goes down as you get older. That makes alcohol-related driving problems more likely, not less.
Source: Section 9: Alcohol and Drugs — Introduction — California Driver's Handbook (web edition), California DMV
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Answer: It is illegal, because too much alcohol in any form counts, even in medicine. The law forbids driving after drinking excessive alcohol in any form. The handbook names cough syrup as an example of a medicine that can contain alcohol.
Source: Section 9: Alcohol and Drugs — Introduction — California Driver's Handbook (web edition), California DMV
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Answer: No, any mix of alcohol and drugs that lowers your driving ability is illegal. It is illegal to drive after using any combination of alcohol and drugs that reduces your ability to drive safely, even if each one alone would not.
Source: Section 9: Alcohol and Drugs — Introduction — California Driver's Handbook (web edition), California DMV
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Answer: Read the medicine's label and learn how the drug may affect you. The handbook tells drivers to read medication labels and understand the effects of any drug they use, since prescription and over-the-counter drugs can both impair driving.
Source: Section 9: Alcohol and Drugs — Introduction — California Driver's Handbook (web edition), California DMV
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Answer: One year. Refusing the requested test leads DMV to take away your driving privilege, by suspension or revocation, for one year.
Source: Section 9: Alcohol and Drugs — Introduction — California Driver's Handbook (web edition), California DMV
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Answer: No, drinking alcohol in a vehicle is illegal for passengers as well. California law bans drinking any alcohol while driving or while riding as a passenger in a vehicle. The bus, taxi, camper, and motorhome exception does not cover a private car.
Source: Section 9: Alcohol and Drugs — Use or Possession of Alcohol or Cannabis Products in a Vehicle — California Driver's Handbook (web edition), California DMV
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Answer: Eating a cannabis edible while you drive. Consuming cannabis, whether smoked or eaten, is against the law while you drive or ride in a vehicle. Sealed products, or opened ones kept in the trunk, may be carried.
Source: Section 9: Alcohol and Drugs — Use or Possession of Alcohol or Cannabis Products in a Vehicle — California Driver's Handbook (web edition), California DMV
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Answer: The amount of alcohol in your blood. When you drink, alcohol enters your bloodstream, and BAC is the measure of how much alcohol is in it.
Source: Section 9: Alcohol and Drugs — Blood Alcohol Concentration (BAC) Limits — California Driver's Handbook (web edition), California DMV
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Answer: 0.04%. Anyone driving a vehicle that needs a commercial driver's license may not drive with a BAC of 0.04% or more, a lower limit than the 0.08% for other adult drivers.
Source: Section 9: Alcohol and Drugs — Blood Alcohol Concentration (BAC) Limits — California Driver's Handbook (web edition), California DMV
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Answer: You may still be impaired; almost everyone feels alcohol's effects below the limit. A BAC under the legal limit does not make driving safe. Nearly everyone is affected by alcohol even at levels lower than the limit.
Source: Section 9: Alcohol and Drugs — Blood Alcohol Concentration (BAC) Limits — California Driver's Handbook (web edition), California DMV
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Answer: Yes, depending on how impaired the driver is, a conviction is possible. A BAC reading is not required for a DUI. Based on how impaired you are, you can be arrested and convicted without one.
Source: Section 9: Alcohol and Drugs — Blood Alcohol Concentration (BAC) Limits — California Driver's Handbook (web edition), California DMV
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Answer: Number of drinks, gender, and body weight. The handbook's BAC chart estimates a person's BAC from how many drinks they had, their gender, and their body weight.
Source: Section 9: Alcohol and Drugs — Blood Alcohol Concentration (BAC) Limits — California Driver's Handbook (web edition), California DMV
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Answer: Yes, it is illegal to drink or use drugs while operating either one. Drinking alcohol or taking drugs is illegal while operating a boat, jet ski, water skis, an aquaplane, or similar vessels, not just cars.
Source: Section 9: Alcohol and Drugs — Blood Alcohol Concentration (BAC) Limits — California Driver's Handbook (web edition), California DMV
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Answer: By driving in California, you have already consented. Driving in California counts as agreeing to a breath, blood, or urine test whenever an officer suspects you of DUI.
Source: Section 9: Alcohol and Drugs — DUI Arrests — California Driver's Handbook (web edition), California DMV
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Answer: Suspend your driving privilege. Under the Administrative Per Se law, a DUI arrest alone means DMV must suspend your driving privilege; it does not wait for a conviction.
Source: Section 9: Alcohol and Drugs — DUI Arrests — California Driver's Handbook (web edition), California DMV
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Answer: Complete a DUI program. Along with losing their driving privilege, anyone convicted of DUI is required to finish a DUI program.
Source: Section 9: Alcohol and Drugs — DUI Convictions — California Driver's Handbook (web edition), California DMV
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Answer: An insurance proof certificate (SR 22/SR 1P). A DUI conviction requires you to file proof of insurance using the SR 22/SR 1P certificate. The SR 1 form is for reporting collisions, not for this.
Source: Section 9: Alcohol and Drugs — DUI Convictions — California Driver's Handbook (web edition), California DMV
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Answer: You may be required to install one on your vehicle. Installing an ignition interlock device is one of the possible requirements after any DUI conviction; the handbook does not limit it to certain groups.
Source: Section 9: Alcohol and Drugs — DUI Convictions — California Driver's Handbook (web edition), California DMV
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Answer: Six months. The handbook lists a jail sentence of up to six months among the possible penalties for a DUI conviction.
Source: Section 9: Alcohol and Drugs — DUI Convictions — California Driver's Handbook (web edition), California DMV
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Answer: It may be impounded, and you could owe a storage fee. Law enforcement can impound the vehicle of a driver convicted of DUI, and the driver may be charged a storage fee.
Source: Section 9: Alcohol and Drugs — DUI Convictions — California Driver's Handbook (web edition), California DMV
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Answer: Civil lawsuits. Seriously injuring or killing someone while impaired by alcohol or drugs can also lead to civil lawsuits on top of DUI penalties.
Source: Section 9: Alcohol and Drugs — DUI Convictions — California Driver's Handbook (web edition), California DMV
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Answer: The court or DMV may add penalties, since the first DUI is still on record. A DUI stays on your record for 10 years, and getting another DUI during that period can bring an additional penalty from the court or DMV.
Source: Section 9: Alcohol and Drugs — DUI Convictions — California Driver's Handbook (web edition), California DMV
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Answer: When the employer holds an off-site liquor sales license. Drivers under 21 normally need someone 21 or older with them to carry alcohol. The exception is a job with an employer who holds an off-site liquor sales license, with the alcohol in closed containers.
Source: Section 9: Alcohol and Drugs — Drivers Under 21 — California Driver's Handbook (web edition), California DMV
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Answer: Fine the driver and suspend the license for one year. When a driver under 21 is caught with alcohol in the vehicle, the court may impose a fine and suspend the driver's license for one year.
Source: Section 9: Alcohol and Drugs — Drivers Under 21 — California Driver's Handbook (web edition), California DMV
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Answer: Delay their first driver's license by up to one year. If the under-21 driver has no license yet, the court may have DMV postpone issuing their first license by as long as a year.
Source: Section 9: Alcohol and Drugs — Drivers Under 21 — California Driver's Handbook (web edition), California DMV
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Answer: Take a hand-held breath test, a PAS, or another chemical test. When an officer suspects someone under 21 of drinking, the officer can require a hand-held breath test, a preliminary alcohol screening (PAS), or another chemical test.
Source: Section 9: Alcohol and Drugs — Drivers Under 21 — California Driver's Handbook (web edition), California DMV
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Answer: Revoke it for one year. For a driver under 21 convicted of DUI at a BAC of 0.01% or more, DMV may revoke the driving privilege for one year, and a licensed DUI program must also be completed.
Source: Section 9: Alcohol and Drugs — Drivers Under 21 — California Driver's Handbook (web edition), California DMV
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Answer: The driver may be arrested for DUI and have their driving privilege suspended. For a driver under 21, a later test showing a BAC of 0.05% or higher can lead to a DUI arrest and suspension of the driving privilege.
Source: Section 9: Alcohol and Drugs — Drivers Under 21 — California Driver's Handbook (web edition), California DMV
Questions to review:
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California BAC limits
It is illegal to drive with a blood alcohol concentration (BAC) at or above these levels:
| Who | Illegal BAC | Practice |
|---|---|---|
| Drivers 21 and older | 0.08% or higher | Test 1 |
| Drivers of vehicles that need a commercial license | 0.04% or higher | this test |
| Drivers carrying passengers for hire | 0.04% or higher | Test 3 |
| Drivers under 21 | 0.01% or higher | Test 1 |
| Anyone on DUI probation, at any age | 0.01% or higher | Test 4 |
Being under the limit does not make you safe to drive: the handbook says nearly everyone is affected below it, and you can be convicted of DUI without any BAC reading if you are impaired. Driving impaired by a prescription or over-the-counter medicine, or by any mix of alcohol and drugs, is also illegal, and so is using cannabis while you drive or ride in a vehicle.
Rules for drivers under 21
| Situation | Rule | Practice |
|---|---|---|
| Carrying alcohol | Only with someone 21 or older in the vehicle (in a full, sealed container), or when working for an employer with an off-site liquor sales license. | Test 2, this test |
| Caught with alcohol illegally | The vehicle may be impounded for up to 30 days; the court may fine you and suspend your license for one year, or delay your first license by up to one year. | Test 4, this test |
| Suspected of drinking | An officer can require a hand-held breath test, a PAS or another chemical test. A PAS of 0.05% or more can lead to a further breath or blood test. | Test 4, this test |
| DUI conviction at 0.01% or more | DMV may revoke your driving privilege for one year. | this test |
Tests, arrests and convictions
| Stage | What happens | Practice |
|---|---|---|
| Refusing a chemical test | DMV suspends or revokes your driving privilege for one year. By driving in California you have already agreed to testing. | Test 1, this test |
| Arrest | The officer may take your license and give you a 30-day temporary license. You have 10 days to ask DMV for a hearing, and DMV must suspend your privilege even before any conviction. | Test 3, Test 4, this test |
| Conviction | You must complete a DUI program and file proof of insurance (SR 22/SR 1P). You may face up to six months in jail, an ignition interlock device, and impound of your vehicle with a storage fee. | this test |
| Your record | A DUI stays on your record for 10 years, and another DUI in that time can bring added penalties. | Test 1, this test |
Read the full rules in Section 9: Alcohol and Drugs. Penalties can change, so confirm current rules on dmv.ca.gov.
Keep studying
Try the right-of-way test, the parking test and the road signs test, or read how to study for the California permit test.