What is the legal blood alcohol limit for drivers 21 and older in Utah?
- 0.10
- 0.05
- 0.08
- 0.15
Show the answer
0.05
Utah was the first state with a .05 limit. You can also be charged below it if alcohol or drugs make you unsafe to drive.
Utah Alcohol & Drugs practice test
Practice blood alcohol limits, DUI rules and medication: 27 questions based on the Utah Driver Handbook, 14 of them on Utah's own rules.
Key Utah facts: Alcohol & Drugs
- Illegal, over-the-counter and prescribed drugs can all affect reflexes, judgment, vision and alertness. Section 10, Impairing Drugs and Driving, PDF p. 61
- In Utah a driver commits DUI with a blood or breath alcohol concentration of .05 or more, or when impaired by alcohol or drugs to a degree that makes driving unsafe; Utah was the first state with a .05 limit. Utah Code 41-6a-502(1); Section 10, C. Alcohol and the Law, PDF p. 62; Driver License History, PDF p. 5
- After a DUI arrest of a driver 21 or older, the license is suspended for 120 days for a first suspension and two years for a second within 10 years, starting on the 60th day after the arrest. Utah Code 53-3-223(7)
- A driver under 21 with any measurable alcohol has driving privileges denied for at least six months for a first offense; a second offense within 10 years brings two years or until age 21, whichever is longer. Utah Code 53-3-231(7); Section 10, Not-a-Drop Act, PDF p. 62
- A first court order suspending a minor for an alcohol possession or consumption offense brings a one-year suspension, and a second or later order two years. Utah Code 53-3-219(2); Section 10, B. 21 and Under, PDF p. 62
Sample Alcohol & Drugs questions
When does impairment from alcohol start?
- Only above 0.08
- Only after 2 hours
- After the third drink
- With the first drink
Show the answer
With the first drink
A single drink can already change how well you drive.
Source: Utah Driver Handbook, Section 10, A. Effects of Alcohol and Drugs, PDF p. 61
A driver under 21 commits a second Not-a-Drop offense within 10 years. How long is the suspension?
- 30 days from the date of arrest
- Two years or until 21, whichever is longer
- Until the driver's next birthday
- Six months, the same as a first offense
Show the answer
Two years or until 21, whichever is longer
The first offense brings at least six months.
Source: Utah Code 53-3-231, Utah Code 53-3-231(7); Section 10, Not-a-Drop Act, PDF p. 62
A 17-year-old is convicted of possessing alcohol for the first time. How long is the license suspended?
- Five years
- One week
- One year
- One month
Show the answer
One year
A second or later offense brings two years.
Source: Utah Code 53-3-219, Utah Code 53-3-219(2); Section 10, B. 21 and Under, PDF p. 62
Under Utah's implied consent law, which test may an officer ask you to take?
- Breath, blood, urine or oral fluid
- Only a vision test at the station
- A new written knowledge test
- A hearing test at the roadside
Show the answer
Breath, blood, urine or oral fluid
By driving in Utah you have agreed to take the test when asked.
Source: Utah Driver Handbook, Section 10, Implied Consent Law, PDF p. 63
A 19-year-old drives with any measurable alcohol in their body. What happens for a first offense?
- A 10-day license suspension
- A written warning only, with no penalty
- Privileges are denied for six months
- Nothing, since it is below 0.05
Show the answer
Privileges are denied for six months
Utah's Not-a-Drop Act applies to every driver under 21.
Source: Utah Code 53-3-231, Utah Code 53-3-231(7); Section 10, Not-a-Drop Act, PDF p. 62
Do Utah's DUI laws also apply to operating a motorboat?
- Only for boats over 30 feet
- Yes, the same laws apply
- No, boats are exempt
- Only on Lake Powell
Show the answer
Yes, the same laws apply
Let someone who has not been drinking do the driving.
Source: Utah Driver Handbook, Section 10, E. Boating While Under the Influence, PDF p. 63
An alcohol restricted driver drives with a small, measurable amount of alcohol. Is that a crime?
- No, only 0.05 or more is illegal
- Yes, any detectable alcohol is illegal
- No, not if they feel sober
- Only when driving on an interstate
Show the answer
Yes, any detectable alcohol is illegal
An alcohol restricted driver may not have any measurable alcohol in the body while driving.
Source: Utah Code 41-6a-530, Utah Code 41-6a-530(1); Section 10, D. Alcohol-Restricted Driver, PDF p. 63
Which drugs can impair your driving?
- Only drugs given by injection at a clinic
- None of them, if taken with a full meal
- Only illegal drugs bought on the street
- Illegal, over-the-counter and prescribed drugs
Show the answer
Illegal, over-the-counter and prescribed drugs
Like alcohol, drugs can slow your reactions and dull your judgment, eyesight and attention.
Source: Utah Driver Handbook, Section 10, Impairing Drugs and Driving, PDF p. 61
A 30-year-old refuses a chemical test after a DUI arrest. How long is the license revoked for a first refusal?
- 6 months
- There is no penalty
- 18 months
- 30 days
Show the answer
18 months
It is 36 months with a prior offense within 10 years.
Source: Utah Code 41-6a-521, Utah Code 41-6a-521(1)(d); Section 10, Implied Consent Law, PDF p. 63
More Utah practice
- Full practice testAll topics, as in the knowledge test
- Road SignsWhat signs mean and what to do when you see them89 questions, 11 on Utah rules
- Right-of-WayWho goes first at intersections, crosswalks and roundabouts26 questions, 13 on Utah rules
- Traffic SignalsLights, arrows and pedestrian signals21 questions, 12 on Utah rules
- Lanes & TurnsLane markings, turns, passing and merging23 questions, 11 on Utah rules
- Speed LimitsLimits and how to adjust your speed19 questions, 10 on Utah rules
- ParkingCurb colors, hills and where you can't park20 questions, 11 on Utah rules
- Safe DrivingFollowing distance, weather, night driving and sharing the road47 questions, 22 on Utah rules
- EmergenciesBreakdowns, emergency vehicles and railroad crossings22 questions, 14 on Utah rules
- License RulesPermits, restrictions for new drivers and points28 questions, 28 on Utah rules
- Insurance & CollisionsRequired coverage and what to do after a crash19 questions, 10 on Utah rules
- Phones & DistractionPhone rules and other distractions16 questions, 11 on Utah rules
About these questions
We wrote these practice questions from the facts in the Utah Driver Handbook (2026 edition (Driver-Handbook-2026.pdf on dld.utah.gov, last modified 2026-08-27, 115 PDF pages; lists new laws effective May 6, 2026), read 2026-11-09. Page numbers cited are PDF pages (PDF page = printed page + 10). Where the handbook is silent or out of date, the Driver License Division pages on dld.utah.gov and the Utah Code on le.utah.gov (Titles 41 and 53, read 2026-11-09) are the source. Handbook statements that differ from the current Utah Code and were left out of the questions: child restraint 'eight and under' (Utah Code 41-6a-1803: younger than eight) and 'a citation for each unrestrained passenger' (41-6a-1803(3): one offense); driving without insurance 'class B misdemeanor' (41-12a-302(3), amended 2026: class C); failing to stop at an injury crash 'third-degree felony' (41-6a-401.3(4): class A misdemeanor unless aggravated); a DUI plea held in abeyance (41-6a-502(7): a plea may not be held in abeyance); ignition interlock periods of three years under 21 and 10 years for automobile homicide (41-6a-518.2(2): two and four years); and the age-16 night restriction in the handbook table (41-8-2: younger than 17; the questions use a 16-year-old). edition) and from official sources on road signs. Every answer links to its source, so you can check it and read more.
DMV Decoded is an independent guide, not a government agency. This practice test is not connected to the Utah Driver License Division, and your actual test will have different questions. Study the handbook, and check the agency's website for current rules.