Practice blood alcohol limits, DUI rules and medication: 35 questions based on the Wyoming Driver License Manual: Rules of the Road, 14 of them on Wyoming's own rules.
About one drink per hour
The rate is nearly the same for everyone.
0.02 percent
The limit for drivers younger than 21 is 0.02 percent or more.
Source: Wyoming Statutes Title 31, W.S. 31-5-234(b), W.S. 31-5-234(b); Wyoming Driver License Manual: Rules of the Road (August 2021), Youthful driver suspension, PDF p. 22
Allergy pills and cold remedies
They may contain antihistamines, codeine and alcohol.
Source: Wyoming Driver License Manual: Rules of the Road (August 2021), Other drugs, PDF p. 38
Seven days
The statute sets a minimum of seven days and a maximum of six months.
Source: Wyoming Statutes Title 31, W.S. 31-5-233(e), W.S. 31-5-233(e)
90 days
The suspension applies even if the DWUI charge is later dismissed.
Source: Wyoming Driver License Manual: Rules of the Road (August 2021), Drinking and driving suspensions, PDF p. 19; Wyoming Driver License Manual: Rules of the Road (August 2021), Drinking and driving suspensions, PDF p. 37
One year
A third conviction requires two years.
Source: Wyoming Statutes Title 31, W.S. 31-5-233(f)(iii), W.S. 31-5-233(f)(iii); Wyoming Driver License Manual: Rules of the Road (August 2021), Driving while under the influence, PDF p. 20
You have agreed to a chemical test if arrested for DWUI
Driving on a public highway carries deemed consent to testing following a DWUI arrest.
Source: Wyoming Driver License Manual: Rules of the Road (August 2021), Drinking and driving, PDF p. 37; Wyoming Statutes Title 31, W.S. 31-6-102(a), W.S. 31-6-102(a)
An ignition interlock device for six months
The interlock requirement depends on the alcohol concentration in the department's administrative action.
Source: Wyoming Statutes Title 31, W.S. 31-5-233(f)(ii), W.S. 31-5-233(f)(ii); Wyoming Driver License Manual: Rules of the Road (August 2021), Driving while under the influence, PDF p. 20
No, if the drug makes you incapable of safely driving
Legal entitlement to use a controlled substance is not a defense.
Source: Wyoming Statutes Title 31, W.S. 31-5-233(d), W.S. 31-5-233(d); Wyoming Driver License Manual: Rules of the Road (August 2021), Driving while under the influence, PDF p. 38
0.08 percent or more
The limit applies to driving or actual physical control of a vehicle.
Source: Wyoming Statutes Title 31, W.S. 31-5-233(b)(i), W.S. 31-5-233(b)(i); Wyoming Driver License Manual: Rules of the Road (August 2021), Drinking and driving, PDF p. 19
We wrote these practice questions from the facts in the Wyoming Driver License Manual: Rules of the Road (Rules of the Road, State of Wyoming Driver License Manual, 2021 (last page: produced by the WYDOT Driver Services Program, Public Affairs Office, August 2021); 98 PDF pages, and the PDF page number equals the printed page number. Linked as the Class C manual on the WYDOT page Driver Manuals (https://www.dot.state.wy.us/home/driver_license_records/formsapplications/driver-manuals.html), read 2026-11-10; no newer English edition was linked. The preface says the manual is not the language of the law and that the statutes (Wyoming Laws and Related Statutes) govern. Statutes: Wyoming Statutes Title 31 (Motor Vehicles), the compiled PDF on wyoleg.gov (https://wyoleg.gov/statutes/compress/title31.pdf, read 2026-11-10, it shows amendments up to Laws 2025). Pages not used: county registration office list (PDF p. 90), organ donor, wildlife and Amber Alert text (PDF pp. 15-18), commercial and motorcycle material. Where the 2021 manual differs from or is silent next to the current statute, and how it was handled: (1) Child restraint fines (PDF p. 30: $60 first, $110 later) differ from W.S. 31-5-1304 ($50 first, $100 later); not tested, the age-nine rule (31-5-1303) matches. (2) Crash reporting (PDF p. 67: police when damage is $1,000 or more) differs from W.S. 31-5-1105, which requires immediate notice for an injury, a death, or a vehicle too damaged to operate normally and safely, with no dollar figure; the question uses the statute and the manual's injury-or-disabled wording only. (3) Emergency and maintenance vehicles (PDF pp. 40 and 49 say to slow 20 mph on roads with one lane each way; PDF p. 71-72 and W.S. 31-5-224 limit this to a two-lane road with a posted limit of 45 mph or more, slowing to 20 mph under the limit); not tested in numbers. (4) Passing speed (PDF pp. 54-55 allow 10 mph over the limit while passing) is narrower in W.S. 31-5-203(b): two-lane roads with a posted limit of 50 mph or more, passenger car, pickup or motorcycle not towing, not in construction zones; the question follows the statute. (5) Intersections with no signs (PDF pp. 42-43 say yield to the driver on your right regardless of who arrives first) differ from W.S. 31-5-220, where the vehicle that entered first has priority and the driver on the left yields at about the same time; the question tests only the same-time rule, which both agree on. (6) Seat belts: PDF p. 29 says all occupants must wear belts, W.S. 31-5-1402 requires every driver and passenger to wear one and the driver to require passengers under 12, with only a secondary-enforcement fine of up to $25 for a driver and $10 for a passenger and no stop solely for the violation; questions follow the statute. (7) Texting (PDF p. 89) matches W.S. 31-5-237; Wyoming has no statewide ban on holding a phone for calls, so common phone questions that assume one are excluded. (8) Speed limits (PDF p. 41) match W.S. 31-5-301 for school zones (20 mph), urban and residence districts (30 mph) and state highways (70 mph); the statute adds 65 mph paved and 55 mph unpaved elsewhere and 80 mph on designated interstate sections. (9) Insurance minimums (25/50/20) are in W.S. 31-9-405(b), not in the manual. (10) Fees (PDF p. 11) match W.S. 31-7-113 before the $5 technology fee; WYDOT FAQ amounts include it. (11) Headlights (PDF p. 77: half an hour after sunset to half an hour before sunrise, or when people and vehicles cannot be seen at 1,000 feet) match W.S. 31-5-910. (12) Dimming (PDF p. 78: 500 feet to oncoming, 300 feet behind another vehicle) match W.S. 31-5-924. (13) The manual's amber-light text (PDF p. 97) says to stop if possible; W.S. 31-5-403 only calls steady yellow a warning; the question follows the manual's wording. (14) The manual says a person may be convicted of DWUI at 0.05 percent with other evidence (PDF p. 37); W.S. 31-5-233(c) gives no presumption between 0.05 and 0.08, so it is not tested. (15) The manual's following-distance rule is two seconds for a car; PDF p. 77 also says to increase following distance at least three or four seconds when you cannot see clearly; following_seconds uses the two-second rule. 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 Wyoming Department of Transportation (WYDOT), Driver Services Program, and your actual test will have different questions. Study the handbook, and check the agency's website for current rules.