Idaho: Alcohol and drugs — Part 1 Practice Test
Questions in this part include: “During the GDL supervised instruction period, which laws must you observe?” · “What is the penalty for a second failure of an evidentiary test within five years?”
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Questions are original and based on the official manual "Idaho Driver's Handbook" (July 2026), Idaho Transportation Department.
All 20 questions in this practice test
Take the test above first, then use this list to study. Tap “Show answer” to see the correct answer and explanation.
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During the GDL supervised instruction period, which laws must you observe?
- Only the laws regarding alcohol
- Only the laws regarding alcohol while a passenger is present
- All laws regarding alcohol and other intoxicating substances
- No special laws, because an adult is supervising
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Correct answer: All laws regarding alcohol and other intoxicating substances
You must observe all laws regarding alcohol and other intoxicating substances.
Source: Idaho Driver's Handbook (July 2026), page 19 · Open this page in the manual (Manual page 19)
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What is an administrative license suspension (ALS)?
- A suspension imposed only after a jury trial
- A suspension for a driver who skips a court date
- A suspension given for any moving violation
- An automatic suspension for failing an evidentiary test
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Correct answer: An automatic suspension for failing an evidentiary test
The manual describes the administrative license suspension as an automatic suspension for failure of an evidentiary test (breath, blood, or urine).
Source: Idaho Driver's Handbook (July 2026), page 124 · Open this page in the manual (Manual page 124)
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What happens when a driver is arrested for DUI and fails an evidentiary test by having an alcohol concentration over the legal limit?
- The driver keeps full privileges until the court date
- A peace officer serves the driver immediately with a Notice of Suspension
- The officer mails a warning letter within a year
- The driver must wait for a hearing before any notice is given
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Correct answer: A peace officer serves the driver immediately with a Notice of Suspension
A peace officer serves a Notice of Suspension immediately to a driver who fails an evidentiary test over the legal limit.
Source: Idaho Driver's Handbook (July 2026), page 125 · Open this page in the manual (Manual page 125)
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Within how many days of the date on the notice of suspension may you request an administrative hearing on an ALS?
- Seven days
- Three days
- Thirty days
- Ninety days
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Correct answer: Seven days
You have the right to request an administrative hearing within seven days of the date on the notice of suspension.
Source: Idaho Driver's Handbook (July 2026), page 125 · Open this page in the manual (Manual page 125)
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How does an ALS relate to the criminal DUI charges brought against a driver?
- The ALS replaces the criminal charges, so no court appearance is needed
- The ALS applies only if the criminal charges are dropped
- It is a civil penalty, and the driver must still appear in court
- The ALS is a criminal penalty imposed by the court
Show answer
Correct answer: It is a civil penalty, and the driver must still appear in court
The ALS is a civil penalty separate from criminal penalties, and the driver must still appear in court for the DUI charges.
Source: Idaho Driver's Handbook (July 2026), page 126 · Open this page in the manual (Manual page 126)
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When does a notice of suspension for an ALS become effective?
- Immediately when it is served
- Thirty days after the date of service
- Seven days after the date of service
- Ninety days after the date of service
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Correct answer: Thirty days after the date of service
The notice becomes effective thirty days after the date of service, the date you received it.
Source: Idaho Driver's Handbook (July 2026), page 126 · Open this page in the manual (Manual page 126)
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For a first failure of an evidentiary test, how long is the ALS suspension of driving privileges?
- Thirty days
- Six months
- One year
- Ninety days
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Correct answer: Ninety days
For a first failure, driving privileges are suspended for ninety days.
Source: Idaho Driver's Handbook (July 2026), page 126 · Open this page in the manual (Manual page 126)
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During which part of a first-failure ALS suspension do you have absolutely no driving privileges?
- The last 30 days
- The first 7 days
- The entire 90 days only if you request a hearing
- The first 30 days
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Correct answer: The first 30 days
You will have absolutely no driving privileges during the first thirty days of the ninety-day suspension.
Source: Idaho Driver's Handbook (July 2026), page 126 · Open this page in the manual (Manual page 126)
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After a first-failure ALS, how long must an ignition interlock device be installed on any vehicle you drive?
- Six months after the end of the suspension period
- One year after the end of the suspension period
- Two years after the end of the suspension period
- Only during the 90-day suspension period
Show answer
Correct answer: One year after the end of the suspension period
You must have an ignition interlock device on any vehicle you drive for one year after the end of your suspension period.
Source: Idaho Driver's Handbook (July 2026), page 126 · Open this page in the manual (Manual page 126)
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What is the penalty for a second failure of an evidentiary test within five years?
- A 90-day suspension with driving privileges for work
- A six-month suspension with a restricted permit
- One year suspended, with no driving privileges of any kind
- A two-year suspension with a restricted permit
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Correct answer: One year suspended, with no driving privileges of any kind
A second failure within five years brings a one-year suspension with absolutely no driving privileges of any kind.
Source: Idaho Driver's Handbook (July 2026), page 126 · Open this page in the manual (Manual page 126)
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Under Idaho's implied consent law, what has a person who drives or is in physical control of a motor vehicle done?
- Consented to a BAC or drug test if suspected of DUI
- Agreed to pay for any damages in a crash
- Agreed to let police search the vehicle at any time
- Given consent to be tested only after a crash
Show answer
Correct answer: Consented to a BAC or drug test if suspected of DUI
Anyone who drives or is in physical control of a motor vehicle has given consent to a BAC or drug test if suspected of driving under the influence.
Source: Idaho Driver's Handbook (July 2026), page 126 · Open this page in the manual (Manual page 126)
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What is the civil penalty for refusing to take a test when requested by a law enforcement officer?
- $25.00, plus a warning letter
- $250.00 and a license suspension
- $100.00, with no suspension
- $500.00, with no suspension
Show answer
Correct answer: $250.00 and a license suspension
A person who refuses is subject to a license suspension and a civil penalty of $250.00.
Source: Idaho Driver's Handbook (July 2026), page 126 · Open this page in the manual (Manual page 126)
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What is the penalty for a first refusal to take a test, if the court upholds the officer's findings?
- A 90-day suspension with a restricted permit
- A 30-day suspension with no driving privileges
- A two-year suspension with a restricted permit
- A one-year suspension with no driving privileges
Show answer
Correct answer: A one-year suspension with no driving privileges
If the court upholds the officer's findings, a first refusal means one year suspended with absolutely no driving privileges of any kind.
Source: Idaho Driver's Handbook (July 2026), page 126 · Open this page in the manual (Manual page 126)
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What is the penalty for a second refusal to take a test within 10 years?
- A two-year absolute suspension
- A one-year absolute suspension
- A 90-day suspension
- A five-year absolute suspension
Show answer
Correct answer: A two-year absolute suspension
A second refusal within 10 years results in a two-year absolute suspension.
Source: Idaho Driver's Handbook (July 2026), page 127 · Open this page in the manual (Manual page 127)
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How does the penalty for refusing a test relate to penalties for a DUI conviction?
- It replaces any court penalty for the DUI
- It applies only if you are not convicted of DUI
- It is in addition to any penalty from a DUI conviction
- It is reduced by any court penalty for the DUI
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Correct answer: It is in addition to any penalty from a DUI conviction
The refusal penalty is in addition to any penalty received in court for a DUI conviction.
Source: Idaho Driver's Handbook (July 2026), page 127 · Open this page in the manual (Manual page 127)
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When does the mandatory ignition interlock device requirement begin for an administrative license suspension?
- As soon as the notice is served
- After your suspension ends
- After the first 30 days of the suspension
- After your hearing is held
Show answer
Correct answer: After your suspension ends
The ignition interlock device is mandatory on all administrative license suspensions, beginning after your suspension ends.
Source: Idaho Driver's Handbook (July 2026), page 127 · Open this page in the manual (Manual page 127)
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After a DUI conviction, which vehicles must have an ignition interlock device installed, unless the court orders otherwise?
- Any vehicle that you drive
- Only the vehicle you were driving when arrested
- Only vehicles registered in your name
- Only commercial vehicles
Show answer
Correct answer: Any vehicle that you drive
A driver convicted of DUI must have an ignition interlock device installed in any vehicle driven, unless the court orders otherwise.
Source: Idaho Driver's Handbook (July 2026), page 127 · Open this page in the manual (Manual page 127)
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What does an ignition interlock device require the driver to do in order to start the vehicle?
- Enter a numeric code
- Show a license to a camera
- Provide a breath sample
- Take a blood test
Show answer
Correct answer: Provide a breath sample
The device requires the driver to provide a breath sample in order to start the vehicle.
Source: Idaho Driver's Handbook (July 2026), page 127 · Open this page in the manual (Manual page 127)
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What happens if the breath sample given to an ignition interlock device shows alcohol at or above a preset level?
- The vehicle starts but the horn sounds
- The vehicle will not start
- The vehicle starts at reduced speed
- The vehicle starts and the police are called
Show answer
Correct answer: The vehicle will not start
If the sample indicates an alcohol content at or above a preset level, the vehicle will not start.
Source: Idaho Driver's Handbook (July 2026), page 127 · Open this page in the manual (Manual page 127)
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According to the handbook, your ability to drive after you have had a few drinks may be impaired:
- long before you or anyone else notices outward signs
- only once you or a passenger notices outward signs
- only when you feel dizzy or sleepy behind the wheel
- only after a trained officer points out the signs
Show answer
Correct answer: long before you or anyone else notices outward signs
The handbook warns that your ability to drive may be impaired long before you or anyone else notices outward signs, so you cannot trust yourself or your friends to judge it.
Source: Idaho Driver's Handbook (July 2026), page 128 · Open this page in the manual (Manual page 128)