Idaho driver fitness practice questions
2 questions below test Idaho’s own driver fitness law, each with the statute or Idaho Division of Motor Vehicles handbook section it came from, plus 10 more on driver fitness rules that apply in every state.
The Idaho permit knowledge test has 40 questions in total and needs 34 correct (85%) to pass.
Idaho law
2 questions on Idaho’s own driver fitness rules
These differ from the rules that hold nationally — they are the ones that catch out drivers who studied another state’s handbook.
1. Under Idaho law, you are considered to be driving under the influence if you are under 21 and your BAC is:
- A0.10% or more
- B0.08% or more only
- C0.05% or more
- 0.02% or more
Answer: 0.02% or more. The Idaho Driver’s Manual states you are considered DUI if your BAC is .02 or more if you are under 21 years of age.
Source: Idaho Driver's Manual — Driving Under the Influence
2. For an Idaho driver 21 or older, the DUI BAC threshold is:
- A0.10% or more
- BAny measurable amount
- C0.05% or more
- 0.08% or more
Answer: 0.08% or more. The Idaho Driver’s Manual states you are considered DUI at .08 or more if you are 21 or older (and .04 or more when operating a commercial vehicle).
Source: Idaho Driver's Manual — Driving Under the Influence
Sources for the Idaho items above
Applies everywhere
Driver fitness rules that hold in every state
A sample of the national driver fitness bank. All 10 are in the practice run, combined with the Idaho items above for 12 questions in total.
1. Under state Implied Consent laws, by accepting a driver license you automatically agree to:
- AProvide transportation for emergency personnel
- BCarry full commercial insurance
- CPay all traffic fines immediately
- Submit to a chemical test for alcohol or drugs if lawfully requested
Answer: Submit to a chemical test for alcohol or drugs if lawfully requested. Implied Consent means that by driving on public roads, you have given consent to breath, blood, or urine testing if arrested for suspected DUI.
Source: Official state driver handbook — Driver fitness — implied consent
2. What is the only reliable remedy for driver fatigue?
- AOpening the windows
- BTurning up the radio
- CCoffee or an energy drink
- Sleep
Answer: Sleep. Caffeine, cold air, and music mask drowsiness briefly. Only real sleep restores alertness, so stop somewhere safe and rest.
Source: Official state driver handbook — Driver fitness — fatigue
3. Which of these is an early warning sign of drowsy driving?
- ANoticing signs sooner
- BChecking mirrors more often
- Drifting from your lane or missing an exit
- DGripping the wheel more firmly
Answer: Drifting from your lane or missing an exit. Lane drift, repeated yawning, heavy eyelids, and missed exits or signs all indicate that fatigue is already affecting your driving.
Source: Official state driver handbook — Driver fitness — fatigue
More Idaho topics
Other Idaho rules with their own questions
Driver fitness elsewhere
Driver fitness rules in other states
Driver fitness law is set state by state — compare how another state handles it.
Confirm current Idaho rules
Statutes and handbooks change. Idaho Division of Motor Vehicles is authoritative for Idaho driver fitness rules and for the permit test itself.
Visit Idaho Division of Motor VehiclesCommon questions
About Idaho driver fitness rules and this practice set.