Alcohol effects — New Hampshire Permit Test
Alcohol effects on the New Hampshire permit test — 4 rules, each with the reason behind it and a question on it while it is fresh.
The rules
Alcohol and other impairing drugs reduce a driver’s judgment, vision and reaction time.
Those three are the whole job of driving. Losing any of them is enough; alcohol takes all three at once.
Alcohol and other impairing drugs reduce a driver’s judgment, vision, and reaction time.
Alcohol blurs vision, slows the ability to focus, causes double vision, and reduces the ability to judge distance, speed and movement.
A driver who cannot judge a closing gap will pull out in front of a car they can see perfectly well.
Blurs vision, slows the driver’s ability to focus, causes double vision, and reduces the ability to judge distance, speed and the movement of other vehicles.
Vision is impacted at .02 BAC for all drivers.
It is the same figure as the under-21 limit, and it is where the measurable damage to driving begins for everybody.
Vision is impacted at .02 BAC for all drivers.
Alcohol slows a driver’s ability to process information and respond to the driving task.
Reaction time is the gap between seeing the trouble and doing something about it, and alcohol stretches that gap.
Slows a driver’s ability to process information and respond to the driving task.
On the test
Which three abilities do alcohol and impairing drugs reduce?
Judgment, vision and reaction time. Those three are the whole job of driving. Losing any of them is enough; alcohol takes all three at once. New Hampshire Driver's Manual, p.8: “Alcohol and other impairing drugs reduce a driver’s judgment, vision, and reaction time.”
How this works
Most practice tests hand you a bank of questions and leave the manual somewhere else. This one puts them together.
You read one law and the reason behind it, then answer a question on that law while it is still fresh. Get it right and you move on; get it wrong and you have found the gap while it is cheap to fix, not on the morning of the exam.
Learning one rule at a time, and proving it immediately, is what turns a manual you skimmed into something you actually know — and it makes studying feel like getting somewhere rather than like waiting to find out.
What it costs
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All New Hampshire permit topics
Where these come from
Every rule here is checked against New Hampshire Driver's Manual, published by the New Hampshire Division of Motor Vehicles, and against the state code itself. Last checked 2026-09-16.
- src/assets/drivers-manuals/NH.pdf (New Hampshire Driver's Manual, Rev. 11/25, New Hampshire Division of Motor Vehicles, retrieved 2026-09-14)
- src/assets/drivers-manuals/NH.pages.txt (plain pdftotext over that PDF; sha256 pinned in SOURCES.json)
- src/assets/drivers-manuals/SOURCES.json (sha256, folio offset 6, folioMarker, nonLawPages, signGalleryPages and the extraction flag, each with its basis)