Adjusting mirrors — New Hampshire Permit Test
Adjusting mirrors on the New Hampshire permit test — 3 rules, each with the reason behind it and a question on it while it is fresh.
The rules
The inside mirror is the primary mirror for viewing traffic to the rear, and should be adjusted so that it frames the rear window.
Framing the window is a test you can do in a second, and it means the mirror is showing the whole of what is behind rather than part of it.
The inside mirror is the primary mirror to view traffic flow to the rear of the vehicle and should be adjusted so that it frames the rear window when the driver looks at it.
Even properly adjusted mirrors will not eliminate all blind spots, so proper head checks should be incorporated whenever possible.
Mirrors leave a gap beside the car big enough to hide another vehicle, and only turning your head closes it.
even properly adjusted mirrors will not eliminate all blind spots.
If the vehicle has a day/night mirror, the driver should make sure it is set for the current time of day.
A mirror left on the night setting dims everything behind it, and one left on day throws headlight glare into the driver’s eyes.
If the vehicle has a day/ night mirror, ensure that it is set for the current time of day.
On the test
How should the inside mirror be adjusted?
So that it frames the rear window. Framing the window is a test you can do in a second, and it means the mirror is showing the whole of what is behind rather than part of it. New Hampshire Driver's Manual, p.11: “The inside mirror is the primary mirror to view traffic flow to the rear of the vehicle and should be adjusted so that it frames the rear window when the driver looks at it.”
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.
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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)