Wipers defrosters and fenders — Minnesota Permit Test
Wipers defrosters and fenders on the Minnesota permit test — 3 rules, each with the reason behind it and a question on it while it is fresh.
The rules
A vehicle with a glass windshield must have working windshield wipers.
Rain turns the glass opaque in seconds. A wiper that has quit leaves you steering blind.
A vehicle with a glass windshield must have working windshield wipers.
Window defrosters are needed to keep the windows and windshield clear of steam and frost.
In a Minnesota winter the glass fogs from the inside while you drive, and only the defroster clears it.
Window defrosters are necessary to keep windows and the windshield clear of steam and frost.
Passenger vehicles must have fenders or other wheel guards.
Without them the tires throw stones and slush straight at the windshield of the car behind.
Passenger vehicles must have fenders or other wheel guards to prevent water, dirt and other material from being thrown into the air by the tires.
On the test
What does a vehicle with a glass windshield have to have?
Working windshield wipers. Rain turns the glass opaque in seconds. A wiper that has quit leaves you steering blind. Minnesota Driver’s Manual, p.24: “A vehicle with a glass windshield must have working windshield wipers.”
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
- One payment, once — not a subscription. Nothing renews and there is nothing to cancel, for an exam you sit one time.
- Free to start: a 10-question test and the first section of cards. No sign-up and no account.
- Paying opens the rest of the cards, unlimited full-length practice tests, and retests built from exactly the questions you got wrong.
- Every level up to Prepared — 3 tests passed in a row.
- Do the work, fail the real exam, and we refund you.
Where these come from
Every rule here is checked against Minnesota Driver’s Manual, published by the Minnesota Department of Public Safety, and against the state code itself. Last checked 2026-09-22.
- src/assets/drivers-manuals/MN.pdf (Minnesota Driver’s Manual, May 2025, Minnesota Department of Public Safety, Driver and Vehicle Services, retrieved 2026-09-14; sha256 pinned in SOURCES.json)
- src/assets/drivers-manuals/MN.pages.txt (the plain pdftotext fixture every citation here was cut from and verified against; sha256 pinned in SOURCES.json)
- src/assets/drivers-manuals/SOURCES.json, MN entry -- the folio offset of 3 and its basis, the folio marker, the extraction-flag score and the welded compounds it costs, and the record of where the exam shape comes from