Required brakes muffler and emissions — Arizona Permit Test
Required brakes muffler and emissions on the Arizona permit test — 7 rules, each with the reason behind it and a question on it while it is fresh.
The rules
Cars and trucks must have both a foot brake and a parking brake.
If the foot brake fails or the car is left on a slope, the parking brake is what holds it.
Cars and trucks must have both a foot brake and a parking brake.
Each set of brakes on a car or truck must apply to at least 2 wheels.
A brake that grabs one wheel alone can spin the car instead of stopping it.
Each set of brakes must apply to at least two wheels.
A motorcycle must have at least one brake, which may be applied by hand or foot.
A bike that cannot stop is as dangerous to others as it is to its rider.
A motorcycle must have at least one brake that may be applied by hand or foot.
Every motor vehicle must have a muffler in good working condition and in constant operation to prevent excessive pollution or unusual noise.
A loud, leaking exhaust fills the street with noise and fumes, and can leak into the car itself.
Every motor vehicle must have a muffler in good working condition and in constant operation to prevent excessive pollution or unusual noise.
It is against the law to use a muffler cut-out, bypass or similar device.
A cut-out lets the exhaust skip the muffler, which puts the noise and smoke right back.
It is against the law to use a muffler “cut-out,” bypass or similar device.
Motor vehicles of the 1967 model year and newer must have an exhaust emissions system to help reduce air pollution.
Without it, the car pumps extra smoke into the air everyone in the city breathes.
Motor vehicles of 1967 model year and newer must be equipped with an exhaust emissions system to help reduce air pollution.
Vehicles must have a windshield without cracks and windshield wipers in good working condition.
A crack in your line of sight or a worn wiper in a monsoon storm can hide a car stopped ahead.
Vehicles must have a windshield (without cracks and windshield wipers that are in good working condition.
On the test
What brakes must a car or truck have?
A foot brake and a parking brake. If the foot brake fails or the car is left on a slope, the parking brake is what holds it. Arizona Driver License Manual and Customer Service Guide, p.21: “Cars and trucks must have both a foot brake and a parking brake.”
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 Arizona Driver License Manual and Customer Service Guide, published by the Arizona Department of Transportation, and against the state code itself. Last checked 2026-09-28.
- src/assets/drivers-manuals/AZ.pdf (Arizona Driver License Manual and Customer Service Guide, Revised September 2026, ADOT MVD, retrieved 2026-09-14; sha256 pinned in SOURCES.json)
- src/assets/drivers-manuals/AZ.pages.txt (the plain pdftotext fixture every citation here was cut from and verified against; sha256 pinned in SOURCES.json)
- src/assets/drivers-manuals/AZ-exam.html (azdot.gov/mvd/services/driver-license-ID/permit-test as served on 2026-09-28; the only source for both exam figures)
- src/assets/drivers-manuals/SOURCES.json, AZ entry -- the folio marker and its basis, the extraction-flag score and its welded compounds, and the record of where the exam shape comes from
- docs/plans/how-to-build-laws.md (the runbook this corpus follows)