Tire pressure and penny test — Arizona Permit Test

Tire pressure and penny test on the Arizona permit test — 4 rules, each with the reason behind it and a question on it while it is fresh.

The rules

The recommended tire pressure (psi) for your car is typically found on the door jamb.

Tires filled to a guess can run too soft and overheat, or too hard and lose grip.

Find the recommended psi (pounds per square inch for your vehicle, typically on the door jamb.

Arizona Driver License Manual and Customer Service Guide, p.19

Use a tire pressure gauge to read the pressure, then add air or let some out as needed.

You cannot tell a low tire by looking at it. A gauge shows what your eye misses.

Use a tire pressure gauge to check the reading and either add air or let it out as needed.

Arizona Driver License Manual and Customer Service Guide, p.19

In the penny test, part of Lincoln’s head should be covered by the tread; if it is not, it may be time to replace your tires.

Worn tread cannot push water out of the way, so a bald tire slides on a wet road.

Part of Lincoln’s head should be covered by the tread. If not, it may be time to replace your tires.

Arizona Driver License Manual and Customer Service Guide, p.19

For the penny test, place Lincoln’s head into a groove where the tread looks lowest.

Tires wear unevenly. Testing a good spot can hide a bald one next to it.

Select a point on your tire where the tread appears to be lowest and place Abraham Lincoln’s head into one of the grooves.

Arizona Driver License Manual and Customer Service Guide, p.19

On the test

Where is the recommended tire pressure for your car typically printed?

On the door jamb. Tires filled to a guess can run too soft and overheat, or too hard and lose grip. Arizona Driver License Manual and Customer Service Guide, p.19: “Find the recommended psi (pounds per square inch for your vehicle, typically on the door jamb.”

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 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.