Required reflectors mirror horn brakes — Montana Permit Test

Required reflectors mirror horn brakes on the Montana permit test — 5 rules, each with the reason behind it and a question on it while it is fresh.

The rules

Rear red reflectors must be visible at night in high beams at all distances between 50 and 300 feet.

A parked car with dead lights shows nothing in the dark unless its reflectors catch your beams.

Must be visible at night when in front of high beam headlights for all distances between 50 and 300 feet.

Montana Driver Manual, p.15

A muffler must prevent excessive or unusual noise.

A roaring engine drowns out sirens and horns for everyone nearby.

Must prevent excessive or unusual noise.

Montana Driver Manual, p.15

A vehicle's mirror must give 200 feet of view to the rear.

A mirror that shows only a few car lengths hides a fast car coming up behind.

Vehicles manufactured after January 1, 1956, must provide 200-foot visibility to rear of the vehicle.

Montana Driver Manual, p.15

Brakes and parking brakes must control, stop and hold the vehicle under every load and on any grade it uses.

A parking brake that slips on a hill lets an empty car roll into the street.

Must control the movement, stop, and hold of the vehicle under all conditions of loading and on any grade incident to its operation.

Montana Driver Manual, p.15

A horn must give a warning that can be heard for 200 feet.

A weak horn is useless if the person you are warning cannot hear it.

Must provide warning audible for 200 feet.

Montana Driver Manual, p.15

On the test

Rear red reflectors must be visible in high beams at what range of distances?

Between 50 and 300 feet. A parked car with dead lights shows nothing in the dark unless its reflectors catch your beams. Montana Driver Manual, p.15: “Must be visible at night when in front of high beam headlights for all distances between 50 and 300 feet.”

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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Where these come from

Every rule here is checked against Montana Driver Manual, published by the Montana Department of Justice, and against the state code itself. Last checked 2026-10-04.