Your car starts, but a serious steering defect makes it unsafe. Does a valid registration make highway driving acceptable?
Correct answer: No; the vehicle must also be mechanically safe.
Registration does not replace a safe vehicle. Arizona requires equipment in working order and a mechanical condition that does not endanger the driver, occupants or other road users.
Source: Arizona Revised Statutes 28-981, subsection A(1)–(2). ↗
Under normal conditions, an ordinary highway vehicle’s working horn must be audible from at least what distance?
Correct answer: 200 feet.
The ordinary horn requirement is at least 200 feet under normal conditions. This is not the separate audible-distance requirement for an emergency-vehicle siren.
Source: Arizona Revised Statutes 28-954, subsection A. ↗
You are on a highway and another driver is slow to move. Which reason justifies using your horn?
Correct answer: Giving a warning reasonably needed for safe operation.
Arizona limits highway horn use to warnings reasonably necessary for safe vehicle operation. It is not a tool for punishing delay or expressing frustration.
Source: Arizona Revised Statutes 28-954, subsection B. ↗
Luggage blocks your view through the rear of a human-driven vehicle. What mirror arrangement does Arizona require?
Correct answer: Two mirrors providing a rearward highway view of at least 200 feet.
When construction or loading obstructs the driver’s rearward view, two properly located mirrors must provide the required 200-foot view. Rear passengers do not replace that equipment.
Source: Arizona Revised Statutes 28-956. ↗
The windshield wipers on your ordinary car have stopped working. What does Arizona require?
Correct answer: Keep the wipers maintained in working order.
The windshield must have a driver-controlled cleaning device, and its wipers must be maintained in working order. Waiting until poor visibility develops is not a substitute for maintenance.
Source: Arizona Revised Statutes 28-957, subsection A–B. ↗
You need to replace a car door window. Which material is required?
Correct answer: Safety glass meeting the applicable safety standards.
Replacement glazing must be safety glass. Its manufacture or treatment reduces the danger from shattered or flying glass and must meet applicable federal safety standards.
Source: Arizona Revised Statutes 28-959, subsection D–E. ↗
A gasoline-car owner opens a muffler bypass before driving on a highway. Is that permitted?
Correct answer: No; a muffler bypass may not be used on the highway.
A highway vehicle may not use a muffler cutout, bypass or similar device. A working muffler must remain in operation; the statute separately exempts electrically powered vehicles.
Source: Arizona Revised Statutes 28-955, subsection A–B and F. ↗
A gasoline car produces excessive smoke because its engine is poorly adjusted. What is required?
Correct answer: Correct the condition so excessive fumes or smoke do not escape.
The engine and power mechanism must be equipped and adjusted to prevent excessive fumes or smoke. This is a maintenance duty, not merely a noise issue.
Source: Arizona Revised Statutes 28-955, subsection C. ↗
After refueling a gasoline car, you discover its required fuel-tank cap is missing. What must close the filling spout before highway operation?
Correct answer: A compliant cap or cover made from noncombustible material.
The fuel filling spout must be properly closed by a cap or cover meeting applicable federal safety standards. A makeshift plug does not satisfy that requirement.
Source: Arizona Revised Statutes 28-965. ↗
Your passenger starts a movie on a dashboard screen visible to you while you drive. May you watch it because someone else selected it?
Correct answer: No; selecting it for you does not make watching the movie lawful.
The moving driver may not watch entertainment video. The rule does not become inapplicable merely because a passenger operates the device.
Source: Arizona Revised Statutes 28-963, subsection A(1)–(2) and B. ↗
Is a display showing a rear-camera view treated like a prohibited entertainment movie while the car is moving?
Correct answer: No; displays supplementing the driver’s surroundings view are excepted.
A display that supplements the driver’s view around the vehicle has a specific exception. That purpose does not authorize entertainment content or remove the need to observe traffic.
Source: Arizona Revised Statutes 28-963, subsection C(2)(c). ↗
What is the minimum head-lamp arrangement required on an ordinary passenger car?
Correct answer: At least two, with at least one on each side of the front.
An ordinary car needs at least two front head lamps, including one on each side. The different motorcycle and other vehicle exceptions are not the rule for the car described.
Source: Arizona Revised Statutes 28-924, subsection A. ↗
One of your car’s installed stop lamps is defective, but another still works. Is one working lamp enough to satisfy Arizona’s equipment rule?
Correct answer: No; every stop lamp must meet the applicable requirements.
Arizona requires a stop lamp and requires every installed stop lamp to comply with the applicable standard. The first-violation warning provision does not make defective lamps acceptable equipment.
Source: Arizona Revised Statutes 28-927, subsection B–C. ↗
A modern car’s parking brake holds it when empty but cannot hold it on its operating grade with its normal load on clean pavement. Is that sufficient?
Correct answer: No; it must hold the loaded vehicle on that grade.
For the vehicles covered by this requirement, parking brakes must hold on operating grades under all loading conditions on a surface free of snow, ice or loose material. This question describes those conditions.
Source: Arizona Revised Statutes 28-952, subsection A(6)(a). ↗
You tow an ordinary utility trailer with a gross weight of exactly 3,000 pounds on the highway. Does it need its own brakes?
Correct answer: Yes; the trailer-brake threshold includes 3,000 pounds.
The requirement begins at a gross weight of 3,000 pounds, including the boundary value. The brakes must control, stop and hold the trailer and operate through the towing driver or automatically with the towing vehicle’s service brakes.
Source: Arizona Revised Statutes 28-952, subsection A(3). ↗
A utility trailer subject to Arizona’s trailer-brake requirement accidentally separates from its tow vehicle. How must its braking system respond?
Correct answer: The trailer brakes must apply automatically.
The required trailer-brake system must apply automatically if the towed vehicle accidentally breaks away. The scenario is an ordinary utility trailer, not the separate drive-away/tow-away truck exception.
Source: Arizona Revised Statutes 28-952, subsection A(3). ↗
