Question 1

The wheel offset is considered negative if the centerline of the rim is inboard of the mounting face and positive if outboard of the mounting face.

Accepted Answer

False

Question 2

A tire filled with nitrogen gas will hold pressure three times longer than if filled with air.

Accepted Answer

Nitrogen molecules are larger than oxygen and other gases, which makes it more difficult for them to escape through the tire walls. This leads to slower pressure loss, meaning tires filled with nitrogen gas will hold pressure longer than those filled with regular air. However, it is important to note that tires still lose pressure over time and should be checked regularly regardless of what gas they are filled with.

Question 3

Some vehicles have left-hand threaded wheel studs and nuts on the driver's side of the vehicle.

Accepted Answer

This is done to ensure that the wheel nuts do not loosen while the vehicle is in motion due to the force of the wheel rotation. The left-hand threaded wheel nuts will tighten as the wheel rotates in a forward direction, reducing the risk of loosening.

Question 4

Most tires used today have built-in tread wear indicators (wear bars) to show when they need replacement.

Accepted Answer

Most tires are manufactured with built-in tread wear indicators or wear bars, which become visible when the tread depth wears down to 2/32 of an inch, indicating that the tire needs to be replaced.

Question 5

A bad axle or wheel bearing will not cause a tire wear problem.

Accepted Answer

A bad axle or wheel bearing can cause uneven tire wear or even cause the tire to wobble, leading to premature wear.

Question 6

When replacing tires, renew the valve stems only if they are leaking.

Accepted Answer

It is recommended to replace the valve stems every time tires are replaced to ensure they are in good condition and prevent potential leaks in the future.

Question 7

A P225/60 R16 89H tire cannot be driven safely at speeds over 130 mph.

Accepted Answer

The speed rating H means that the tire is designed to safely handle speeds up to 130 mph. Driving at speeds over 130 mph can cause the tire to overheat and potentially fail.

Question 8

Radial tires do not require special patches for puncture repair.

Accepted Answer

Radial tires have specific construction and require special patches designed to flex with the tire's radial movement. Regular patches may not provide the necessary durability or flexibility for a proper repair.

Question 9

Amarid and kevlar tire cords are lighter than steel cords and, pound for pound, stronger than steel.

Accepted Answer

Amarid and Kevlar are synthetic fibers known for their high strength-to-weight ratio, making them lighter and stronger than steel when compared pound for pound.

Question 10

Tightening lug nuts beyond specifications may distort the disc brake rotor.

Accepted Answer

Tightening lug nuts beyond specifications can create excessive force, which can lead to warping or distortion of the disc brake rotor. It's important to follow the recommended torque settings provided by the manufacturer to avoid damaging the rotor.

Question 11

Which of the following materials is not used in the body and belts of radial tires?

Accepted Answer

Copper mesh is not typically used as a material in the body and belts of radial tires. The correct materials used are steel mesh, nylon, and fiberglass.

Question 12

When 2/32 inch (1.58 mm) is indicated on a tread depth gauge, the tire should be replaced.

Accepted Answer

According to standard industry guidelines, a tire should be replaced when the tread depth reaches 2/32 inch or 1.58 mm. Therefore, if a tread depth gauge indicates 2/32 inch or less, it is time to replace the tire.

Question 13

The tire pressure warning light on a TPM system will illuminate when the tire pressure drops 5 percent below its minimum pressure.

Accepted Answer

The tire pressure warning light on a TPM system will illuminate when the tire pressure drops to 25% below its recommended pressure.

Question 14

Most asymmetric tires are nondirectional tires.

Accepted Answer

The answer of Most asymmetric tires are nondirectional tires....

Question 15

Tire rotation will not correct wear problems due to misalignment, worn mechanical parts, or incorrect inflation pressures.

Accepted Answer

Tire rotation is a maintenance procedure that is designed to ensure even wear on all four tires. However, it will not correct wear problems due to issues such as misalignment, worn mechanical parts, or incorrect inflation pressures. These issues must be addressed separately in order to prevent further tire wear and ensure proper vehicle performance.

Question 16

A P195/75R14 tire classification includes both metric and English standard measurements.

Accepted Answer

P195/75R14 tire size uses metric measurements for the width (195 mm) and aspect ratio (75%), but uses English standard measurements for the rim diameter (14 inches).

Question 17

An asymmetrical tire has a tread design that is different from one side to the other.

Accepted Answer

An asymmetrical tire has different tread patterns on the inner and outer sides, providing different traits such as better wet weather traction or quietness.

Question 18

A self-sealing tire will seal a puncture up to 3/16 inch (4.76 mm).

Accepted Answer

Self-sealing tires are designed with a layer of sealant inside that can close punctures up to a certain size, typically around 3/16 inch (4.76 mm), to prevent air loss.

Question 19

Profile is another name for a tire's ______.

Accepted Answer

The profile of a tire refers to its aspect ratio, which is the ratio of the tire's height to its width.

Question 20

Studded tires have been outlawed in many states because they damage the road and can be a safety hazard when driven on dry surfaces.

Accepted Answer

Studded tires are outlawed in many states due to road damage and safety hazards when driven on dry surfaces.

Quiz 45: Tires and Wheels