Question 1

The section height divided by the section width is the _____ of the tire.

Accepted Answer

The aspect ratio of a tire is defined as the ratio of its section height to its section width. This measurement is important because it affects the tire's performance, handling, and appearance.

Question 2

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

Accepted Answer

An asymmetrical tire does indeed have a tread design that is different from one side to the other. This is intended to provide better performance in different driving conditions, such as wet or dry roads.

Question 3

A self-sealing tire contains an extra lining along the undertread, which contains a sealant that can immediately seal punctures in the tire, up to about 7 mm.

Accepted Answer

False

Question 4

Tire tread patterns can be:

Accepted Answer

Tire tread patterns can indeed be symmetrical, asymmetrical, or directional, each serving different purposes and providing various benefits in terms of handling, noise, and performance under specific conditions.

Question 5

The first ______ numbers of the tire size are the width of the tire, sidewall to sidewall, in millimeters.

Accepted Answer

The first three numbers of the tire size indicate the width of the tire from sidewall to sidewall in millimeters.

Question 6

Underinflation or lack of rotation causes excessive wear on the __________ of the tread.

Accepted Answer

The answer of Underinflation or lack of rotation causes excessive...

Question 7

____________________ tires means removing the wheels and tires from their current location and moving them to another corner of the vehicle.

Accepted Answer

The answer of ____________________ tires means removing the wheels and...

Question 8

Technician A says that the air inside the tire acts against the inner surface of the tire to support the weight of the vehicle.Technician B says that radial tires, having belts around the circumference of the tire, are the most common type of tire used.Who is correct?

Accepted Answer

Both statements are correct. Technician A is correct in stating that the air inside the tire supports the vehicle's weight by exerting pressure against the inner surface of the tire. Technician B is correct in stating that radial tires, which have belts running around the circumference, are the most common type of tire used today due to their durability and performance benefits.

Question 9

Which term describes the position of the mounting surface compared to the center of wheel depth?

Accepted Answer

Wheel offset refers to the distance between the wheel's mounting surface and the centerline of the wheel. It determines how the wheels sit in relation to the car's bodywork and suspension.

Question 10

Radial tires are constructed of layers of belts or ____________________ that are wrapped around the tire in circular bands.

Accepted Answer

The answer of Radial tires are constructed of layers of...

Question 11

____________________ tires rely on air pressure.

Accepted Answer

The answer of ____________________ tires rely on air pressure....

Question 12

The last four numbers in the DOT number provide the production date of the tire by week number and ____________________.

Accepted Answer

The answer of The last four numbers in the DOT...

Question 13

In general, a higher treadwear number means the tire will wear better and last longer than a tire with a lower treadwear number.

Accepted Answer

The treadwear rating is a comparative indicator given by manufacturers that suggests how long the tire's tread should last in comparison to a standard reference tire. A higher treadwear number typically indicates that the tire will have a longer lifespan under similar conditions.

Question 14

Which of the following statements is true with regard to common air loss problems?

Accepted Answer

A common cause of leaks around the bead area indeed is rust or corrosion buildup around the rim bead. This can prevent the tire from sealing properly. Valve stems can deteriorate or leak over time due to exposure to the elements and mechanical damage. A weakened sidewall is a structural issue and cannot be safely repaired; the tire needs to be replaced. Similarly, dry rot indicates the tire's rubber has degraded significantly, and it cannot be repaired.

Question 15

Which of the following tire types has a support ring attached to the wheel that the tire rests on if pressure is lost?

Accepted Answer

Auxiliary supported run-flat tires have a support ring attached to the wheel that the tire rests on if pressure is lost, allowing continued operation.

Question 16

The tire size markings for most passenger car tires in the United States use a combination of letters and numbers.

Accepted Answer

Tire size markings for passenger cars in the United States typically include a combination of letters (indicating the type of tire and its intended use) and numbers (specifying the tire's dimensions, aspect ratio, and construction type).

Question 17

Which of the following uses the vehicle's antilock brake system (ABS) to monitor tire pressure?

Accepted Answer

Indirect TPMS uses the vehicle's antilock brake system (ABS) to monitor tire pressure by comparing the rotational speed of the tires. A tire with lower pressure will have a smaller diameter and thus rotate faster than tires with correct pressure, which the system can detect. Direct TPMS, on the other hand, uses pressure sensors within each tire to directly measure the tire pressure.

Question 18

The tire pressure monitoring system must be able to alert the driver within ten minutes when pressure is five percent or more below the cold tire inflation pressure.

Accepted Answer

The tire pressure monitoring system (TPMS) must alert the driver when the pressure is 25 percent or more below the recommended cold tire inflation pressure.

Question 19

Technician A says directional tires will have markings on the sidewall to indicate how the tire must be mounted to the vehicle.Technician B says tire tread patterns may be symmetric or asymmetric.Who is correct?

Accepted Answer

Both statements are correct. Directional tires do have specific markings on the sidewall indicating the correct mounting direction to ensure proper performance and safety. Tire tread patterns can indeed be symmetric, where the tread pattern is the same across the tire's face, or asymmetric, where the tread pattern changes across the tire's face to optimize performance in various conditions.

Question 20

Which of the following exists if the wheel and/or tire are out-of-round?

Accepted Answer

Radial runout occurs when the wheel or tire is not perfectly round, causing variations in the distance from the center of the wheel to the tread or rim.

Quiz 5: Wheels, Tires, and Wheel Bearings