Chapter 36a

Multiple Choice

Today’s automotive tires are filled with air, meaning they are _____. (36.1)

• hydraulic

• pneumatic

• synthetic

• all are correct

Multiple Choice

Today’s vehicles use _____ tires. (36.1)

• inner tube

• tubeless

• off-road

• bias

Open Ended

Compare the construction and typical uses of radial ply tires and bias ply tires.

Multiple Choice

Rolling resistance is increased by higher inflation pressure, proper tire design, and lower vehicle weight. (36.1)

• True

• False

Multiple Choice

All American passenger cars manufactured since the early 1980s have been factory equipped with _____ tires. (36.1)

• bias ply

• belted bias

• radial

• solid natural rubber

Multiple Select

Which of the following statements about the sidewall of a tire are correct? Multiple Answer

• It is the outer rubber edge from bead to tread

• It provides tire information through markings

• It is responsible for the patterned surface that contacts the road

• It is strengthened by belts

Multiple Choice

Which of the following is the most common tire identification system?

• P-metric size designation

• Alphanumeric size designation

• Load/size relationship

• Radial design

Multiple Select

Which of the following elements are included in a P-metric tire size designation?

• Type of tire

• Section width in millimeters

• Height-to-width ratio

• Load/size relationship

Multiple Choice

The comparison of a tire’s height (bead-to-tread distance) and width (sidewall-to-sidewall distance) is known as the tire’s _____ ratio. (36.2)

• bias

• aspect

• cross-sectional

• load index

Multiple Choice

What is the maximum inflation pressure typically recommended for most tires?

• 38-40 psi (262-275 kPa)

• 20-25 psi (138-172 kPa)

• 50-55 psi (345-379 kPa)

• 10-15 psi (69-103 kPa)

Multiple Choice

Why is tire pressure typically referred to as 'cold inflation pressure'?

• Because it is measured when tires are cool, not heated from driving

• Because it is measured in cold weather only

• Because it prevents tires from freezing

• Because it is the lowest possible pressure

Multiple Choice

Which of the following statements best describes how the maximum load rating of a tire is determined?

• It is based on the number of plies in the tire and the recommended inflation pressure.

• It is determined solely by the tire's diameter.

• It depends only on the tire's tread pattern.

• It is based on the tire's speed rating.

Multiple Choice

The amount of weight a tire can carry at the recommended inflation pressure is known as the _____ number. (36.2)

• strength

• bias

• load index

• wear rating

Multiple Select

The lower the tread wear number, the less resistant the tire is to wear. (36.2)

• True

• False

Multiple Choice

Which of the following tire traction ratings provides the least traction? (36.2)

• AA

• A

• B

• C

Multiple Choice

The _____ tread pattern on asymmetric tires is designed to improve cornering on dry surfaces, while the _____ tread pattern is designed to improve traction on wet surfaces. (36.3)

• outer; inner

• inner; outer

• inner; center

• center; outer

Multiple Choice

_____ tires are high-performance tires designed to rotate in a specific direction to minimize hydroplaning. (36.3)

• Rotational

• Directional

• Radial

• Bias ply

Multiple Choice

What is the significance of the three-peak mountain snowflake symbol on a tire's sidewall?

• Indicates the tire is rated for severe snow conditions

• Shows the tire is suitable for high temperatures

• Means the tire is a retread

• Indicates the tire is a compact spare

Multiple Choice

Which kind of spare tire is used on most new cars? (36.3)

• Compact spare tire

• Full-size spare tire

• Collapsible spare tire

• No spare tire

Multiple Select

Which of the following statements about compact or space saver spare tires is/are correct?

• They are smaller than regular tires.

• They have thin sidewall and tread construction.

• They hold higher-than-normal air pressure.

• They are designed for long-term use.

Multiple Choice

1.    _____ tires have extremely stiff sidewall construction so they are usable for a predetermined distance after suffering a loss of air pressure. (36.3)

• Steel belted

• Run-flat

• Synthetic rubber

• None are correct

Open Ended

Why are large truck tires often recapped, and why are retreads seldom used on passenger cars?

Multiple Choice

Wear bars are small, raised sections of rubber within the tire's tread grooves designed to indicate when a tire has reached a critical level and needs replacement.

• True

• False

Multiple Choice

All vehicles with gross vehicle weight rating of less than 10,000 lb sold on or after September 1, 2007 in the US are equipped with a direct tire pressure monitoring system.

• True

• False

Multiple Choice

Technician A says that on passenger vehicles, the center wheel section of a drop-center wheel has a smaller diameter than the rim to ease tire installation and removal. Technician B says that the majority of automotive wheels are made of aluminum. Who is correct? (36.5)

• A Only

• B Only

• Both A and B

• Neither A nor B

Multiple Choice

Technician A says that depending on the vehicle manufacturer, lug nuts are manufactured with both right-hand threads (turn clockwise to tighten) or left-hand threads (turn counterclockwise to tighten). Technician B says that lug studs are press-fit into the hub or axle flange and can only be removed with manufacturer-specific tools. Who is correct? (36.5)

• A Only

• B Only

• Both A and B

• Neither A nor B

Open Ended

What is one key concept you learned today about tire, wheel, or wheel bearing fundamentals that you found most interesting or useful?