Exam 45: Tires and Wheels

Tread wear is indicated as a number that ranges from ____________________ and higher.

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

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

Tire sidewall markings are being discussed. Technician A says maximum load, traction, and wear ratings are indicated. Technician B says maximum inflation pressure, tread plies, and sidewall plies are indicated. Who is correct?

Technician A says radial tires can be mixed with other types of tires on the same vehicle. Technician B says tires should be replaced with ones of the same or higher speed rating. Who is correct?

When too much water separates the tire from the road, ____________________occurs.

Most manufacturers recommend tire rotation at least every ____________________ miles.

What is the difference between sprung weight and unsprung weight?

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

On a P215/65 R15 89H tire, what is the profile of the tire?

Technician A says modern vehicles use tubeless tires. Technician B says only heavy-duty trucks use pneumatic tires. Who is correct?

Which of the following properties is NOT printed on the tire placard?

What three services may be needed to correct an uneven tire tread wear problem?

A(n)____________________ -type wheel balancer measures the deflection of the tire as it rolls under pressure applied to the tire by a roller. Then it makes recommendations for the service required to remove all runout.

Which of the following is NOT rated by the UTQG (Uniform Tire Quality Grading)rating system ?

A self-sealing tire will seal a puncture up to 7/16 inch (11.11 mm).

A tire that is off center and has an eccentricity problem is said to have ____________________ runout.

Technician A says the more aggressive the tread, the more noise it will make. Technician B says softer tires typically make more noise and last longer. Who is correct?

Technician A says that front-bearing assembly locknuts for RWD vehicles are heavily torqued to maintain the bearing adjustment. Technician B says that the axle nut for a FWD front-wheel bearing assembly is often staked in place. Who is correct?

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