Exam 45: Tires and Wheels

A bubble balancer performs a(n) ____________________ balance on a tire and wheel.

Technician A says a vehicle can be driven indefinitely on a high-pressure mini spare tire. Technician B says using a space saver spare tire can cause the ABS system to set a code. Who is correct?

In a P195/70 R14 79H tire, the number 79 is the ____________________ rating of the tire.

Technician A says an uneven rumble or a grinding sound indicates possible wheel bearing problems. Technician B says wheel bearings should be checked for wear and looseness by grasping the top and bottom of the tire and trying to wobble the wheel and tire back and forth. Who is correct?

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

What three materials are used to construct wheels?

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

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

Technician A says many modern vehicles are equipped with bias ply or belted-bias ply tires. Technician B says modern vehicles are equipped with radial ply tires. Who is correct?

A tire's ____________________ is the ratio of its cross-sectional height (from tread to bead) to its cross-sectional width (from sidewall to sidewall).

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

The tire ____________________, or safety compliance certification label, is generally found on the driver's door jamb.

Technician A says radial ply tires are more rigid in the sidewall area than bias ply tires. Technician B says the belts in a radial tire restrict tread motion during contact with the road, thus improving tread life and traction. Who is correct?

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

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.