Exam 7: Tire and Wheel Diagnosis and Service

When balancing wheels with either Dynamic or Road Force Balancers, Technician A says it is really important to follow the instructions provided with the particular balancer you're using. Technician B says that when rebalancing a wheel, if it is out of balance, it is best to remove the old weights and recheck the balance before adding new weights. Who is correct?

________ tires have very short sidewalls and can be difficult to remove and install.

When inspecting tires on the car, you would check for all of the following EXCEPT:

Failure to properly position the tire in the rim's drop-center section before attempting to dismount the tire can result in _________.

Technician A claims that there are only two car/light truck tread pattern designs: street and off-road. Technician B claims the most common car/light truck tread pattern designs are directional, nondirectional, symmetric, asymmetric, and directional and asymmetric. Who is correct?

Technician A says a tire with a Z speed rating has the highest possible speed rating. Technician B says that tire speed ratings give the legal cover for speeding. Who is correct?

________ occurs when a part of the wheel assembly becomes bent or was manufactured improperly.

Manufacturers recommend that tires are rotated at:

Tech A says that directional tires cannot be rotated. Tech B says that all old wheel weights should be removed before balancing a tire. Who is correct?

The tire pressure should be regularly checked and adjusted on vehicles that do not have a(n) ________.

________ is the appearance of dips around the edge of the tread, usually on just one side of the tire.

Technician A says that camber used to be a heavy tire-wearing angle when tires were the bias-ply type and had stiff sidewalls. Technician B says tires can tolerate huge amounts of improper camber much better than before. Who is correct?

Technician A says that a tire will increase or decrease 1 psi for each 10°F of temperature. Technician B says that if the vehicle has been driven to warm the tires, you must adjust the air pressure down to the manufacturer's recommended pressure. Who is correct?

Technician A says that observing tire wear patterns can assist in identifying problems in the steering system. Technician B says that observing tire wear patterns can also assist in identifying problems in the suspension system. Who is correct?

When attempting a repair on a damaged tire all of the following are true; EXCEPT:

If the tire pressure is incorrect, the technician must adjust the pressure using ________.

Two technicians are discussing tire puncture repair using a tire patch. Technician A says that you should use a tire buffer to smooth the area around the hole. Technician B says that a liquid buffing solution should be used to scrub the area just buffed. Who is correct?

All of the following are true about "directional" tires; EXCEPT:

________ stems are normally replaced when new tires are mounted on the rims.

________ is when the red dot is lined up with the rim's lowest point.