A driver says that the front end of his car vibrates up and down while traveling at most road speeds. Technician A says that too much runout of the front wheels could be the cause. Technician B says that static out-of-balance of the front wheels could be the cause. Who is right?

• Technician A only

• Technician B only

• Both A and B

• Neither A or B

All of these could cause tire wear if not within the manufacturer’s specifications EXCEPT:

• Caster

• Wheel balance

• Toe-in

• Camber

A customer complains that a vehicle wanders on a bumpy road and needs continual driver correction to stay straight. What could be wrong?

• Excessive negative front caster

• Insufficient front toe

• Rear or front bump steer

• All of the above

Too much caster on the left front wheel will cause the _____

• Vehicle to drift to the left

• Left tire to wear on the outside edge

• Vehicle to drift to the right

• Left tire to wear on the inside edge

The suspension shown below is being checked for ball joint wear. Technician A says the inspection can be made with the front end supported at point X. Technician B says that the inspection can be performed with the front end supported at point Y. Who is right?

• Technician A only

• Technician B only

• Both A and B

• Neither A or B

A vehicle with a manual rack-and-pinion steering gear has a shimmy. Technician A says that worn rack-to-frame mounting bushings could be the cause. Technician B says that loose inner or outer tie-rod ends (sockets) could be the cause. Who is right?

• Technician A only

• Technician B only

• Both A and B

• Neither A or B

A customer complains of excessive body roll. Which of the following is the MOST likely cause?

• Broken stabilizer bar link

• Worn ball joint

• Weak coil spring

• Leaking shock absorber

Technician A says that the ride height of a vehicle is always adjustable. Technician B says that the ride height of a vehicle can only be adjusted on certain models. Who is right?

• Technician A only

• Technician B only

• Both A and B

• Neither A nor B

Technician A says that caster is not a tire-wearing angle. Technician B says that toe-in or toe-out will cause tire wear. Who is right?

• Technician A only

• Technician B only

• Both A and B

• Neither A nor B

Tire cupping is most likely caused by:

• Worn shock absorbers

• Wheel imbalance

• Loose tie-rod ends

• All of the above