Automotive Knowledge Quiz

The designation P205/75R15 appears on a tire. The number 205 indicates the:

• DOT speed rating

• Cross sectional width

• Type of tire

• DOT load index

The rear wheel toe on a vehicle is excessive and the thrust angle is out of specification. Which of these could be the cause?

• A failed right rear wheel bearing

• Excessive front toe

• A bad right rear radial tire

• A bent rear control arm

The steering angle that helps a vehicle return to a straight-ahead position after a turn is:

• Camber

• Toe

• Toe-out-on-turns

• Caster

Premature front wheel bearing failure can be caused by excessive:

• Brake rotor runout

• Steering linkage looseness

• Lug nut torque

• Wheel offset

During a test drive, the technician notices a front-end vibration. Technician A says that too much front tire lateral runout could be the cause Technician B says that an out-of-balance tire could be the cause Who is right?

• A only

• B only

• Both A and B

• Neither A nor B

The drop center section of a wheel is designed to:

• Allow the tire to remain in place in the event of a blowout

• Allow for the removal and installation of a tire on the rim

• Correct the wheel-to-hub offset

• Correct the balance offset of the wheel

A remanufactured power steering gearbox was installed on a vehicle. Now it requires more effort to turn the steering wheel, but the vehicle turns more rapidly. Technician A says that the installation of a wrong gear box for the vehicle application could be the cause Technician B says that the vehicle will have to be aligned to match the new gear box

• A only

• B only

• Both A and B

• Neither A nor B

A customer complains that the steering wheel repeatedly binds and releases during full turns. Which of these is the most likely cause?

• Binding upper bearing plates

• A binding steering column u-joint

• Loose steering rack mounts

• A loose tie rod end

Technician A says that a bent tie rod end can change toe. Technician B says that a binding(sticking) idler arm can change toe. Who is right?

• A only

• B only

• Both A and B

• Neither A nor B

A tire is being evaluated after a small puncture was found in the sidewall. Which of these should be done?

• Plug the tire

• Apply a patch to the inside of the tire

• Discard the tire

• Install compressed tire sealant through the valve stem