Wheels, Hubs And Tires Self Test

Front 1

The endplay on a front wheel drive wheel bearing is 1.2 mm (0.050 in). The correct service procedure is to:

A ) replace the bearing assembly.
B ) spin the wheel up to 40 mph to check for noise.
C ) leave the bearing; no service is required.
D ) tighten the axle nut until endplay is reduced.

Back 1

A ) replace the bearing assembly.

Front 2

Wheel runout is measured using a:

A ) ruler.
B ) dial indicator.
C ) tire gauge.
D ) torque wrench.

Back 2

B ) dial indicator.

Front 3

Front wheel bearings on a front-wheel drive vehicle:

A ) have no specified adjustment procedure.
B ) are adjusted by tightening the spindle nut.
C ) are serviced the same as rear-wheel drive wheel bearings.
D ) require periodic adjustment of the spindle nut.

Back 3

A ) have no specified adjustment procedure.

Front 4

During a road test, the steering wheel shakes from side to side at higher speeds. Technician A says this could be caused by front wheels not being statically balanced. Technician B says this could be caused by front wheels not being dynamically balanced. Which technician is correct?

A ) Technician A only
B ) Technician B only
C ) both technicians
D ) neither technician

Back 4

B ) Technician B only

Front 5

Technician A says cupped tires can be caused by worn or defective shock absorbers. Technician B says wheels or tires with a static imbalance can cause tire cupping. Which technician is correct?

A ) Technician A only
B ) Technician B only
C ) both technicians
D ) neither technician

Back 5

C ) both technicians

Front 6

Technician A says a tire is designed to absorb road shock. Technician B says the grip created between the tire and road is called traction. Which technician is correct?

A ) Technician A only
B ) Technician B only
C ) both technicians
D ) neither technician

Back 6

C ) both technicians

Front 7

Technician A says non-serviceable wheel bearings are used mainly with FWD vehicles. Technician B says the inside wheel bearing used with adjustable bearings is larger than the outer one because the inside bearing supports more of the vehicle mass. Which technician is correct?

A ) Technician A only
B ) Technician B only
C ) both technicians
D ) neither technician

Back 7

C ) both technicians

Front 8

Tapered roller type wheel bearings should be packed:

A ) only by machine:
B ) until all spaces between rollers are filled.
C ) with only NGLI #1 grease.
D ) while still wet with solvent.

Back 8

B ) until all spaces between rollers are filled.

Front 9

Over-inflation of tires tends to increase:

A ) the traction of the tire.
B ) tire operating temperature.
C ) wear on the shoulders of the tread.
D ) wear in the centre of the tread.

Back 9

D ) wear in the centre of the tread.

Front 10

A pull condition persists after the front tires are replaced and wheel alignment has been corrected. The next logical step is to:

A ) replace the rear tires.
B ) inflate all tires to 50 psi.
C ) balance the wheels.
D ) switch the front tires from right to left.

Back 10

D ) switch the front tires from right to left.

Front 11

Which of the following conditions could result from a tire operating at lower than recommended air pressure?

A ) reduced traction
B ) increased operating temperature
C ) decreased operating temperature
D ) accelerated wear at the centre of the tread

Back 11

B ) increased operating temperature

Front 12

Which of the following statements are true for a tire marked P215/65R15?

A ) The width of the tire is 65% of its height.
B ) The tire is intended for passenger vehicles.
C ) The tire is 215 cm in diameter.
D ) All of the above statements are true.

Back 12

B ) The tire is intended for passenger vehicles.

Front 13

When mounting wheels on a vehicle, tighten the wheel lug nuts:

A ) as much as possible.
B ) only after driving a few kilometres.
C ) gradually and in sequence to the specified torque.
D ) with an impact wrench.

Back 13

C ) gradually and in sequence to the specified torque.

Front 14

Technician A says the drop centre part of a rim prevents a tire from rolling off the rim if the tire becomes deflated. Technician B claims this is the function of the safety bead. Which technician is correct?

A ) Technician A only
B ) Technician B only
C ) both technicians
D ) neither technician

Back 14

B ) Technician B only

Front 15

A tire is worn with a sharp feathering wear pattern toward the inside of the tire. The most likely cause is:

A ) insufficient tire pressure.
B ) excessive tire pressure.
C ) high speed cornering.
D ) incorrect toe setting.

Back 15

D ) incorrect toe setting.

Front 16

Technician A says the hub, drum, or rotor must be constantly rotating when a bearing adjusting nut is being torqued. Technician B says after a bearing adjusting nut has been initially torqued, the nut is tightened to the next cotter pin hole. Which technician is correct?

A ) Technician A only
B ) Technician B only
C ) both technicians
D ) neither technician

Back 16

A ) Technician A only

Front 17

Which of the following is an allowable front-to-rear mix of different types of tires?

A ) bias-belted front; bias-ply rear
B ) radial-ply front; bias-belted rear
C ) bias-belted front; radial-ply rear
D ) none of the above

Back 17

D ) none of the above

Front 18

The endplay of adjustable tapered roller wheel bearings should be maintained between:

A ) 0.0254 to 0.127 mm (0.001 to 0.005 in).
B ) 0.127 to 0.178 mm (0.005 to 0.007 in).
C ) 0.178 to 0.254 mm (0.007 to 0.010 in).
D ) 0.254 to 0.381 mm (0.010 to 0.015 in).

Back 18

A ) 0.0254 to 0.127 mm (0.001 to 0.005 in).

Front 19

Dynamic imbalance causes:

A ) side to side tire movement.
B ) up and down tire movement.
C ) tire tread cupping.
D ) vehicle wander and weave.

Back 19

A ) side to side tire movement.

Front 20

After washing tapered roller bearings with solvent:

A ) spin them dry with compressed air.
B ) compressed air should not be used.
C ) wipe them dry with a shop towel.
D ) blow them dry without spinning.

Back 20

After washing tapered roller bearings with solvent:

A ) spin them dry with compressed air.
B ) compressed air should not be used.
C ) wipe them dry with a shop towel.
D ) blow them dry without spinning.