Wheels, Hubs and Tire Flashcards
If a tire is marked 96Y on the sidewall, this represents the tire’s:
a) relationship of width to height in mm
b) wear and traction rating
c) load and speed rating
d) year and week of manufacture
c) load and speed rating
What centres hub-centric wheels on the vehicle?
a) the taper on the lug nut
b) the center bore of the wheel
c) rotating the wheel while torquing
d) all of the above
b) the center bore of the wheel
What is the purpose of the drop centre part of a wheel?
a) allows the tire to be removed
b) keeps the tire on the wheel if air pressure is lost
c) adjusts the wheel offset more positive
d) all of the above
a) allows the tire to be removed
Which of the following statements are true for a ire marked P215/65R15?
a) the width of a tire is 65% of its height
b) the height of the tire is 65% of its width
c) the tire is 215 cm in diameter
d) the tire is intended for commercial vehicles
b) the height of the tire is 65% of its width
Sealed ball bearings:
a) have no specified adjustment procedure
b) are adjusted by tightening the spindle nut
c) are serviced the same as tapered wheel wheel bearings
d) require periodic adjustment of the spindle nut
a) have no specified adjustment procedure
Why do manufacturers always use tapered roller bearings in pairs?
a) to spread the load over a greater area
b) to retain the wheel if one bearing fails
c) because radial loads force the parts closer together
d) because they only control axial thrust in one direction
d) because they only control axial thrust in one direction
Tapered roller and ball bearings are both a(an) __________ design
antifriction
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
d) wear in the centre of the tread
Worn or defective shock absorbers cause cupped tires
a) true
b) false
a) true
Dynamic imbalance causes:
a) side to side movement
b) up and down tire movement
c) tire tread cupping
d) heel and toe wear on the tire
a) side to side movement
A pull condition exists after the front tires are replaces and wheel alignments is 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
d) switch the front tires from right to left
When inflating a tire to seat the bead, never exceed _________.
a) 140 kPa (20psi)
b) 210 kPa (30psi)
c) 275 kPa (40psi)
d) 345 kPa (50psi)
c) 275 kPa (40psi)
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
c) gradually and in sequence tot he specified torque
After washing tapered roller bearings with solvent:
a) spin them dry with compressed air
b) do not use compressed air to dry them
c) wipe them dry with a shop towel
d) blow them dry without spinning
d) blow them dry without spinning
What is the proper way to pack tapered roller type wheel bearings?
a) only by machine
b) until all spaces between rollers are filled
c) with only NGLI #1 grease
d) while still wet with solvent
b) until all spaces between rollers are filled
