Quiz Saving Through Reducing Irregular Wear 1. To keep removal mileage high one needs tires with: a) slow rate of wear b) uniform rate of wear c) good inflation pressure maintenance d) pressures maintained at max pressure molded on the tire sidewall Which statement is false? 2. Which type of fleet is most likely not to experience irregular wear: a) pick up and delivery b) coast to coast haulers c) neither of the above d) both of the above 3. Acknowledging that anyone can experience irregular wear, it is most likely to show up in fleets with: a) low miles per 32nd of tread wear b) high miles per 32nd of tread wear c) both equally 4. When determining if you are getting your money's worth out of your tires the most important factor is: a) tires original tread life b) tires initial purchase price c) the number of retreads d) cost per mile over total tire life cycle e) (all of the above) 5. The most effective means of reducing irregular wear is: a) a tire rotation program to change direction of rotation b) rotating tires to different wheel position (steer, drive, trailer) c) a preventive total vehicle maintenance program d) initially choosing the correct tread pattern for the application 6. A checklist for potential sources of irregular wear might include: a) road hazards and conditions b) alignment and maintenance c) equipment d) manufacturing e) all of the above 7. Irregular wear can be caused by: a) dragging or slipping the tire b) bouncing or skipping the tire c) the nature of the tire itself d) all of the above 8. Side forces on the tires on a "set-back steering axle" are potentially: a) less than those on a "normal steering axle" b) more than those on a "normal steering axle" c) about the same as those on a "normal steering axle" 9. As the load per tire increases the side forces: a) decrease b) increase c) do not change 10. On a typical 18 wheeler the load per tire is greatest on: a) trailer tires b) drive axle tires c) steer axle tires 11. During tight turns which of the following axle positions are subjected to the highest side forces: a) steer axle b) drive axles c) trailer axles - standard d) trailer axles - spread e) all equal 12. Alignment can be defined as: "all of the tires and wheels and the vehicle are traveling in the same direction.” a) true b) false 13. The easiest way to detect abrasion on a tire from sideforces is: a) look at the tire b) run a bare hand across the tread surface c) check alignment 14. If a vehicle has excessive toe-in, feathered edges on the tread ribs will be on the: a) outside edges b) inside edges c) both edges 15. Ackerman angle dictates that during a turn: a) both steer axle tires turn the same amount b) the inside tire turns more sharply than the outside tire c) the outside tire turns more sharply than the inside tire d) none of the above 16. When tandem axles are parallel to each other but not perpendicular to the vehicle geometric center line we say that there is a problem with the: a) scrub angle b) thrust angle c) camber angle d) caster angle 17. A tractor trailer combination can experience the "dog tracking" effect when the: a) steering axle is misaligned b) trailer axle is misaligned c) drive axle is misaligned Which statement is incorrect? 18. A tractor trailer combination tends to PULL when the drive axle is misaligned. a) true b) false 19. A tractor trailer combination tends to WANDER when the drive axle is misaligned. a) true b) false 20. A tractor trailer combination tends to PULL when the trailer axles are misaligned. a) true b) false 21. A tractor trailer combination tends to WANDER when the trailer axles are misaligned. a) true b) false 22. Alignment experts say that the: a) steer axle b) drive axle c) trailer axle is the single most troublesome position from an alignment point of view 23. Alignment experts say that the: a) steer b) drive d) trailer is the least troublesome position from an alignment point of view 24. Static imbalance of a tire wheel assembly will cause a: a) wobble effect b) bouncing effect c) neither of the above d) both of the above 25. Dynamic imbalance of a tire wheel assembly will cause a: a) wobble effect b) bouncing effect c) neither of the above d) both of the above 26. On duals one of the two tires may skid and roll at the same time when there are: a) tiny differences in tire diameters b) mismatched tire sizes c) mismatched tread depths d) mismatched inflation pressures e) high torque is being applied Which statement is not true? 27. Inflation pressure in duals realistically should be matched within: a) exactly the same b) 5 psi or less c) 5 - 10 psi d) 10 - 20 psi 28. The Rubber Manufacturers Association recommended that radial ply tires in dual assemblies be matched within: a) 1/4" a) 1/16" b) 1/2" b) 1/8" c) 3/4" c) 1/4" d) 1 1/2" d) 1/2" in circumference in diameter 29. When radial tire inflation pressure is too low for the load being carried, the footprint: a) becomes shorter b) becomes rounder c) may cause dry traction to be reduced d) none of the above 30. A rim width too narrow for the tire produces an effect somewhat similar to: a) over inflation b) under inflation c) correct inflation 31. Camber can be defined as "the inward or outward tilt of the wheel at the top as viewed from the road surface:" a) true b) false 32. Flat spots on a pair of duals as a result of "brake lock" that are minor in nature should be clocked: a) 90 degrees b) 180 degrees d) 270 degrees apart to minimize ride disturbance and irregular wear 33. Bridgestone says: Saving money by reducing irregular wear is "SMART". What do these 5 letters stand for? S___________ M__________ A__________ R__________ T__________ Print this page ANSWERS 1. D 2. A 3. B 4. D 5. C 6. D 7. E 8. B 9. B 10. C 11. D 12. A 13. B 14. B 15. B 16. B 17. A 18. A 19. B 20. B 21. A 22. B 23. A 24. B 25. A 26. E 27. B 28. C 29. D 30. A 31. B 32. B 33. S select the right tire for the job M maintain your tires and vehicles A align your vehicles on a regular basis R rotate tires, as necessary, to equalize wear T track performance of every tire, through its useful life << close >>   © 2006-2008 BFNT, LLC l legal notice