1. The most obvious damage indication of a tire designed for on-highway use
being run in off-road conditions is:
a) tread chips and cuts
b) rapid, but even wear
c) sidewall damage
d) none of the above
2. When chunks of rubber are torn off the surface of the tread, the torn rib
surface has the appearance of:
a) being rough and striated
b) polished and smooth
c) neither of the above
3. An indication that a new retread did not bond to the casing properly is:
a) the cap being worn smoothly in some areas
b) a smooth and polished appearance under the loose cap
c) neither of the above
d) both of the above
4. When water is allowed through a cut in the sidewall or tread and travels
along the cord elements, this is called:
a) wicking
b) bridging
c) both of above
d) none of above
5. A condition that has the appearance of a ply end separation but does not go
all the way to the ply ends and is on the surface only is called:
a) bead area flow crack
b) ply end separation
c) bead bundle separation
d) none of the above
6. An indication of an open sidewall splice condition is:
a) damage runs parallel to the radial body cords
b) inside of damaged area is smooth
c) does not penetrate all the way to the steel cord
d) all of the above
7. Belts ripped diagonally and fragments thrown through the opening is a result of:
a) impact damage
b) belt separation
c) ply end separation
d) none of the above
8. Lug base cracking can be a result of:
a) high torque
b) high load conditions
c) high heat from ambient temperatures
d) all of the above
9. Rib tear can occur when a vehicle has:
a) run over curbs or RR tracks at off angles
b) is operated in high ambient temperatures
c) made many tight turns generating high side forces
d) all of the above
10. A 1/8" diameter hole in the tread area should be repaired with:
a) repair plug unit only
b) interior patch only
c) patch/plug combination unit
d) none of the above
11. The blue triangle on the sidewall of a tire as specified by the Commercial
Vehicle Safety Alliance, indicates that:
a) the tire has been retreaded
b) the tire is for original equipment specifications
c) the tire has had a section repair
d) the tire has a balance pad
12. The maximum allowable bulge height of a sidewall section repair is:
a) 1/8"
b) 1/4"
c) 3/8"
d) 1/2"
13. A truck tire bead that has been burned while operating on a vehicle is a
result of:
a) damage during mounting
b) manufacturing anomaly
c) overheated brake drum from lack of air flow in the surrounding
area
d) tire run underinflated
14. A circumferential crack in the bead area caused by a body ply end
separation starts from the inside and works its way out:
a) true
b) false
15. Bridgestone recommends that you evaluate your scrap tires
after they are pulled off the vehicle and dismounted:
a) 60 - 90 days
b) immediately
c) 30 days
d) none of the above
16. Experience has shown that the longer tires sit on the scrap pile, the less
successful repairing or retreading may be.
a) true
b) false
17. In the following sample DOT number: DOT WZUR FLA 125, the week
and year of production is:
a) 25th week of 1991
b) 12th week of 1995
c) neither of the above
18. When inspecting a damaged tire it is important to use a systematic
approach. Inspection must include:
a) upper/lower sidewall and shoulder
b) tread area
c) bead area
d) interior
e) all of the above
19. Cuts, grooves and/or scratches running in the same direction as the tire
would turn indicate that the vehicle got stuck and the drive tire was spun.
a) true
b) false
20. A tire with cuts and chipping localized in the middle of the tread area
indicates the inflation pressure in the tire was:
a) too low for the load being carried (underinflated)
b) too high for the load being carried (overinflated)
c) correct for the load being carried (correct)
d) none of the above
21. Cutting, chipping and chunking on the tread area that exposes steel cords will:
a) lead to rust conditions
b) lead to a separation of the tread from the belts
c) probably lead to a non-retreadable casing
d) all of the above
