QuickQuiz: Answers

* True.

* False. Nail holes up to 31/48" on truck tires and 11/44" on passenger tires can be repaired.

* False. The Commercial Vehicle Safety Alliance, which inspects trucks for safety defects, has adopted a blue triangular logo to identify bulges caused by sidewall/shoulder area repairs. Those bulges due to section repairs are acceptable if they do not exceed 31/48" in height.

* True.

* True. Of the 32.2 million replacement tires purchased by trucking fleets in 1997, nearly 19 million were retreads and only a little more than 13 million were new tires.