Quiz

Test your knowledge on…

Multi-piece Wheels

Some questions have more than one correct answer.

  1. Which of the following may cause a multi-part rim to explode?
    1. It was assembled using the wrong parts
    2. The rim was damaged
    3. One or more of the parts in the rim were worn out
    4. The tire was over-pressurized
    5. The vehicle’s brakes were dragging
       
  2. What percentage of exploding rims cause fatal injuries?
    1. 5 %
    2. 10 %
    3. 20 %
    4. 25 %
    5. 50 %
       
  3. What is the technical term used to describe the breakdown of the rubber compound in a tire?
    1. Halitosis
    2. Mytosis
    3. Oasis
    4. Pyrolysis
    5. Homeostasis
       
  4. Which of the following may cause pyrolysis of one or more of a vehicle’s tires?
    1. Welding on a wheel or rim
    2. Using a cutting torch on a wheel or rim
    3. Electricity from contact with power lines or lightning
    4. Vehicle, wheel or brake fires
    5. Under-inflated tires
       
  5. When performing the tire and rim part of a pre-op check, vehicle operators should be looking for:
    1. Flat, soft, cut or worn tires
    2. Excessive rust or cracks in rims or lock rings
    3. Bent, broken or worn parts
    4. Worn, damaged, elongated bolt holes
    5. Worn, damaged, loose, missing lug nuts

 

Answers to multi-piece wheels quiz

  1. a) + b) + c) may cause a multi-part rim to explode
  2. c) Historically, 20% of multi-part rim accidents have resulted in fatalities
  3. d) Pyrolysis
  4. All of the answers may lead to pyrolysis of tires
  5. All of the answers are items to look for during a circle check

 
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