Q.

Which of the following is used as filler in tyre of rubber?

A. Carbon black
B. Coal
C. Coke
D. Graphite
Answer» A. Carbon black
Explanation: The most common use (70%) of carbon black is as a pigment and reinforcing phase in automobile tires. Carbon black also helps conduct heat away from the tread and belt area of the tire, reducing thermal damage and increasing tire life.
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