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How much volume of carbon black is used in automobile tires?

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in Engineering Material & Metallurgy by (773k points)
How much volume of carbon black is used in automobile tires?

(a) 2-3%

(b) 8-10%

(c) 15-30%

(d) 45-50%

I got this question in an online interview.

Query is from Thermosetting Plastics, Particle Reinforced Composites topic in division Non Metallic Materials of Engineering Material & Metallurgy

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The correct option is (c) 15-30%

To explain: Automobile tires are made of rubber, which is not a high-strength material on its own. Rubber is added with particulate matter such as carbon black to counter this. Around 15 to 30% volume of carbon black is added to the vulcanized rubber.

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