Q. Glasses show evidence of _____ fractures.

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Q. Plastics and elastomers differ due to their properties of ________

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Q. Which of the following is not a characteristic of rubber?

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Q. How does the crystallinity of an elastomer affect its strength?

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Q. The loss of heat in elastomers due to friction is known as ________

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Q. How is the hardness of an elastomer measured?

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Q. What is the thermal conductivity of rubber?

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Q. What is the trade name for natural polyisoprene?

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Q. What is the percentage of elongation of styrene butadiene?

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Q. What is Buna N rubber?

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Q. What is the service temperature of polysiloxane?

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Q. What is the hardening temperature of unvulcanized natural rubber?

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Q. Which of the following is not a characteristic of natural rubber?

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Q. Addition of ______ results in the vulcanization of rubber.

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Q. __________ is a reinforcement filler.

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Q. Buna S rubbers consisting of over 50% styrene are considered as _________

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Q. What is ACM elastomer?

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Q. What is the glass transition temperature of polybutadiene?

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Q. What is Hypalon?

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Q. How much sulfur must be added to rubber for vulcanization?

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