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Hardness of rubber is measured on which scale?

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in Basic Civil Engineering by (111k points)
Hardness of rubber is measured on which scale?

(a) Rockwell scale

(b) Shore scale

(c) Mohr’s scale

(d) Vicker’s scale

This question was posed to me in exam.

My doubt is from Rubber topic in chapter Materials for Construction of Basic Civil Engineering

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Correct choice is (b) Shore scale

The best I can explain: Hardness is measured in terms of durometer on a shore scale.  Shore A is used for soft to medium-hard rubber.  Solid rubber has a hardness of 40 duro.

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