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What should the sulphur level in foam plastic be?(a) More than 1%(b) Between 0.5% to 1%(c) Less than 0.1%(d) Between 0.1% to 0.5% |
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Answer» The correct option is (c) Less than 0.1% Best explanation: In foam plastic, for making pattern, the sulphur level must be below 0.1%. If the levels are higher than mentioned, it can be deleterious in manufacturing. |
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