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What is the Limiting Oxygen Index (LOI) of PVC?(a) 45 or more(b) 20 or more(c) 45 or less(d) 20 or less |
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Answer» Correct answer is (a) 45 or more Best explanation: Limiting Oxygen Index is a minimum concentration of oxygen that will support combustion of a polymer. It is expressed as a percentage. PVC has good flame retardancy. Air has 20% oxygen, PVC has LOI of 45% or more. |
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