MCQOPTIONS
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MCQOPTIONS
| 1. |
What is meant by thermoplastic? |
| A. | It softens on heating and returns to original hardness on cooling |
| B. | It hardens on heating and returns to original hardness on cooling |
| C. | It hardens on heating and retains hardness on cooling |
| D. | It softens on heating and retains hardness on cooling |
| Answer» B. It hardens on heating and returns to original hardness on cooling | |