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| Q. |
The temperature at which plastics begin to become softer and defer under a load is known as |
| A. | softening point |
| B. | melting point |
| C. | eutectic point |
| D. | heat distortion point |
| Answer» D. heat distortion point | |
| Explanation: heat distortion point is the temperature at which plastics begin to become softer and defer under a load. the softening point is the temperature at which a flat-ended needle of 1 mm2 penetrates the test same at 1 mm2 depth. eutectic point the temperature at which a mixture freezes or melts. the melting point is the temperature at which the state of the body changes from solid to liquid. | |
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