MCQOPTIONS
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MCQOPTIONS
| 1. |
Which composite system is used in making bulb filaments? |
| A. | Be-Beo |
| B. | Ag-CdO |
| C. | W-ThO<sub>2</sub> |
| D. | Co-ThO<sub>2</sub> |
| Answer» D. Co-ThO<sub>2</sub> | |