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Furnace Technology-Data Intensity 3 Multiple Questions and Answers.
| 6. | Hearth furnaces are not used for___? | ||
| A. | Roasting | ||
| B. | Melting | ||
| C. | Reheating | ||
| D. | None of these | ||
| 8. | Regenerators are used for waste heat recovery in___? | ||
| A. | By-product coke ovens | ||
| B. | Beehive coke oven | ||
| C. | Blast furnace stoves | ||
| D. | Soaking pits | ||
| 9. | Ceramic recuperators (made of SiC) is economical, only when used for preheating combustion air above ____ °C? | ||
| A. | 250 | ||
| B. | 650 | ||
| C. | 850 | ||
| D. | 1000 | ||
| 10. | Air filtration in a furnace______? | ||
| A. | Reduces its thermal efficiency | ||
| B. | Is indicated by flame sting out | ||
| C. | Increases the flue gas temperature | ||
| D. | None of these | ||
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