11. Calorific value of dry wood may be around __________ Kcal/kg.
12. Calorific value of bituminous coal may be around __________ Kcal/kg.
13. Calorific value of a typical dry anthracite coal may be around __________ Kcal/kg.
14. Ash content in the coke produced from a coking coal having 20% ash may be around __________ percent.
15. Pick out the wrong statement.
16. Volatile matter content of metallurgical coke may be around __________ percent.
17. Quantity of coke produced from metallurgical coal may be around __________ percent.
18. Abrasion index of blast furnace coke should be around __________ percent.
19. Which of the following is not a binder for coal briquetting?
20. Natural draught produced by a chimney depends upon the
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