Furnace Technology problems
- 1. Ingress of cold air in the furnaces through cracks, charging doors, openings etc.
Options- A. reduces the flue gas temperature and makes the furnace atmosphere oxidising.
- B. increases the load on the induced draft fan.
- C. reduces the furnace draught.
- D. all (a), (b) and (c) Discuss
Correct Answer: all (a), (b) and (c)
- 2. Specific heating capacity of a furnace is expressed as
Options- A. weight heated/hr
- B. weight heated/furnace volume
- C. weight heated/hr/furnace volume
- D. none of these Discuss
Correct Answer: weight heated/hr/furnace volume
- 3. Heat transfer takes place through a liquid medium surrounding the submerged material under heating, in case of a/an
Options- A. blast furnace.
- B. steam boiler.
- C. salt bath furnace.
- D. annealing furnace. Discuss
Correct Answer: salt bath furnace.
- 4. Shaft furnaces are used for
Options- A. smelting
- B. calcining
- C. roasting
- D. all (a), (b) and (c) Discuss
Correct Answer: all (a), (b) and (c)
- 5. Out of the following fuels used in a furnace exhausting flue gas at a temperature of 600°C, the percentage stack loss will be maximum in case of complete combustion of
Options- A. furnace oil with air.
- B. furnace oil with oxygen.
- C. blast furnace gas with air.
- D. blast furnace gas with oxygen. Discuss
Correct Answer: blast furnace gas with air.
- 6. Which is a regenerative furnace?
Options- A. Coke oven heating chamber.
- B. Open hearth furnace.
- C. Both (a) and (b).
- D. Neither (a) nor (b). Discuss
Correct Answer: Both (a) and (b).
- 7. In which of the waste heat recovery equipment, the flow of flue gas and air is alternately reversed after a fixed interval of time?
Options- A. Recuperator
- B. Regenerator
- C. Waste heat boiler
- D. None of these Discuss
Correct Answer: Regenerator
- 8. __________ furnace is not an electric furnace.
Options- A. Arc
- B. Induction
- C. Pot
- D. Resistance. Discuss
Correct Answer: Pot
- 9. Regenerators are normally provided in the
Options- A. glass melting furnace.
- B. open hearth furnace.
- C. by product coke ovens.
- D. all (a), (b) and (c). Discuss
Correct Answer: all (a), (b) and (c).
- 10. Scaling of furnace stock is reduced by __________ in flue gas.
Options- A. CO
- B. H2
- C. high CO/CO2
- D. all (a), (b) & (c) Discuss
Correct Answer: all (a), (b) & (c)
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