Discussion
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- Question
The thermal efficiency of a steel slab reheating furnace (walking beam type) may be about __________ percent.
Options- A. 15
- B. 40
- C. 70
- D. 85
- Correct Answer
- 40
- 1. Which furnace employs preheating, heating and soaking zones?
Options- A. Soaking pit
- B. Reheating furnace
- C. Open hearth furnace
- D. Cupola Discuss
- 2. Means for giving direction to the circulation of gases in furnaces are
Options- A. fans.
- B. arrangement of heating stock in the furnaces.
- C. location of outlet ports and heating & combustion devices.
- D. all (a), (b) and (c). Discuss
- 3. To reduce the stack loss, heat recovery from flue gas can be done by
Options- A. preheating of cold stock.
- B. preheating of combustion air.
- C. steam generation in waste heat boilers.
- D. all (a), (b) and (c). Discuss
- 4. Maximum heat transfer in high temperature furnaces is by
Options- A. conduction
- B. convection
- C. radiation
- D. either (a), (b) or (c); depends on the type of furnace Discuss
- 5. The heat recoverable from flue gases of furnaces depends on the
Options- A. thermal efficiency of furnace.
- B. quantity of flue gases.
- C. flue gas temperature drop through the furnace.
- D. all (a), (b) and (c). Discuss
- 6. Low stack loss indicates the
Options- A. use of sub-stoichiometric air for combustion.
- B. efficient use of fuel.
- C. inefficient use of fuel.
- D. oxygen enrichment of combustion air. Discuss
- 7. Which is not a hearth furnace?
Options- A. Glass tank furnace
- B. Open hearth furnace
- C. Cupola
- D. Reheating furnace Discuss
- 8. Coke ovens in steel plant are heated by
Options- A. electricity
- B. blast furnace gas/mixed gas
- C. coke oven gas
- D. both (b) and (c) Discuss
- 9. Higher furnace temperature can not be achieved by use of a lean fuel gas in the furnace by
Options- A. increasing the draft in the furnace.
- B. preheating the fuel gas.
- C. oxygen enrichment of combustion air.
- D. preheating the combustion air. Discuss
- 10. An example of a periodic furnace is the
Options- A. blast furnace stoves
- B. blast furnace
- C. coke oven heating chamber
- D. rotary kilns Discuss
Furnace Technology problems
Search Results
Correct Answer: Reheating furnace
Correct Answer: all (a), (b) and (c).
Correct Answer: all (a), (b) and (c).
Correct Answer: radiation
Correct Answer: all (a), (b) and (c).
Correct Answer: efficient use of fuel.
Correct Answer: Cupola
Correct Answer: both (b) and (c)
Correct Answer: increasing the draft in the furnace.
Correct Answer: blast furnace stoves
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