Discussion
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- Question
An example of a periodic furnace is the
Options- A. blast furnace stoves
- B. blast furnace
- C. coke oven heating chamber
- D. rotary kilns
- Correct Answer
- blast furnace stoves
- 1. 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
- 2. 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
- 3. Which is not a hearth furnace?
Options- A. Glass tank furnace
- B. Open hearth furnace
- C. Cupola
- D. Reheating furnace Discuss
- 4. 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
- 5. 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 Discuss
- 6. Calcination of limestone to produce lime is done in a __________ kiln.
Options- A. tunnel
- B. rotary
- C. vertical shaft
- D. both (b) and (c) Discuss
- 7. Acid dew point temperature (ADT) of a flue gas produced by the combustion of a fuel containing 1% sulphur may be about __________ °C.
Options- A. 80
- B. 130
- C. 180
- D. 250 Discuss
- 8. Ostwald charts are meant for
Options- A. computing the excess/deficiency of combustion air.
- B. calculation of flue gas temperature.
- C. computation of flue gas analysis.
- D. none of these. Discuss
- 9. The thermal efficiency of an air/fuel gas preheating recuperator may be as high as __________ percent.
Options- A. 50
- B. 65
- C. 85
- D. 99 Discuss
- 10. In order to maintain a reducing atmosphere in a furnace, it should have
Options- A. no O2 in flue gas
- B. CO in flue gas
- C. high excess air
- D. none of these Discuss
Furnace Technology problems
Search Results
Correct Answer: increasing the draft in the furnace.
Correct Answer: both (b) and (c)
Correct Answer: Cupola
Correct Answer: efficient use of fuel.
Correct Answer: 40
Correct Answer: both (b) and (c)
Correct Answer: 130
Correct Answer: computing the excess/deficiency of combustion air.
Correct Answer: 85
Correct Answer: CO in flue gas
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