Furnace Technology problems
- 1. Operation of blast furnace stove is based on the principles of a __________ furnace.
Options- A. regenerative
- B. recuperative
- C. both (a) and (b)
- D. neither (a) nor (b). Discuss
Correct Answer: regenerative
- 2. A refractory wall separating the stock and the source of heat is provided in a
Options- A. updraft kiln
- B. muffle furnace
- C. continuous furnace
- D. none of these Discuss
Correct Answer: muffle furnace
- 3. Amount of coal lost in ash particle, which is carried through the boiler system, depends upon the
Options- A. physical nature, ash content and fineness of the coal.
- B. amount of excess air supplied and load on the boiler.
- C. type of burner and combustion chamber.
- D. all (a), (b) and (c) Discuss
Correct Answer: all (a), (b) and (c)
- 4. Which one is not an induced draught furnace?
Options- A. Blast furnace stove
- B. Sintering furnace
- C. High pressure boiler
- D. None of these Discuss
Correct Answer: Blast furnace stove
- 5. Combustion of fuel in a furnace with oxygen enriched air results in higher
Options- A. flue gas volume
- B. flame temperature
- C. fuel consumption
- D. stack loss Discuss
Correct Answer: flame temperature
- 6. Furnace aerodynamics is related to the __________ in the furnace.
Options- A. movement of gases
- B. measurement of flue gas volume
- C. temperature control
- D. pressure adjustment Discuss
Correct Answer: movement of gases
- 7. Advantages of use of preheated combustion air are
Options- A. saving in fuel consumption.
- B. reduction in scale losses.
- C. increase in flame temperature.
- D. all (a), (b) and (c). Discuss
Correct Answer: all (a), (b) and (c).
- 8. In case of pulverised coal fired steam boiler, the secondary air serves the main purpose of
Options- A. transportation of coal.
- B. drying of coal.
- C. combustion of coal by supplying it around the burner.
- D. preheating the primary air. Discuss
Correct Answer: combustion of coal by supplying it around the burner.
- 9. The rate of scaling of furnace stock depends upon the
Options- A. temperature
- B. time
- C. nature of atmosphere
- D. all (a), (b) and (c) Discuss
Correct Answer: all (a), (b) and (c)
- 10. Fuel economy in an industrial furnace operation can not be achieved by the use of
Options- A. stoichiometric combustion air.
- B. non-preheated combustion air.
- C. combustion air not enriched with oxygen.
- D. recupterators. Discuss
Correct Answer: stoichiometric combustion air.
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