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- Question
Overfire burning in a furnace is a phenomenon characterised by
Options- A. supply of excess fuel.
- B. supply of excess air.
- C. burning carbon monoxide and other incombustible in upper zone of furnace by supplying more air.
- D. none of these.
- Correct Answer
- burning carbon monoxide and other incombustible in upper zone of furnace by supplying more air.
- 1. Main gas valve in a gaseous fuel burner is a __________ valve.
Options- A. gate
- B. butterfly
- C. globe
- D. none of these Discuss
- 2. Which is not accomplished in an underfired furnace?
Options- A. Increase in heating capacity/m2 of floor space.
- B. Elimination of cold spot at the bottom of the charge.
- C. Reduction in the temperature of furnace gases.
- D. Portection of the periphery of the charge from excessive radiation. Discuss
- 3. While the fuel fired furnace can be used upto a maximum temperature of about 1700°C, the electric furnace can be used upto a temperature of about __________ °C.
Options- A. 2000
- B. 3000
- C. 4500
- D. 6000 Discuss
- 4. Which of the following is not a recuperative furnace?
Options- A. Soaking pit
- B. Reheating furnace
- C. Steamboiler
- D. Coke oven. Discuss
- 5. Fuel economy in furnaces can be achieved by
Options- A. using oxygen enriched combustion air.
- B. preheating the combustion air.
- C. reducing the heat loss through furnace openings & doors.
- D. all (a), (b) and (c). Discuss
- 6. An improved and fuel efficient version of the pusher type reheating furnace is the __________ furnace.
Options- A. walking beam
- B. shaft
- C. tunnel
- D. rotary hearth Discuss
- 7. Recuperator is
Options- A. not used for fuel gas preheating.
- B. an intermittant waste heat recovery equipment.
- C. a continuous waste heat recovery equipment.
- D. heavier than regenerator meant for the same duty. Discuss
- 8. Waste heat from the outgoing flue gases in a thermal power plant is recovered by a/an
Options- A. economiser
- B. steam superheater
- C. air preheater
- D. all (a), (b) and (c) Discuss
- 9. In which of the following furnaces, the gases are sucked through the stock bed from below?
Options- A. Soaking pit
- B. Sintering machine
- C. Beehive oven
- D. None of these Discuss
- 10. In a furnace, the heat taken by the charge/stock and the heat lost to the furnace structure & flue gases depends on the
Options- A. rate of firing and emissivity of flame.
- B. thermal conductivity of the charge & structural materials of furnace.
- C. nature of process ; whether batch, continuous or intermittant.
- D. all (a), (b) and (c) Discuss
Furnace Technology problems
Search Results
Correct Answer: gate
Correct Answer: Increase in heating capacity/m2 of floor space.
Correct Answer: 4500
Correct Answer: Coke oven.
Correct Answer: all (a), (b) and (c).
Correct Answer: walking beam
Correct Answer: a continuous waste heat recovery equipment.
Correct Answer: all (a), (b) and (c)
Correct Answer: Sintering machine
Correct Answer: all (a), (b) and (c)
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