Discussion
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- Question
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)
- Correct Answer
- all (a), (b) and (c)
- 1. 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
- 2. 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
- 3. 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. Discuss
- 4. Main gas valve in a gaseous fuel burner is a __________ valve.
Options- A. gate
- B. butterfly
- C. globe
- D. none of these Discuss
- 5. 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
- 6. 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
- 7. 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
- 8. Which of the following variables affects the furnace capacity?
Options- A. Temperature of flue gas.
- B. Thermal conductivity of stock.
- C. Thickness of heating stock.
- D. All (a), (b) and (c). Discuss
- 9. A shallow pond in which the sewage is retained and biologically treated is called
Options- A. oxidation
- B. Imhoff tank
- C. lagoon
- D. skimming tank Discuss
- 10. Which of the following is the most severe air pollutant?
Options- A. hydrocarbons
- B. NOx
- C. SO2
- D. CO Discuss
Furnace Technology problems
Search Results
Correct Answer: a continuous waste heat recovery equipment.
Correct Answer: walking beam
Correct Answer: burning carbon monoxide and other incombustible in upper zone of furnace by supplying more air.
Correct Answer: gate
Correct Answer: Increase in heating capacity/m2 of floor space.
Correct Answer: Sintering machine
Correct Answer: all (a), (b) and (c)
Correct Answer: All (a), (b) and (c).
Correct Answer: oxidation
Correct Answer: NOx
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