Discussion
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- Question
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)
- Correct Answer
- all (a), (b) and (c)
- 1. 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
- 2. 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
- 3. If the flame is produced under the hearth and then sweeps up into the heating chamber, this is called a/an __________ furnace.
Options- A. sidefired
- B. underfired
- C. covered
- D. recirculating Discuss
- 4. The resistance furnace produces heat by the
Options- A. electric arc struck between electrodes and the charge.
- B. flow of current through a heating element.
- C. combination of induced current and skin effect.
- D. none of these Discuss
- 5. Combustion of furnace oil in a furnace (soaking pit) with preheated combustion air at 400°C results in saving of about __________ percent furnace oil as compared to its combustion with atmospheric air, if the flue gas outlet temperature from the soaking pit is 1200°C.
Options- A. 5
- B. 60
- C. 20
- D. 40 Discuss
- 6. 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
- 7. 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
- 8. 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
- 9. 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
- 10. 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
Furnace Technology problems
Search Results
Correct Answer: muffle furnace
Correct Answer: regenerative
Correct Answer: underfired
Correct Answer: flow of current through a heating element.
Correct Answer: 20
Correct Answer: Blast furnace stove
Correct Answer: flame temperature
Correct Answer: movement of gases
Correct Answer: all (a), (b) and (c).
Correct Answer: combustion of coal by supplying it around the burner.
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