Discussion
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- Question
Test specimen for determination of refractoriness under load (RUL) of a refractory is heated in a
Options- A. furnace employing neutral atmosphere.
- B. carbon resistance furnace.
- C. reducing atmosphere.
- D. furnace employing negative pressure.
- Correct Answer
- carbon resistance furnace.
- 1. The method of Lobo and Evans is concerned with the calculation of the
Options- A. heat absorption in radiant section of a furnace.
- B. heat transfer by forced convection in a reboiler.
- C. heat transfer in vacuum condensers.
- D. mass transfer co-efficient. Discuss
- 2. Flue gas outlet temperature from the chimney of any furnace should be ideally about __________ °C.
Options- A. 50
- B. 100
- C. 150
- D. 250 Discuss
- 3. Forced recirculation of furnace gases is practised
Options- A. to increase heat transfer by convection.
- B. to ensure uniform temperature.
- C. in furnaces, operating below 750°C.
- D. all (a), (b) and (c). Discuss
- 4. An example of indirectly heated furnace is the
Options- A. soaking pit
- B. muffle furnace
- C. reheating furnace
- D. none of these Discuss
- 5. Which of the following is the most important deterrants to an extended use of pulverised coal in boiler firing?
Options- A. Ash disposal problem.
- B. Excessive fly ash discharge from the stack.
- C. Higher power consumption in its transportation.
- D. Erosion of induced draft fan blades. Discuss
- 6. In a heating process, a heat flow diagram in which the quantities of heat in the various items of a heat balance are represented by the width of a band is called the
Options- A. Ostwald chart
- B. Cox chart
- C. Sankey diagram
- D. none of these Discuss
- 7. Which furnace employs natural draft?
Options- A. Coke oven
- B. Boiler
- C. Rotary kilns
- D. L.D. converter Discuss
- 8. Turndown ratio of a burner gives an idea of the __________ in the furnace.
Options- A. range of fuel firing rates
- B. volume of the combustion chamber
- C. maximum heat input rate only
- D. minimum heat input rate only Discuss
- 9. Regenerators are used for waste heat recovery in
Options- A. by-product coke ovens
- B. beehive coke oven
- C. blast furnace stoves
- D. soaking pits Discuss
- 10. Dampers are located
Options- A. before the I.D fan
- B. after the I.D. fan
- C. near the top of the chimney
- D. anywhere after the I.D. fan Discuss
Furnace Technology problems
Search Results
Correct Answer: heat absorption in radiant section of a furnace.
Correct Answer: 150
Correct Answer: all (a), (b) and (c).
Correct Answer: muffle furnace
Correct Answer: Ash disposal problem.
Correct Answer: Sankey diagram
Correct Answer: Coke oven
Correct Answer: range of fuel firing rates
Correct Answer: by-product coke ovens
Correct Answer: before the I.D fan
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