Furnace Technology MCQs | Page - 11

Dear candidates you will find MCQ questions of Furnace Technology here. Learn these questions and prepare yourself for coming examinations and interviews. You can check the right answer of any question by clicking on any option or by clicking view answer button.

📊 Furnace Technology
Q. In practical operation of any furnace, zero oxygen percentage or theoretical CO2 percentage in flue gas is rarely achieved, because of
  • (A) Use of non-preheated combustion air
  • (B) Use of pulverised solid fuels
  • (C) Imperfect mixing of fuel & air and infiltration of air
  • (D) Use of excessive positive draft in the furnace
💬 Discuss
✅ Correct Answer: (C) Imperfect mixing of fuel & air and infiltration of air
📊 Furnace Technology
Q. Presence of SO2 in furnace gases attacks the ferrous metal by way of
  • (A) Accelerating the rate of scaling
  • (B) Causing metal embrittlement
  • (C) Attacking the grain boundaries; particularly severe on low carbon and nickel bearing steels at high temperature
  • (D) All of the above
💬 Discuss
✅ Correct Answer: (D) All of the above
📊 Furnace Technology
Q. The main function of a muffle in the muffle furnace is to
  • (A) Protect the charge from the effects of the products of combustion
  • (B) Smooth out temperature inequalities on the combustion side of the muffle wall
  • (C) Both A & B
  • (D) Neither A nor B
💬 Discuss
✅ Correct Answer: (C) Both A & B
📊 Furnace Technology
Q. Which of the following is a periodic furnace?
  • (A) Tunnel kiln
  • (B) Rotary kiln
  • (C) Soaking pit
  • (D) Reheating furnace
💬 Discuss
✅ Correct Answer: (C) Soaking pit
📊 Furnace Technology
Q. Low stack loss indicates the
  • (A) Use of sub-stoichiometric air for combustion
  • (B) Efficient use of fuel
  • (C) Inefficient use of fuel
  • (D) Oxygen enrichment of combustion air
💬 Discuss
✅ Correct Answer: (B) Efficient use of fuel
📊 Furnace Technology
Q. 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.
  • (A) 5
  • (B) 20
  • (C) 40
  • (D) 60
💬 Discuss
✅ Correct Answer: (B) 20
📊 Furnace Technology
Q. Rotary kilns are used in the
  • (A) Calcination of limestone & dolomite
  • (B) Cement manufacture
  • (C) Both A and B
  • (D) Neither A nor B
💬 Discuss
✅ Correct Answer: (C) Both A and B
📊 Furnace Technology
Q. Regenerators are normally provided in the
  • (A) Glass melting furnace
  • (B) Open hearth furnace
  • (C) By product coke ovens
  • (D) All of the above
💬 Discuss
✅ Correct Answer: (D) All of the above
📊 Furnace Technology
Q. In a furnace employing forced draught as compared to induced draught,
  • (A) Air is sucked in, so air leaks are more and hence the furnace efficiency is reduced
  • (B) The fan operates hot and hence blades are liable to corrosion and erosion
  • (C) Positive pressure exists in the furnace
  • (D) None of these
💬 Discuss
✅ Correct Answer: (C) Positive pressure exists in the furnace
📊 Furnace Technology
Q. Coke ovens in steel plant are heated by
  • (A) Electricity
  • (B) Blast furnace gas/mixed gas
  • (C) Coke oven gas
  • (D) Both B and C
💬 Discuss
✅ Correct Answer: (D) Both B and C

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