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MCQs

Total Questions : 757 | Page 2 of 76 pages
Question 11. Which of the following is a heat treatment furnace?
  1.    Muffle furnace
  2.    Annealing furnace
  3.    Reheating furnace
  4.    Rotary kiln
 Discuss Question
Answer: Option B. -> Annealing furnace
Question 12. An electric furnace producing heat by means of an electric arc struck between each of three electrodes and the charge is called __________ furnace.
  1.    Resistance
  2.    Arc
  3.    Low frequency induction
  4.    None of these
 Discuss Question
Answer: Option B. -> Arc
Question 13. The electric furnace in which heat is produced by a combination of induced current and skin effect is called __________ furnace.
  1.    Arc
  2.    Resistance
  3.    Low frequency induction
  4.    High frequency induction
 Discuss Question
Answer: Option D. -> High frequency induction
Question 14. Calcination of limestone to produce lime is done in a __________ kiln.
  1.    Tunnel
  2.    Rotary
  3.    Vertical shaft
  4.    Both B and C
 Discuss Question
Answer: Option D. -> Both B and C
Question 15. Pot furnace which is either regenerative or recupterative, is used in the manufacture of
  1.    Glass
  2.    Stainless steel
  3.    Potteries
  4.    Refractory bricks
 Discuss Question
Answer: Option A. -> Glass
Question 16. Temperature of a furnace fired with low calorific value fuel gas (i.e. lean gas) can be increased by
  1.    Preheating the combustion air
  2.    Oxygen enrichment of combustion air
  3.    Preheating the fuel gas
  4.    All of the above
 Discuss Question
Answer: Option D. -> All of the above
Question 17. The heating capacity of muffle furnace depends on the
  1.    Surface area & emissivity of the stock
  2.    Properties of the muffle wall (temperature, area, emissivity)
  3.    Both A & B
  4.    Neither A nor B
 Discuss Question
Answer: Option C. -> Both A & B
Question 18. Oxygen enrichment of combustion air does not result in increase of the
  1.    Flame temperature
  2.    Oxygen in the flue gas
  3.    Stack loss
  4.    Heat transfer rate in the furnace
 Discuss Question
Answer: Option B. -> Oxygen in the flue gas
Question 19. Fuel economy in an industrial furnace operation can not be achieved by the use of
  1.    Stoichiometric combustion air
  2.    Non-preheated combustion air
  3.    Combustion air not enriched with oxygen
  4.    Recupterators
 Discuss Question
Answer: Option A. -> Stoichiometric combustion air
Question 20. Size of the combustion chamber of a furnace depends upon the
  1.    Heat release rate of the fuel
  2.    Preheat temperature of fuel & air
  3.    Method of mixing the fuel & air
  4.    All of the above
 Discuss Question
Answer: Option D. -> All of the above

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