Furnace Technology MCQs with answers Page - 4

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A

Admin • 802.91K Points
Coach

Q. Temperature of a furnace fired with low calorific value fuel gas (i.e. lean gas) can be increased by

  • (A) Preheating the combustion air
  • (B) Oxygen enrichment of combustion air
  • (C) Preheating the fuel gas
  • (D) All of the above

A

Admin • 802.91K Points
Coach

Q. The heating capacity of muffle furnace depends on the

  • (A) Surface area & emissivity of the stock
  • (B) Properties of the muffle wall (temperature, area, emissivity)
  • (C) Both A & B
  • (D) Neither A nor B

A

Admin • 802.91K Points
Coach

Q. Fuel economy in an industrial furnace operation can not be achieved by the use of

  • (A) Stoichiometric combustion air
  • (B) Non-preheated combustion air
  • (C) Combustion air not enriched with oxygen
  • (D) Recupterators

A

Admin • 802.91K Points
Coach

Q. Oxygen enrichment of combustion air does not result in increase of the

  • (A) Heat transfer rate in the furnace
  • (B) Stack loss
  • (C) Oxygen in the flue gas
  • (D) Flame temperature

A

Admin • 802.91K Points
Coach

Q. Size of the combustion chamber of a furnace depends upon the

  • (A) Heat release rate of the fuel
  • (B) Preheat temperature of fuel & air
  • (C) Method of mixing the fuel & air
  • (D) All of the above

A

Admin • 802.91K Points
Coach

Q. In order to maintain an oxidising atmosphere in a furnace, it should have

  • (A) More of excess air
  • (B) Less of excess air
  • (C) More of CO in flue gas
  • (D) More of CO2 in flue gas

A

Admin • 802.91K Points
Coach

Q. Ceramic coating material for furnace refractory, which increases its emissivity and thus the radiation heat transfer rate in the furnace, comprises of

  • (A) Graphite powder
  • (B) Thoria
  • (C) Zircon powder
  • (D) Beryllium

A

Admin • 802.91K Points
Coach

Q. Which of the following furnaces will have maximum thermal efficiency?

  • (A) Rotary kilns
  • (B) Boiler furnace
  • (C) Walking beam reheating furnace
  • (D) Soaking pits

A

Admin • 802.91K Points
Coach

Q. An example of a periodic furnace is the

  • (A) Rotary kilns
  • (B) Coke oven heating chamber
  • (C) Blast furnace
  • (D) Blast furnace stoves

A

Admin • 802.91K Points
Coach

Q. Blast furnace stoves are meant for heating

  • (A) Blast furnace gas
  • (B) Air
  • (C) Steam
  • (D) None of these

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