Furnace Technology MCQs with answers Page - 1

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A

Admin • 802.91K Points
Coach

Q. Overfire burning in a furnace is a phenomenon characterised by

  • (A) Supply of excess fuel
  • (B) Supply of excess air
  • (C) Burning carbon monoxide and other incombustible in upper zone of furnace by supplying more air
  • (D) None of these

A

Admin • 802.91K Points
Coach

Q. Which of the following variables does not affect the furnace capacity?

  • (A) Size of the furnace
  • (B) Gas velocity in furnace
  • (C) Ratio of wall surface to surface of stock
  • (D) None of these

A

Admin • 802.91K Points
Coach

Q. __________ is an indirectly heated furnace.

  • (A) Open hearth furnace
  • (B) Muffle furnace
  • (C) Soaking pit
  • (D) Reheating furnace

A

Admin • 802.91K Points
Coach

Q. Reducing atmosphere is maintained in a

  • (A) Calcination kiln
  • (B) Blast furnace
  • (C) Soaking pit
  • (D) L.D. converter

A

Admin • 802.91K Points
Coach

Q. Thermal efficiency of a limestone calcination rotary kiln may be around __________ percent.

  • (A) 20
  • (B) 40
  • (C) 65
  • (D) 80

A

Admin • 802.91K Points
Coach

Q. If fuel and air are mixed ahead of the burner, it is called a/an __________ burner.

  • (A) Premix
  • (B) Outside mixing type
  • (C) Rotary
  • (D) Diffusion

A

Admin • 802.91K Points
Coach

Q. Out of the following fuels used in a furnace exhausting flue gas at a temperature of 600°C, the percentage stack loss will be maximum in case of complete combustion of

  • (A) Furnace oil with air
  • (B) Furnace oil with oxygen
  • (C) Blast furnace gas with air
  • (D) Blast furnace gas with oxygen

A

Admin • 802.91K Points
Coach

Q. Protective gas used in the annealing furnace for steel coil comprises of

  • (A) 95% N2 + 5% H2
  • (B) 5% H2 + 95% N2
  • (C) 100% CO
  • (D) 100% H2

A

Admin • 802.91K Points
Coach

Q. __________ furnace is not an electric furnace.

  • (A) Arc
  • (B) Resistance
  • (C) Induction
  • (D) Pot

A

Admin • 802.91K Points
Coach

Q. In reverberatory furnace, charge is heated mainly by

  • (A) Conduction
  • (B) Natural convection
  • (C) Radiation of heat from the roof of the combustion chamber
  • (D) None of these

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