Furnace Technology MCQs with answers Page - 2

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A

Admin • 802.91K Points
Coach

Q. Main gas valve in a gaseous fuel burner is a __________ valve.

  • (A) Gate
  • (B) Butterfly
  • (C) Globe
  • (D) None of these

A

Admin • 802.91K Points
Coach

Q. Ingress of cold air in the furnaces through cracks, charging doors, openings etc.

  • (A) Reduces the flue gas temperature and makes the furnace atmosphere oxidising
  • (B) Increases the load on the induced draft fan
  • (C) Reduces the furnace draught
  • (D) All of the above

A

Admin • 802.91K Points
Coach

Q. Which furnace employs an I.D. fan for the removal of flue gases from the furnace?

  • (A) Coke oven
  • (B) Blast furnace stoves
  • (C) Beehive coke oven
  • (D) High pressure boiler

A

Admin • 802.91K Points
Coach

Q. The function of an economiser in a boiler is to preheat the

  • (A) Feedwater
  • (B) Combustion air
  • (C) Pulverised coal
  • (D) Furnace oil

A

Admin • 802.91K Points
Coach

Q. __________ atmosphere is maintained inside an iron blast furnace.

  • (A) Oxidising
  • (B) Reducing
  • (C) Inert
  • (D) Decarburising

A

Admin • 802.91K Points
Coach

Q. Scaling of furnace stock is reduced by __________ in flue gas.

  • (A) CO
  • (B) H2
  • (C) High CO/CO2
  • (D) All of the above

A

Admin • 802.91K Points
Coach

Q. Cement Kiln is a

  • (A) Rotary Kiln
  • (B) Tunnel Kiln
  • (C) Natural draft furnace
  • (D) Batch furnace

A

Admin • 802.91K Points
Coach

Q. Which is a regenerative furnace?

  • (A) Coke oven heating chamber
  • (B) Open hearth furnace
  • (C) Both A and B
  • (D) Neither A nor B

A

Admin • 802.91K Points
Coach

Q. Dampers are located

  • (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

A

Admin • 802.91K Points
Coach

Q. Decarburisation of steel

  • (A) Is the removal of carbon from iron carbide (Fe3C)
  • (B) Affects its crystalline structure
  • (C) Is favoured by CO2
  • (D) All of the above

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