Furnace Technology MCQs with answers Page - 7

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A

Admin • 831.35K Points
Coach

Q. Oxygen percentage in the flue gas coming out of a gaseous fuel fired furnace should be ideally about __________ percent.

  • (A) < 2
  • (B) < 5
  • (C) < 8
  • (D) < 10

A

Admin • 831.35K Points
Coach

Q. Hearth furnaces are not used for

  • (A) Roasting
  • (B) Melting
  • (C) Reheating
  • (D) None of these

A

Admin • 831.35K Points
Coach

Q. The heating capacity of continuous reheating furnace depends upon the

  • (A) Hearth area and furnace temperature
  • (B) Emissivity of the stock
  • (C) Ratio of wall surface to stock surface
  • (D) All of the above

A

Admin • 831.35K Points
Coach

Q. Means for giving direction to the circulation of gases in furnaces are

  • (A) Fans
  • (B) Arrangement of heating stock in the furnaces
  • (C) Location of outlet ports and heating & combustion devices
  • (D) All of the above

A

Admin • 831.35K Points
Coach

Q. The thermal efficiency of an air/fuel gas preheating recuperator may be as high as __________ percent.

  • (A) 50
  • (B) 65
  • (C) 85
  • (D) 99

A

Admin • 831.35K Points
Coach

Q. Advantages of use of preheated combustion air are

  • (A) Saving in fuel consumption
  • (B) Reduction in scale losses
  • (C) Increase in flame temperature
  • (D) All of the above

A

Admin • 831.35K Points
Coach

Q. In salt bath furnace, heat is transferred to the charge mainly by

  • (A) Convection
  • (B) Conduction
  • (C) Radiation
  • (D) None of these

A

Admin • 831.35K Points
Coach

Q. Which of the following is a batch furnace?

  • (A) Cupola
  • (B) Reheating furnace
  • (C) Glass tank furnace
  • (D) None of these

A

Admin • 831.35K Points
Coach

Q. Which of the following is a rotary furnace?

  • (A) Lime kiln
  • (B) Soaking pit
  • (C) Stoves
  • (D) Annealing furnace

A

Admin • 831.35K Points
Coach

Q. Large tonnage of refractory bricks are dried in a

  • (A) Shaft furnace
  • (B) Rotary hearth furnace
  • (C) Tunnel kiln
  • (D) Muffle furnace

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