Iron Making In Metallurgy MCQ

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• The product of a commercial direct reduction process is
  ক

  liquid iron

  খ

  solid

  গ

  sponge iron

  ঘ

  iron saturated with carbon
• Iron is
  ক

  paramagnetic

  খ

  dielectric

  গ

  ferroelectric

  ঘ

  ferromagnetic
• Solution loss reaction occurs
  ক

  in the blast furnace shaft

  খ

  during pretreatment of hot metal

  গ

  in the LD process

  ঘ

  during deoxidation in the ladle
• Blast furnace is a
  ক

  counter-current reactor

  খ

  co-current reactor

  গ

  cross-current reactor

  ঘ

  combination of all the three
• Dephosphorisation of molten pig iron is favoured by
  ক

  oxidising and basic slag

  খ

  reducing and basic slag

  গ

  high activity co-efficient of phosphorous in metal

  ঘ

  oxidising and neutral slag