Steel Making In Metallurgy MCQ

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• Cobalt in steel
  ক

  increases hardness

  খ

  decreases toughness

  গ

  increases strength

  ঘ

  all of these
• In a good rimming steel
  ক

  both silicon and carbon should be low

  খ

  silicon should be low but carbon should be high

  গ

  both carbon and silicon should be high

  ঘ

  silicon should be high but carbon should be low
• In continuous casting of liquid steel, the mould is made of
  ক

  water cooled steel

  খ

  water cooled copper

  গ

  refractory oxide

  ঘ

  silicon carbide