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MCQs

Total Questions : 46 | Page 5 of 5 pages
Question 41. Pure iron exists in ________ allotropic forms.
  1.    One
  2.    Two
  3.    Three
  4.    Four
 Discuss Question
Answer: Option C. -> Three
Answer: (c).Three
Question 42. Heating of 4.8% cast iron at _______ results in the formation of liquid metal.
  1.    450°C
  2.    650°C
  3.    950°C
  4.    1450°C
 Discuss Question
Answer: Option D. -> 1450°C
Answer: (d).1450°C
Question 43. In this figure, what does O denote?In This Figure, What Does O Denote?
  1.    Melting point
  2.    Boiling point
  3.    Triple point
  4.    Vaporization point
 Discuss Question
Answer: Option C. -> Triple point
Answer: (c).Triple point
Question 44. Transformation of hypoeutectic cast iron is applicable for the composition of cast iron of ________ carbon.
  1.    2.0-4.3%
  2.    4.3%
  3.    4.3-5.0%
  4.    Over 5%
 Discuss Question
Answer: Option A. -> 2.0-4.3%
Answer: (a).2.0-4.3%
Question 45. What is the line QR in this fooling curve known as?What Is The Line QR In This Fooling Curve Known As?
  1.    Latent heating line
  2.    Eutectic compound system
  3.    Binary solid
  4.    Horizontal thermal arrest
 Discuss Question
Answer: Option D. -> Horizontal thermal arrest
Answer: (d).Horizontal thermal arrest
Question 46. What microconstituent of iron-carbon alloys does this diagram illustrate?What Microconstituent Of Iron-carbon Alloys Does This Diagra...
  1.    Pearlite
  2.    Austenite
  3.    Cementite
  4.    Sorbite
 Discuss Question
Answer: Option D. -> Sorbite
Answer: (d).Sorbite

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