Interfacial Defects MCQ

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• Which dimension defect are interfacial defects?
  ক

  2 dimension

  খ

  1 dimension

  গ

  3 dimension
• What will be the interfacial energy for domain wall?
  ক

  Greatest compared to other interfacial defects

  খ

  Least compared to other interfacial defects

  গ

  Less than external surface but more than other interfacial defects
• Interfacial defect does not include which of the following defect?
  ক

  Grain boundary

  খ

  Twin boundary

  গ

  Phase boundary
• Volume defect or bulk defects are which dimension defect?
  ক

  1 dimension

  খ

  2 dimension

  গ

  3 dimension
• Which type of boundary causes a constant angle of tilt between lattice planes of the same type in adjacent regions of the sample?
  ক

  Twinning boundary

  খ

  Tilt boundary

  গ

  Grain boundary
• What is the density of polycrystalline specimen virtually identical to?
  ক

  Singe crystal of different material

  খ

  Single crystal of same material

  গ

  Different crystal of different material
• Which type of boundary exists in multiphase materials across which there is a sudden change in physical/chemical properties?
  ক

  Phase boundary

  খ

  Chain folded layer

  গ

  Domain wall
• In polymeric material the surface of which type of layer is considered to be an interfacial defect?
  ক

  Chain ends

  খ

  Short side branches

  গ

  Main chain unit
• At room temperature what is an approximate order of vibration frequency in vibration per second?
  ক

  1013

  খ

  1010

  গ

  104
• Annealing twins which are found in metal have which type of crystal structure?
  ক

  BCC

  খ

  FCC

  গ

  HCP