Factors Affecting The Type of Fracture MCQ

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• Little deformation takes place in brittle fracture.
  ক

  True

  খ

  False
• All metals fracture in a ductile manner.
  ক

  True

  খ

  False
• Stress during cracking _____ in ductile fracture and _____ in brittle.
  ক

  Increases, increases

  খ

  Increases, decreases

  গ

  Increases, constant

  ঘ

  Decreases, decreases
• Ductile fractured surface appears _____
  ক

  Dull

  খ

  Smooth

  গ

  Bright

  ঘ

  Flat
• How does fracture surface appear in brittle fracture?
  ক

  Rough and dull

  খ

  Smooth and bright

  গ

  Cup and cone

  ঘ

  Fibrous
• Strain energy required in a ductile fracture is ____ and _____ in brittle.
  ক

  Higher, higher

  খ

  Higher, lower

  গ

  Lower, higher

  ঘ

  Lower, lower
• Automobile crankshaft is likely to undergo _____ fracture.
  ক

  Ductile

  খ

  Brittle

  গ

  Intergranular

  ঘ

  Fatigue
• A crack will propagate if the decrease in _____ is at least equal to the energy required to create the new crack surface.
  ক

  Plastic energy

  খ

  Elastic energy

  গ

  Toughness

  ঘ

  Resilience
• In a Charpy test, high hammer velocity ensures ______
  ক

  High strain rate

  খ

  Local stresses

  গ

  Ductility in fracture

  ঘ

  Low stress concentration
• What doesn’t favor a brittle fracture?
  ক

  Tri-axial state of stress

  খ

  A low temperature

  গ

  High strain rate

  ঘ

  Slow rate of loading
• What is more effective for brittle fracture?
  ক

  Spheroids

  খ

  Sharp crack tips

  গ

  Blunted crack tips

  ঘ

  Nodules
• Above equicohesive temperature, material fail in __________
  ক

  Intergranular

  খ

  Ductile fracture

  গ

  Brittle fracture

  ঘ

  Trans granular