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Q: Which of the following material does not undergo large deformation before fracture ?
  • A. Copper
  • B. Aluminum
  • C. Cast iron
  • D. Steel
Correct Answer: Option C - • Brittle materials show little deformation before fracture and failure occurs suddenly without any warning i.e. it is the property of breaking without much permanent distortion. • Normally if elongation is less than 5% the material is brittle. E.g. cast iron, glass ceramics are typical brittle materials. • Material that undergo large deformations (strains) before fracture (failure) are called ductile material. Examples–Low-carbon steel (mild steel), copper alloys, molybdenum, zinc, aluminium, steel etc.
C. • Brittle materials show little deformation before fracture and failure occurs suddenly without any warning i.e. it is the property of breaking without much permanent distortion. • Normally if elongation is less than 5% the material is brittle. E.g. cast iron, glass ceramics are typical brittle materials. • Material that undergo large deformations (strains) before fracture (failure) are called ductile material. Examples–Low-carbon steel (mild steel), copper alloys, molybdenum, zinc, aluminium, steel etc.

Explanations:

• Brittle materials show little deformation before fracture and failure occurs suddenly without any warning i.e. it is the property of breaking without much permanent distortion. • Normally if elongation is less than 5% the material is brittle. E.g. cast iron, glass ceramics are typical brittle materials. • Material that undergo large deformations (strains) before fracture (failure) are called ductile material. Examples–Low-carbon steel (mild steel), copper alloys, molybdenum, zinc, aluminium, steel etc.