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Q: At yield point of a test piece, the material ..........
  • A. obeys Hooke's law
  • B. behaves in an elastic manner
  • C. regains its original shape on removal of the load
  • D. undergoes plastic deformation
Correct Answer: Option D - • Before yield point, material behave in an elastic manner. • At end beyond yield point, material undergoes plastic deformation.
D. • Before yield point, material behave in an elastic manner. • At end beyond yield point, material undergoes plastic deformation.

Explanations:

• Before yield point, material behave in an elastic manner. • At end beyond yield point, material undergoes plastic deformation.