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Q: A material is said to be perfectly elastic if..........
  • A. It regains its original shapes on removal of the load
  • B. It regains its original shape partially on removal of the load
  • C. It does not regain its original shape at all
  • D. None of these
Correct Answer: Option A - Elastic material – If a substance regains its original shape after removing the load. It is called elastic material. Plastic material – If a substance does not regain its original shape after removing the load it is called plastic material.
A. Elastic material – If a substance regains its original shape after removing the load. It is called elastic material. Plastic material – If a substance does not regain its original shape after removing the load it is called plastic material.

Explanations:

Elastic material – If a substance regains its original shape after removing the load. It is called elastic material. Plastic material – If a substance does not regain its original shape after removing the load it is called plastic material.