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Q: The ability of a material to change its shape under load without cracking and to retain this shape after the load is removed is known as :
  • A. hardness
  • B. elasticity
  • C. brittleness
  • D. plasticity
Correct Answer: Option D - Plasticity– It is the ability of material to change its shape under load without cracking and to retain this shape after the load is removed some of the examples of plastic materials are PVC, nylon, polythene etc. Hardness– It is usually defined as resilience of a material to penetration hard material resist scratches or being worn out by friction with another body. • It is primarily a functions of the elastic limit of the material and to a lesser extent a function of the work hardening coefficient.
D. Plasticity– It is the ability of material to change its shape under load without cracking and to retain this shape after the load is removed some of the examples of plastic materials are PVC, nylon, polythene etc. Hardness– It is usually defined as resilience of a material to penetration hard material resist scratches or being worn out by friction with another body. • It is primarily a functions of the elastic limit of the material and to a lesser extent a function of the work hardening coefficient.

Explanations:

Plasticity– It is the ability of material to change its shape under load without cracking and to retain this shape after the load is removed some of the examples of plastic materials are PVC, nylon, polythene etc. Hardness– It is usually defined as resilience of a material to penetration hard material resist scratches or being worn out by friction with another body. • It is primarily a functions of the elastic limit of the material and to a lesser extent a function of the work hardening coefficient.