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Doctors Medicines MCQs Q&A

Match the items in column 1 and column 2 and choose the correct combination. Column 1 Column 2 A - Resilience 1 – Ability of the material to return to the original shape when load is removed B – Fatigue 2 – Capacity of a material to absorb energy elastically C – Stiffness 3 – Ability of material to absorb a certain amount of energy without failure D - Elasticity 4 – Resistance of the material to elastic deformation   5 – Failure of material at loads less than that at normal conditions  

Match the items in column 1 and column 2 and choose the correct combination. Column 1 Column 2 A - Resilience 1 – Ability of the material to return to the original shape when load is removed B – Fatigue 2 – Capacity of a material to absorb energy elastically C – Stiffness 3 – Ability of material to absorb a certain amount of energy without failure D - Elasticity 4 – Resistance of the material to elastic deformation   5 – Failure of material at loads less than that at normal conditions   Correct Answer A - 2, B - 5, C - 4, D - 1 

Concept:

The correct match is,

Resilience - Capacity of a material to absorb energy elastically

Fatigue - Failure of material at loads less than that at normal conditions

Stiffness - Resistance of the material to elastic deformation

Elasticity - Ability of the material to return to the original shape when the load is removed

Resilience

  • It is the total strain energy stored in a given volume of material within the elastic limit.
  • On removal of a load, this energy is released. In other words, it is the area under the load-deflection curve within the elastic limit.

Fatigue

  • When a material is subjected to repeated stresses, it fails at stresses below the yield point stresses. Such type of failure of a material is known as fatigue.

Stiffness

  • Stiffness of a material is the resistance offered to deformation, below the elastic limit. 
  • A material with a high value of Young’s modulus E is stiffer than the material with the lower value of Young’s modulus.
  • Small values of E indicate flexible materials and a large value of E reflects stiffness and rigidity.

Elasticity 

  • The elasticity of a metal is its power of returning to its original shape after the applied force is released.
  • Properly heat-treated spring is a good example of elasticity.

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