The strain energy stored in a spring when subjected to greatest load without being permanently distorted, is called A. Stiffness B. Proof resilience C. Proof stress D. Proof load

The correct answer is: B. Proof resilience

Proof resilience is the strain energy stored in a spring when subjected to the greatest load without being permanently distorted. It is a measure of the spring’s ability to absorb energy without being damaged.

Stiffness is the resistance of an object to deformation under an applied force. It is a measure of how difficult it is to bend, stretch, or compress an object.

Proof stress is the maximum stress that a material can withstand without permanent deformation. It is a measure of the material’s strength.

Proof load is the load that causes a material to reach its proof stress. It is a measure of the material’s load-bearing capacity.