Question

Which of the following statements are correct? 

A. Malleability is the ability of a material to absorb strain energy till the elastic limit. 
B. Toughness is the ability of a material to absorb energy till the rupture. 
C. Resilience is the area under the load deformation curve within the elastic limit. 
D. Stress-strain diagram of highly brittle material has no plastic zone. 
Choose the most appropriate answer from the options given below:

• A. A, B and C only
• B. B, C and D only
• C. A, C and D only
• D. A, B and D only

Hint:

Malleability relates to plastic compression; Ductility to plastic tension; Resilience to elastic energy; Toughness to total energy until fracture.

Answer 1

The Correct Option is B

Step 1: Evaluate each statement.
- (A) Incorrect: Malleability is the ability to withstand plastic deformation under compression (hammering into sheets), not limited to elastic energy.
- (B) Correct: Toughness is the capacity to absorb energy up to fracture (entire stress-strain area).
- (C) Correct: Resilience is the elastic energy stored, i.e., the area under the stress-strain curve up to the elastic limit.
- (D) Correct: Brittle materials fracture almost immediately after the elastic limit, showing negligible/no plastic zone.

Step 2: Conclusion.
Correct set of statements = (B, C, D).