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The stress-strain curves are drawn for two different materials X and Y. It is observed that the ultimate strength point and the fracture point are close to each other for material X but are far apart for material Y. We can say that materials X and Y are likely to be (respectively):

1. Plastic and ductile
2. Ductile and brittle
3. Brittle and ductile
4. Brittle and plastic

Correct answer: Brittle and ductile

Solution

Material X, with ultimate strength and fracture points close together, is brittle as it breaks without significant deformation. Material Y, with these points far apart, is ductile as it undergoes significant deformation before breaking.

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