Virtual Labs

Stress-Strain Curve of Various Materials

1. Which is true for uniaxial tensile engineering stress-strain curve of a polycrystalline aluminum?

a: The curve goes up till yield point and then goes down till fracture Explanation

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b: Yield strength is higher than ultimate tensile strength Explanation

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c: The sample fractures before necking Explanation

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d: The maximum stress is called ultimate tensile strength Explanation

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2. Which is true for uniaxial tensile engineering stress-strain curve of a polycrystalline metal?

a: The toughness of metal is typically higher than ceramics Explanation

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b: The toughness of metal is typically lower than ceramics Explanation

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c: After necking, the deformation is uniform throughout the gauge section Explanation

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d: Before necking, the deformation is non-uniform throughout the gauge section Explanation

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3. Which of the following material will not show necking?

a: Metal Explanation

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b: Thermoplastic polymer Explanation

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c: Ceramic Explanation

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d: All of the above Explanation

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4. “Cold drawing” is associated with which of the following material during stress-strain curve?

a: Metal Explanation

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b: Ceramic Explanation

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c: Polymer Explanation

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d: All of the above Explanation

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5. Which one of the following will typically exhibit lowest strain to failure in stress-strain curve?

a: Polymer Explanation

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b: Metal Explanation

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c: Ceramic Explanation

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d: All of the above Explanation

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6. Which one of the following is true for the stress-strain curve of ceramic material?

a: The stress-strain curve shows large plasticity Explanation

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b: The stress-strain curve shows that material exhibits low toughness Explanation

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c: The stress-strain curve is generally non-linear till fracture Explanation

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d: All of the above Explanation

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