Virtual Labs

1. What is instrumented indentation technique?

a: That measures hardness and Young’s modulus during indentation of material Explanation

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b: That provides only hardness of material during indentation of material Explanation

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c: That provides only elastic modulus during indentation of material Explanation

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d: That records instantaneous load vs displacement during indentation of material Explanation

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2. How is hardness defined?

a: Hardness is defined as resistance of material against wear and erosion Explanation

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b: Hardness is defined as resistance of material against indentation, scratch and plastic deformation Explanation

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c: Hardness is defined as resistance of material against corrosion Explanation

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d: Hardness is defined as resistance of material against passage of electrical current Explanation

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3. How is hardness calculated?

a: Hardness = Load / Area Explanation

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b: Hardness = Load × Area Explanation

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c: Hardness = Stress / Strain Explanation

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d: Hardness = Stress ×Strain Explanation

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4. How is Young’s modulus defined?

a: Young’s modulus is defined as the maximum strength of material before fracture Explanation

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b: Young’s modulus is defined as the strength of material at yield point Explanation

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c: Young’s modulus is defined as the ratio of stress to strain in the linearly elastic region of stress-strain curve Explanation

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d: Young’s modulus is defined as the slope of stress to that of strain in the stress-strain curve before failure Explanation

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5. What is nanoindentation?

a: Nanoindentation is the indentation when load is in the order of ~100s nN (nano-Newtons) Explanation

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b: Nanoindentation is the indentation when displacement depth load is in the order of ~100s nm (nano-meters) Explanation

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c: Nanoindentation is the indentation when duration of dwell time of the indenter at maximum load is in the order of ~100s ns (nano-seconds) Explanation

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d: Nanoindentation is the indentation when the measurement time is in the order of ~100s ns (nano-seconds) Explanation

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Instrumented Indentation of Materials