Virtual Labs

1. If the maximum load during tensile test is 100 N and the original cross sectional area of the sample is 1 mm², then the maximum engineering stress is:

a: 100 MPa Explanation

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b: 10 MPa Explanation

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c: 1 MPa Explanation

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d: 0.1 MPa Explanation

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2. If the engineering stress at a given point in stress-strain curve is 100 MPa and the engineering strain is 0.1, then the true stress at that point is:

a: 101 MPa Explanation

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b: 100 MPa Explanation

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c: 100.1 MPa Explanation

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d: 110 MPa Explanation

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3. It is given that a sample of cross sectional area 100 mm², is reduced to 45 mm² at fracture, calculate the percentage reduction in area.

a: 45 Explanation

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b: 55 Explanation

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c: 25 Explanation

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d: 75 Explanation

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4. Which of the following is TRUE for tensile testing of medium carbon steel?

a: It does not show UTS Explanation

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b: It does not show failure Explanation

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c: It shows abrupt transition from elastic to plastic region Explanation

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d: It shows brittle behavior Explanation

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5. Luder bands are formed?

a: After lower yield point Explanation

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b: After ultimate tensile strength Explanation

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c: Between ultimate tensile strength and fracture Explanation

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d: In elastic regime Explanation

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