11. The given figure below represents stress vs strain curve for two different material, in this case which material has

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11 The Given Figure Below Represents Stress Vs Strain Curve For Two Different Material In This Case Which Material Has 1 (35.81 KiB) Viewed 19 times

11 The Given Figure Below Represents Stress Vs Strain Curve For Two Different Material In This Case Which Material Has 2 (62.83 KiB) Viewed 19 times

11. The given figure below represents stress vs strain curve for two different material, in this case which material has greater modulus of elasticity Stress M2 Stress M1 12. 0 Strain 이 Strain A. Modulus of elasticity of M1 is greater than M2 B. Modulus of elasticity of M1 is less than M2 C. Both M1 and M2 have same modulus of elasticity D. None of the above Material 1 has hardness of 50 HRB and material 2 has hardness of 50 HRC. It can be concluded that material 1 is less hard than material 2. A True B. False Which of the following statements is incorrect: A. Materials of high ductility tend to be relatively soft. B. The ductility decreases as the hardness of the material increase, C. Hard materials have the tendency to be brittle. D. Toughness tends to decrease with the increase in hardness. E. None of the above in hund naciman is tested 13

3. ch 6 Q1 Multiple Choice Problems 1 Some metals, show a dramatic ductile to brittle transition with increasing material temperature A True B. False 2 The secondary state has constant creep due to: A. The competing result of the strain hardening and necking B. The competing result of the strain hardening and recovery C. The competing result of the recovery and necking D. The strain hardening, E Necking More the material is brittle, larger will be its strength and it will absorb relatively very less energy prior to failure. A True B. False Which of the following is not of the factors that affect the fatigue resistance of metals: A bad design B. rough surface C. corrosion D. residual stresses E. None of the above 5 Creep test is carried out with a dynamic stress under elevated temperature. A True B. False 6. The primary state of the creep curve represents the creep rate in the strain vs. time curve. A. Increasing B. Decreasing C. Constant D. fluctuating 7. In creep test because of the increase in temperature the initial load, which had caused only deformation within the elastic range eventfully had caused failure to the specimen A. True B. False 8. Which of the following is a constant for materials: A. Modulus of Elasticity B. Stress C. True Strain D. Load E. None of the above 9. To allow for a factor of safety usually designer works at: A. 20% of the value of Oy B. 20% of the value of OUTS C. 20% of the value of o D. 50% of the value of Oy E 50% of the value of OUTS 10. Applying a standard impact test using Charpy method generally gives a higher toughness reading than using Izod method for the same material. A True B. False