Mechanical Metallurgy Practice Test 5

1. For calculating the modulus of rupture from the thin-walled hollow cylinder, the diameter to wall thickness ratio should be in the order of __________

2. The true local necking strain is defined as __________

3. The unit of Brinell hardness number is ____________

4. The Rockwell hardness number unit is equal to __________

5. For the given specimen the necking will begin when the true strain is equal to __________

6. The typical test temperature in the hot torsion testing is _________

7. As the temperature increases, the difference between the strength of a notched sample and un-notched sample ____________

8. The Brinell Hardness measurement is a concept based on __________

9. The stress vs. strain relationship is given for material at temperature T1, T2, T3. The correct order of temperature will be _____

10. The following graph shows the change in hardness with the variation of the temperature of the material. There is an abrupt change in the slope of the line. This cannot be due to ____________