Test your basic knowledge |

Modern Material Science And Engineering 4

Subject : engineering
Instructions:
  • Answer 50 questions in 15 minutes.
  • If you are not ready to take this test, you can study here.
  • Match each statement with the correct term.
  • Don't refresh. All questions and answers are randomly picked and ordered every time you load a test.

This is a study tool. The 3 wrong answers for each question are randomly chosen from answers to other questions. So, you might find at times the answers obvious, but you will see it re-enforces your understanding as you take the test each time.
1. A period used to force the same aging processes to occur on a sample in a shorter amount of time






2. The amount of flexural stress a material can withstand before breaking. measured through the bend test






3. Stress values not involving the presence of stress raisers in the material






4. The ease with which a material deforms without breaking






5. The transition of some metals in which a change in temperature causes them to transform between ductile and brittle behavior






6. A method used to measure the flexural strength of a sample






7. Method used to determine fatigue by alternating compressive and tensile forces on the sample






8. The region on a stress - strain curve in which no permanent changes to the material occur






9. Failure because of repeated stresses bellow the yield strength






10. A specific method of measuring the resistance of a materials surface to penetration by a hard object under a static force






11. One of the many scales used to evaluate the resistance of a materials surface to penetration by a hard object under static force






12. A statistical table based on the degrees of freedom and the level of uncertainty in a set of reported sample values






13. A nonlinear - qualitative scaled used to evaluate the resistance of a materials surface to penetration by a hard object






14. The stress level below which there is a 50% probability that failure will never occur






15. A value used to characterized creep based on time - temperature - and material- specific constants






16. The sudden decrease in cross - sectional area of a region of a sample under a tensile load






17. Cracks - voids - and other inperfections in a material that cause highly localized increases in stress






18. The number of cycles at a given stress level that a material can experience before failing






19. A single blow test names after Charpy in which a notched test sample is broken by a swinging pendulum






20. The ratio of the maximum stress to the applied stress






21. A method used to determine the tensile strength - breaking strength - and the yield strength of a sample






22. A limit placed on the accuracy of a reported mean - based on the number of samples tested - the standard deviation - and the desired level of confidence






23. Stresses that act perpendicularly to the direction of the crack - causing the crack ends to pull apart and opening the crack further






24. Test that approximate the impact of an environmental variable on a material over time by exposing the material to a higher level of that variable for shorter times






25. A value used to determine if two distinct sets of examples are statistically different






26. A method used to measure the resistance of the surface of a material to penetration by a hard object under a static force






27. The value that the stress concentration factor must exceed to allow a crack to propogate






28. The stress at the highest applied force on a stress - strain curve






29. The square root of the variance. this value provides more knowledge about the distance from the mean a random sample is likely to be






30. The degree of certainty in an estimate of a mean






31. The area contained under the elastic portion of a stress - strain curve - which represent how much energy the material can absorb before permanently beforming






32. Term that accounts for the increased stress applied to an elliptical crack whose length is much greater than its width






33. The study of crack growth leading to material failure






34. An impact test similar to the charpy test in which the sample is aligned vertically with the notch facing away from the hammer






35. The application of stresses parallel to a crack causing the top portion to be pushed forward and the bottom portion to be pulled in the opposite direction






36. The final stage of creep - during which the rate of deformations accelerates rapidly and continues until rupture






37. The change in the slope of the strain - time plot at any given point during a creep test






38. A statistical quantity that takes into account the random error from a variety of sources and provides infromation about the spread of the data






39. The ratio of the elastic energy to the strain at yielding - which determines how much energy will be used for deformation and how much will be translated to motion






40. A property defining a materials resistance to a blow that is measured by an impact test






41. The fracture toughness above the critical thickness in which the width of the material no longer impacts the fracture toughness






42. Plastic deformation of a material under stress at elevated temperatures; occurs due to dislocations in the material






43. Materials that can plastically deform without breaking






44. The amount of energy lost as the test sample is destroyed during an impact test






45. The first stage of creep - during which dislocations in a material slip and move around obstacles






46. The application of stress perpendicular to a crack - wich pulls the top and bottom potions in opposite directions






47. An estimate of the transition between elastic stretching and plastic deformation for a material without a linear region stress - strain curve






48. The stress at the point of transition between elastic stretching and plastic deformation






49. Relates the longitudinal deformation and the lateral deformation of material under stress


50. The stress at which the material breaks completely during tensile testing