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






2. The ease with which a material deforms without breaking






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






4. 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






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






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






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






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






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






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






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






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






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






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






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






16. Failure because of repeated stresses bellow the yield strength






17. The ratio of applied load to cross - sectional area






18. The study of crack growth leading to material failure






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






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






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






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






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






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






25. The slope of the stress - strain curve in the elastic region. aka Young's Modulus and Tensile Modulus






26. A curve plotting the results of testing multiple samples at different stress levels that used to to determine the fatigue life of a material at a given stress level






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






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






29. Materials that fail completely at the onset of plastic deformation. these materials have linear stress - strain curves






30. The region on the stress - strain curve in which the material has experienced a change from which it will not completely recover






31. A period used to force the same aging processes to occur on a sample in a shorter amount of time






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






33. A ratio of the force applied to a sample and the instantaneous length of the chain to the initial length of the chain






34. Guidelines published by the American Society for Testing and Materials that provide detailed testing procedures to ensure that tests performed in different laboratories are directly comparable






35. A property determined by measuring the change in the length of a sample to initial length of the sample






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






37. The stage in which the rate that dislocations propagate equals the rate at which the dislocations are blocked - resulting in a fairly linear region on the strain - time plot






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






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






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






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






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






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






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






45. Materials that can plastically deform without breaking






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






47. 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






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






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






50. The resistance of the surface of a material to penetration by a hard object under static force