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






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






3. 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






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






5. 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






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






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






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






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






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






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






12. 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






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






14. 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






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






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






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






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






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






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






21. The ease with which a material deforms without breaking






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






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






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






25. Failure because of repeated stresses bellow the yield strength






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






27. 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






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






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


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






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






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






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






34. 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






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






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






37. 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






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






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






40. The study of crack growth leading to material failure






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






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






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






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






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






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






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






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






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






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