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 which the material breaks completely during tensile testing






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






3. 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






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






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






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






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






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






9. The study of crack growth leading to material failure






10. 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






11. The ease with which a material deforms without breaking






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






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






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






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






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






17. 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






18. 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






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






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






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






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






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






26. 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






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






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






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






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






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






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






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






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






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






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






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






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






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






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






41. Failure because of repeated stresses bellow the yield strength






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






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






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






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






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






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






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






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






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