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






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






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






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






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






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






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






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






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






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






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






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






14. The study of crack growth leading to material failure






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






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






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






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






19. The ease with which a material deforms without breaking






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






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






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






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






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






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






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






27. 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






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






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






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






31. 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






32. Materials that can plastically deform without breaking






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






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






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






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






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






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






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






40. 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






41. 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






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


43. 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






44. 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






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






46. Failure because of repeated stresses bellow the yield strength






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






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






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






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