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 method used to measure the flexural strength of a sample






2. 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






3. Failure because of repeated stresses bellow the yield strength






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






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






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






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






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






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






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






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






12. The study of crack growth leading to material failure






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






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






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






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






17. 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






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






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






20. 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






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






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






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






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






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






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


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






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






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






30. 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






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






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






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






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






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






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






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






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






39. Materials that can plastically deform without breaking






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






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






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






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






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






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






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






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






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






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






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