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






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






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






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






5. 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






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






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






8. Failure because of repeated stresses bellow the yield strength






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






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






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






12. 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






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






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






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






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






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






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






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






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






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






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






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






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






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






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






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






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






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






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






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






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






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






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


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






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






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






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






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






40. The study of crack growth leading to material failure






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






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






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






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






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






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






47. 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






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






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






50. 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