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 ease with which a material deforms without breaking






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






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


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






5. Failure because of repeated stresses bellow the yield strength






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






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






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






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






10. 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






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






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






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






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






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






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






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






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






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






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






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






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






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






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






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






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






27. 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






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






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






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






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






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






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






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






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






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






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






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






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






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






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






43. 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






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






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






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






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






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






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






50. Materials that can plastically deform without breaking