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






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






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






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






5. 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






6. 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






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






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






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






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






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






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






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






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






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






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






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






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






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






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






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






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






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






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






25. 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






26. 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






27. The ease with which a material deforms without breaking






28. A method used to determine the tensile strength - breaking strength - and the yield strength of a 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. The first stage of creep - during which dislocations in a material slip and move around obstacles






31. Failure because of repeated stresses bellow the yield strength






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






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






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






35. 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






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






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






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






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






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






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






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






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






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






45. Materials that can plastically deform without breaking






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


47. The study of crack growth leading to material failure






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






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






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