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






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






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






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






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






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






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






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






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






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






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






12. Materials that can plastically deform without breaking






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






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






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






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






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






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






19. The ease with which a material deforms without breaking






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






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






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






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






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






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






26. 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






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






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






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






30. The stage in which the rate that dislocations propagate equals the rate at which the dislocations are blocked - resulting in a fairly linear region on the strain - time plot






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






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






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






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






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






36. 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






37. Failure because of repeated stresses bellow the yield strength






38. The study of crack growth leading to material failure






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






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






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






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






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






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






45. 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






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






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






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






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






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