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






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






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






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






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






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






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






8. 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






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






10. 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






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






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






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






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






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






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






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






18. 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






19. The study of crack growth leading to material failure






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






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






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






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






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






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






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






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






28. 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






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






30. The ease with which a material deforms without breaking






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






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






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






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






35. Failure because of repeated stresses bellow the yield strength






36. 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






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






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






39. 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






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






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






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






43. Materials that can plastically deform without breaking






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






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


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






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






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






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






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