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 study of crack growth leading to material failure






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






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






4. 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






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






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






7. 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






8. Materials that can plastically deform without breaking






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






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






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






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






13. 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






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






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






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






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






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






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






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






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






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






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






24. 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






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






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






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






29. Failure because of repeated stresses bellow the yield strength






30. The area contained under the elastic portion of a stress - strain curve - which represent how much energy the material can absorb before permanently beforming






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






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






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






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






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


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






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






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






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






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






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






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






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






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






45. 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






46. The ease with which a material deforms without breaking






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






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






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






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