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 method used to measure the flexural strength of a sample






2. 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






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






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






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






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






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






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






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






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






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






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


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






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






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






16. 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






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






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






19. Materials that can plastically deform without breaking






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






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






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






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






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






25. 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






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






27. The study of crack growth leading to material failure






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






29. 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






30. 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






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






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






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






34. Failure because of repeated stresses bellow the yield strength






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






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






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






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






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






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






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






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






43. The ease with which a material deforms without breaking






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






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






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






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






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






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






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