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 defining a materials resistance to a blow that is measured by an impact test






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






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






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






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






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






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






8. 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






9. The ease with which a material deforms without breaking






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






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


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






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






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






15. 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






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






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






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






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






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






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






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






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






24. 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






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






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






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






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






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






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






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






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






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






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






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






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






37. Materials that can plastically deform without breaking






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






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






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






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






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






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






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






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. Failure because of repeated stresses bellow the yield strength






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






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






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






50. 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