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






2. 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






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






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






5. 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






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






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






8. 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






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






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






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






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






13. 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






14. The study of crack growth leading to material failure






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






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






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






18. The ease with which a material deforms without breaking






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






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






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






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






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






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






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






26. Materials that can plastically deform without breaking






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






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






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






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






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






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






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






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






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






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






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






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






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






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






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






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






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






44. 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






45. 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






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






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






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






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






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