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 determine the tensile strength - breaking strength - and the yield strength of a sample






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






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






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






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






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






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. Materials that can plastically deform without breaking






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






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






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






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






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






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






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






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






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






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






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






21. 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






22. The ease with which a material deforms without breaking






23. 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






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






25. The study of crack growth leading to material failure






26. Failure because of repeated stresses bellow the yield strength






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


28. 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






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






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






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






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






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






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






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






36. 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






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






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






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 stress at the highest applied force on a stress - strain curve






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






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






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






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






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






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






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






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






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






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