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 ratio of the maximum stress to the applied stress






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






3. The ease with which a material deforms without breaking






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






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






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






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






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






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






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






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






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






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






14. 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






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






16. The study of crack growth leading to material failure






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






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






21. 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






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






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






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






25. 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






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






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






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






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


30. Materials that can plastically deform without breaking






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






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






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






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






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






36. 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






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






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






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






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






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






42. Failure because of repeated stresses bellow the yield strength






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






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






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






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






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






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






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






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