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






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






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






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






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






6. The study of crack growth leading to material failure






7. 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






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






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






10. The application of stresses parallel to a crack causing the top portion to be pushed forward and the bottom portion to be pulled in the opposite direction






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






12. 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






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






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






15. Materials that can plastically deform without breaking






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






17. Failure because of repeated stresses bellow the yield strength






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






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






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






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






23. The ease with which a material deforms without breaking






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






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






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






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






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






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






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


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






32. 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






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






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






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






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






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






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






39. 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






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






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






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






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






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






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






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






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