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






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






3. 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






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






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






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






7. Materials that can plastically deform without breaking






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






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






10. 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






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






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






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






14. 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






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






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






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. 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






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






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






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






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






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






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






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






27. The ease with which a material deforms without breaking






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






29. Failure because of repeated stresses bellow the yield strength






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






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






32. 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






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






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






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






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


37. 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






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






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






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






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






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






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






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






45. The study of crack growth leading to material failure






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






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






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






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






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