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






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






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






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

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






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






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






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






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






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






12. 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






13. 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






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






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






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






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






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






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






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






21. The study of crack growth leading to material failure






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






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






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






25. Materials that can plastically deform without breaking






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






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






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






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






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






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






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






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






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






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






36. 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






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






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






39. 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






40. Failure because of repeated stresses bellow the yield strength






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 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






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






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






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






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






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






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






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






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