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 applied load to cross - sectional area






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






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






4. 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






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






6. Materials that can plastically deform without breaking






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






8. The study of crack growth leading to material failure






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






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






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






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






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






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






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


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






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






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






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






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






22. Failure because of repeated stresses bellow the yield strength






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






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






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






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






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






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






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






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






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






32. The ease with which a material deforms without breaking






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






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






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






36. 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






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






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






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






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






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






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






43. 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






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






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






46. 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






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






48. 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






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






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