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






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






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






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






5. The ease with which a material deforms without breaking






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






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






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






9. The study of crack growth leading to material failure






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






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






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






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






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






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






16. 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






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






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






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






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






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






22. 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






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






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






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






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






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






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






29. Failure because of repeated stresses bellow the yield strength






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






31. 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






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






33. 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






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






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






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






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






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






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






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






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






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






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


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






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






46. 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






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. Materials that can plastically deform without breaking






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






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