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






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






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






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






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






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






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






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






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






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






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






14. The ease with which a material deforms without breaking






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






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






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






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






19. 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






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






21. The study of crack growth leading to material failure






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






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






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






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






26. 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






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






28. 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






29. 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






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






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






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






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






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






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


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






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






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






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






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






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






42. Failure because of repeated stresses bellow the yield strength






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






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






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






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






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






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






49. 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






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