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 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






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






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






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






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






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






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






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






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






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






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






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






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






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






15. 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






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






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






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






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






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






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






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






23. 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






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






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






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






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






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






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






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


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






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






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






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






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






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






37. 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






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






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






40. 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






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






42. Materials that can plastically deform without breaking






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






44. 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






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






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






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






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






49. The study of crack growth leading to material failure






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