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 method used to measure the flexural strength of a sample






2. 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






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






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






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






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






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






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






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






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






11. 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






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






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






14. Failure because of repeated stresses bellow the yield strength






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






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






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






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






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






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






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






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






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






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






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






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






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






28. 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






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






30. 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






31. The study of crack growth leading to material failure






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






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






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






35. Materials that can plastically deform without breaking






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


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






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






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






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






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






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






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






44. The ease with which a material deforms without breaking






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






46. 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






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






48. 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






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






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