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 the maximum stress to the applied stress






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






3. 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






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






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






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






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






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






9. The study of crack growth leading to material failure






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 ease with which a material deforms without breaking






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






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






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






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






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






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






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






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






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






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






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






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






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






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






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






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






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






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






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






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






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






34. 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






35. 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






36. Materials that can plastically deform without breaking






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






38. 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






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






40. Failure because of repeated stresses bellow the yield strength






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






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






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






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






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






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






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


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






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






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