1M03 2009 ASSIGNMENT 6-3 ¿¯

1M03 2009 ASSIGNMENT 6-3...

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View Results Name: SOO NAM Attempt: 3 / 3 Out of: 20 Started: April 4, 2009 9:11pm Finished: April 4, 2009 9:39pm Time spent: 27 min. 39 sec. Student finished 479 hr, 32 min., 21 sec. ahead of the 28800 min. time limit. Question 1 (1 point) True or False? On the basis of specific strength , aluminum alloys are stronger than steel alloys. Student response: Correct Response Student Response Answer Choices a. True b. False General feedback: True . On the basis of specific strength, aluminum alloys are stronger than steel alloys. The densities of aluminum alloys (about 2.7 g/cm 3 ) are much lower than for steel alloys (about 7.8 g/cm 3 ). For more information, see the section on Nonferrous Alloys in the text. Score: 1 / 1 Question 2 (1 point) True or False? For precipitation hardening, artificial aging is carried out at room temperature whereas natural aging is carried out at an elevated temperature. Student response: Correct Response Student Response Answer Choices a. True b. False General feedback: False . Just the reverse is true: Artificial aging is carried out at an elevated temperature whereas nat aging is carried out at room temperature . For more information, see the section on Precipitation Hardening in the text. Score: 1 / 1 Question 3 (1 point) Consider a steel alloy which has a carbon composition less than the eutectoid composition. How many degrees above the upper critical temperature would you heat the alloy to fully anneal it? Student response: Correct Response Student Response Answer Choices a. 10 to 25°C b. 15 to 40°C c. 25 to 50°C d. 35 to 70°C e. 55 to 85°C General feedback: For more information, see the section on Annealing Processes in the text. Score: 0 / 1 Question 4 (1 point)
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What term is used to describe a geometric isomer that has atoms or atom groups positioned on opposite sides of two dou bonded carbons? Student response:
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1M03 2009 ASSIGNMENT 6-3...

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