MATLS 1M03 - WebCT - Assignment 6 - Try 2

MATLS 1M03 - WebCT - Assignment 6 - Try 2 - WebCT Quiz...

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http://webct.mcmaster.ca/SCRIPT/MATLS_1M03_T2_07/scripts/student. .. 1 of 6 4/6/2007 5:11 AM View Results Name: AARON MURENBEELD Attempt: 2 / 3 Out of: 13 Started: April 6, 2007 12:48am Finished: April 6, 2007 5:11am Time spent: 4 hr, 22 min., 18 sec. Question 1 (1 point) Which of the following groups only includes refractory metals ? Student response: Correct Response Student Response Answer Choices a. Niobium, molybdenum, iron, and aluminum. b. Molybdenum, tantalum, and copper. c. Tungsten, tantalum, copper, and titanium. d. Niobium, molybdenum, tungsten, and tantalum. General feedback: Niobium , molybdenum , tungsten , and tantalum are the refractory metals. For more information, see the section on Nonferrous Alloys in the text. Score: 1 / 1 Question 2 (1 point) True or False? Casting operations are only used for metals which have low ductilities such that hot or cold working would be difficult. Student response: Correct Response Student Response Answer Choices a. True b. False General feedback: False . Casting is also used as the final step in refining ductile metals, for manufacturing complicated shapes, and when it is the most cost-effective option. For more information, see the section on Casting in the text. Score: 1 / 1 Question 3 (1 point) The smaller the surface area to mass ratio of a specimen. . . Student response: Correct Response Student Response Answer Choices a. ... the slower the cooling rate and shallower the hardening effect. b. ... the slower the cooling rate and deeper the hardening effect. c. ... the faster the cooling rate and shallower the hardening effect. d. ... the faster the cooling rate and deeper the hardening effect. General feedback: The smaller the surface area to mass ratio of a specimen, the slower the cooling rate , and consequently, the shallower the hardening effect . For more information, see the section on
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MATLS 1M03 - WebCT - Assignment 6 - Try 2 - WebCT Quiz...

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