mid1sol - Department of Mechanical Engineering, Yeditepe...

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Unformatted text preview: Department of Mechanical Engineering, Yeditepe University ME 342 MACHINE ELEMENTS I – Namik Ciblak MIDTERM EXAM I, Spring 2008 NAME:_______________SOLUTIONS___________________________Time: 120 Minutes Open books and notes. Four questions on one page. Q.1 . (10%) Answer the following questions as true (T) or false (F). CIRCLES ONLY . I. Design is as art as it is science. T F II. Synthesis is one of the activities found in design process. T F III. The Internet is a very reliable information source. T F IV. CAE is part of a greater set of tools called CAD. T F V. ASME is an organization that also sets ethical codes for mechanical engineering professionals. T F VI. A designer should always avoid using large tolerances. T F VII. Brittleness is a temperature dependent material property. T F VIII. If carbon steel is strained beyond its elastic limit, its modulus of elasticity will change due to the process of cold-working. T F IX. Heat treatment always increases the strength properties of steels. T F X. Unlike thermoplastics, thermoset plastics can be remolded. T F Q.2. (10%) Fill in the table below. Material y S /(mass density) MPa/(kg/m 3 ) y ut S S / Carbon Steel AISI 1030 CD 0.056 1.182 Carbon Steel AISI 1030 Q&T @540 °C 0.066 1.294 Cast Aluminum, 335.0-T7 0.091 1.056 Titanium Alloy, Ti-6Al-4V 0.188 1.084 Table Readings: Material...
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mid1sol - Department of Mechanical Engineering, Yeditepe...

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