HW1 Sol (revised)

HW1 Sol (revised) - UCLA MAE 183 HW#1 Solutions Fall 2010...

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1 UCLA MAE 183 HW#1 Solutions – Fall 2010 Review Q 1.2: What is a capital good? Provide an example. Answer . Capital goods are those purchased by other companies to produce goods or supply services. Examples of capital goods are aircraft and construction equipment. Review Q 1.5: Name the three basic categories of materials. Answer . (1) Metals, (2) ceramics, and (3) polymers. A fourth category, composites, is a non- homogeneous mixture of the other types and therefore is not a basic category. Review Q 1.7: What are two subclasses of assembly processes? Provide an example process for each subclass. Answer . Permanent joining and mechanical fastening. Examples of permanent joining include welding or adhesive bonding. Examples of mechanical fastening include threaded fasteners, such as nuts and bolts, and rivets. Review Q 1.Extra1 (not in the textbook): What is the main advantage of having “slip” for manufacturing? What is the main disadvantage? Answer . Advantage: Slip causes materials to be more ductile and therefore easier to shape. Disadvantage: Slip also correlates to a decrease in strength. Multiple Choice Q 1.3: Inventions of the Industrial Revolution include which one of the following: (a) automobile, (b) cannon, (c) printing press, (d) steam engine, or (e) sword? Answer . (d). Multiple Choice Q 1.5: Which one of the following engineering materials is defined as a compound containing metallic and nonmetallic elements: (a) ceramic, (b) composite, (c) metal, or (d) polymer? Answer . (a). Multiple Choice Q 1.6: Which of the following processes start with a material that is in a fluid or semi-fluid state and solidifies the material in a cavity (two best answers): (a) casting, (b) forging, (c) machining, (d) molding, (e) pressing, and (f) turning? Answer . (a) and (d). Multiple Choice Q 1.9: Which one of the following is a machine used to perform extrusion: (a) forge hammer, (b) milling machine, (c) rolling mill, (d) press, or (e) torch? Answer . (d). Review Q 2.2: Which elements are the noble metals? Answer . Copper, silver, and gold.
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