Section B: Fill in the Blank (answer all questions) 1 point each in the Bubble s

Question

Section B: Fill in the Blank (answer all questions) 1 point each in the Bubble sheets for questions 016 to 041 using the words from the indicated Word Bank (WB or WB2) on the following page. You can separate the page with Q16 wb1 is a fixed abrasive process, while the word banks on it, if you like) process.Q18 wb1i grinding wheel bond. Q17 wb2 is a loose abrasive is a common grinding grit material. 19 wb2 is a type of In the sheet metal process called 20 wb1 springback is a significant concern. is a method used to compensate for springback. In the sheet metal process called 2wb2 called 022 wbt _the In the sheet metal operation called- Q23-wb2_ wrinkling is a significant sheet metal operation called Q24_wb1 considered scrap, whereas in the operation called 25 wb1 the slug is the product. The inside edge of a sheet metal bend experiences Q26 wb2-- the the workpiece gets significantly longer and thinner, but not much wider. concern. In the the slug of material removed from the sheet is desired Q26_wb2stresses, while Q2 7.wb2 stress condition s on the outside edge may induce metal tearing/cracking forging is called The thin section of metal that remains at the parting line of the dies in closed die between the die and the workpiece called Q28_wb2 In open die forging. 29 wb_ causes the ends of the workpiece to expand less than the middle, a phenomenon 930 wb1 Hot forging takes place at a temperature that is higher than wb2 temperature. The small circles that can be seen on a part made by _Q32, wb2__ are indicators of the positions of the ejector pins 33 wb1is an example of the reinforcement material in a composite, while is an example of the matrix material. Q34 wb Page 6 MEGR 2180 July 19, 2018

Explanation / Answer

Barreling is a fixed abrasive process ,while grinding is a loose abrasive process aluminium oxide is a common grinding grit material.Resinoid is a type of grinding wheel bond.

In sheet metal process called Bending,springback is a significant concern.Over bending is a method to compensate for springback.In the sheet metal process called Rolling the work piece is significantly longer and thinner ,but not much wider .In sheet metal operation called punching wrinkling is a significant concern.In the sheet metal operation called Blanking ,the slug of the material removed from the sheet considered scrap ,where as in the operation called punching the slug is the desired product.The inside of a sheet metal bend experiences compressive stresses,while the marginal stress conditions on the outside edge may induce metal tearing cracking.

The thin section of metal that remains at the parting line of the dies in closed die forging is called Flash.in open die forging friction between the die and the workpiece causes the ends of the workpiece to expand less than the middle,a phenomenon called Deep Drawing.Hot forging takes place at a temperature that is higher then the melting temperature.The small circles that can be seen on a part made by sand casting are indicators of the positions of ejector pins.

Carbon fibre is an example of the reinforcement material in a composite while graphite is an example of the matrix material

Economics is the study of the llocation of scarce resources hat have alternative uses.Costs associated with prior decisons are called prior costs.The cost of producing one more component is called marginal cost.The intrest rate that makes the PW of the benifits = the PW of the costs is called the rate of return .Costs that are proportional to the number of units produced are called Break Even costs,while those that ate the same regardless of the number of units produced are called Fixed costs.costs like janatorial services that are difficut to a particular part are called variable.

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