t/f Casting is used on metal and polymer parts for near-net shape manufacturing (limited shaping and forming).
Added by Jorge G.
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Casting is a manufacturing process where a liquid material (usually metal or polymer) is poured into a mold and allowed to solidify, forming a part with a specific shape. Show more…
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Which of the following is NOT an example of an additive manufacturing process? a) Stereolithography (SLA) b) Laminated Object Manufacturing (LOM) c) Fused Deposition Modeling (FDM) d) Selective Laser Sintering (SLS) e) All of the above are examples of additive manufacturing processes. 2. Which of the following is NOT a benefit of additive manufacturing? a) Geometrical design freedom b) Anisotropic properties due to effects of layer stacking c) Maximum material savings d) Reduction of development times e) For some processes, full or near full-density of functional parts. 3. The pattern that determines the geometry of the casting in expendable mold processes is usually made oversized, the same size, or undersized relative to the dimensions of the casting. 4. A misrun is which one of the following defects in casting? a) Globules of metal becoming entrapped in the casting b) Metal is not properly poured into the downsprue c) Metal solidifies before filling the cavity d) Microporosity e) None of the above. 5. Bulk density is less than, greater than, or equal to the true density.
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24. Polyurethane plastics can be made into flexible foams even though they belong to thermosetting polymers. True or False? 25. Which of the following is NOT an advantage of extrusion compared to other plastic molding processes? a. Low cost per pound b. Continuous c. Limited complexity of parts d. Good mixing 26. In extrusion, which of the following processes can reduce the thickness of an extruded part? a. All of the above 27. Which of the following is NOT an advantage of using aluminum rather than tool steel to make cavities for injection molds? a. Lower initial cost due to lower machining time b. Shorter delivery time c. More even heat distribution d. Can be anodized to achieve hardness
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