SKM754C-69-17102513290_0002.jpg - 3pt 3pt 3pt 4pt I AM ‘f “(L g ’4 l ”lab/7h 5"”‘6 far 5‘5” l’ ‘5{Law J PM ‘7 f E3 $3:3 Cl ’

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Unformatted text preview: 3pt 3pt 3pt 4pt .- I AM ‘f “(L g ’4 l ”lab/7h 5"”‘6 far 5‘5” l’" ‘5 {Law J PM ‘7 f? E3} $3 :3 Cl ’ é“ 1' k 2pt 3pt ME 467 Exam 1 Fall 2017 NAME: 1. In investment casting, how is the wax removed from the mold or shell? Circle all correct answers. a) The molten metal mixes in with the wax as it is melted, with the wax becoming part of the final product. b) The molten metal vaporizes the wax in the mold as it is poured in. (:6): The mold is heated in an oven where the wax is melted out. 2. Which of the processes below requires all of the mold to be destroyed every time a new part is made? Circle all correct answers. a. Die casting bl; Sand casting c Investment casting E, Expanded polystyrene or ‘lost foam’ casting e. Compression molding 3. Which of these processes do NOT use a mold? Circle all correct answers. a; Polymer sheet extrusion bf Polymer Spinning c. Extrusion blow molding d. Injection blow molding 4. What is the maximum air pressure that is exerted on a vacuum molded part during its fabrication? Explain your answer for full credit. (c i1?) Pa 760 we; 5. A drawing shows a length to be “2.500 mm +0.000/— 0.050mm”. This notation represents which measurement characteristic? There is one best answer. f ,: . La/ Unilateral tolerance b. Bilateral tolerance 0. Limit dimensions (1. Unidirectional dimensions 6. Which metal(s) are commonly used for parts made from die casting? Circle all correct answers. (gy Zinc b) Steel l'c) Aluminum v. y’d)? Brass L; Page 2 of 13 ...
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