Multiple Choices NO: 1

There are 20 correct answers in the following multiple choice questions (some questions have multiple\nanswer(a).s that are correct). To attain a perfe

There are 20 correct answers in the following multiple choice questions (some questions have multiple

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answer(a).s that are correct). To attain a perfect score on the quiz, all correct answers must be given. Each

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correct answer is worth 1 point. Each omitted answer or wrong answer reduces the score by 1 point, and

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each additional answer beyond the correct number of answers reduces the score by 1 point. Percentage score

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on the quiz is based on the total number of correct answers.

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28.1 Which of the following are reasons why workparts must be cleaned in industry (four best answers):

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(a) to avoid air pollution, (b) to avoid water pollution, (c) to enhance appearance, (d) to enhance

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mechanical properties of the surface, (e) to improve hygiene conditions for workers, (f) to improve

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surface finish, (g) to prepare the surface for subsequent processing, and (h) to remove contaminants

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that might chemically attack the surface?

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28.2 Which of the following chemicals are associated with alkaline cleaning (two correct answers): (a)

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28.3 In sand blasting, which one of the following blast media is used: (a) Al2O3, (b) crushed nut shells,

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(c) nylon beads, (d) SiC, or (e) SiO2?borax, (b)

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28.4 Which of the following processes generally produces a deeper penetration of atoms in the

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impregnated surface: (a) diffusion or (b) ion implantation?

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28.5 Calorizing is the same as which one of the following surface processes: (a) aluminizing, (b) doping,

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(c) hot sand blasting, or (d) siliconizing?

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28.9 Which one of the following plate metals produces the hardest surface on a metallic substrate: (a)

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cadmium, (b) chromium, (c) copper, (d) nickel, or (e) t28.3 In sand blasting, which one of the following blast media is used: (a) Al2O3, (b) crushed nut shells,

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(c) nylon beads, (d) SiC, or (e) SiO2?

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28.10 Which one of the following plating metals is associated with the term galvanizing: (a) iron, (b) lead,

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(c) steel, (d) tin, or (e) zinc?

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28.11 Which of the following processes involves electrochemical reactions (two correct answers): (a)

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anodizing, (b) chromate coatings, (c) electroless plating, (d) electroplating, and (e) phosphate

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coatings?

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28.12 With which one of the following metals is anodizing most commonly associated (one answer): (a)

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aluminum, (b) magnesium, (c) steel, (d) titanium, or (e) zinc?

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28.13 Sputtering is a form of which one of the following: (a) chemical vapor deposition, (b) defect in arc

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welding, (c) diffusion, (d) ion implantation, or (e) physical vapor deposition?

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28.14 Which one of the following gases is the most commonly used in sputtering and ion plating: (a)

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argon, (b) chlorine, (c) neon, (d) nitrogen, or (e) oxygen?

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28.15 The principal methods of applying powder coatings are which of the following (two best answers):

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(a) brushing, (b) electrostatic spraying, (c) fluidized bed, (d) immersion, and (e) roller coating?

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28.16 Porcelain enamel is applied to a surface in which one of the following forms: (a) liquid emulsion,

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(b) liquid solution, (c) molten liquid, or (d) powders?

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28.17 Hard facing utilizes which one of the following basic processes: (a) arc welding, (b) brazing, (c) dip

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coating, (d) electroplating, or (e) mechanical deformation to work harden the surface?

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