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43 Cards in this Set
- Front
- Back
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Which of the following processes use mechanical energy as the principal energy source (threecorrect answers): (a) electrochemical grinding, (b) laser beam machining, (c) conventional milling,(d) ultrasonic machining, (e) water jet cutting, and (f) wire EDM? |
(c), (d), and (e) |
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Ultrasonic machining can be used to machine both metallic and nonmetallic materials: (a) true or(b) false? |
True |
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Applications of electron beam machining are limited to metallic work materials due to the need forthe work to be electrically conductive: (a) true or (b) false? |
False |
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Which one of the following is closest to the temperatures used in plasma arc cutting: (a) 2750°C(5000°F), (b) 5500°C (10,000°F), (c) 8300°C (15,000°F), (d) 11,000°C (20,000°F), or (e) 16,500°C(30,000°F)? |
(d) |
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Chemical milling is used in which of the following applications (two best answers): (a) drillingholes with high depth-to-diameter ratio, (b) making intricate patterns in thin sheet metal, (c)removing material to make shallow pockets in metal, (d) removing metal from aircraft wing panels,and (e) cutting of plastic sheets? |
(c) and (d) |
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Etch factor is equal to which of the following in chemical machining (more than one): (a)anisotropy, (b) CIt, (c) d/u, and (d) u/d; where C = specific removal rate, d = depth of cut, I =current, t = time, and u = undercut? |
(a) and (c) |
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Of the following processes, which one is noted for the highest material removal rates: (a) electricdischarge machining, (b) electrochemical machining, (c) laser beam machining, (d) oxyfuel cutting,(e) plasma arc cutting, (f) ultrasonic machining, or (g) water jet cutting? |
(e) |
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Which one of the following processes would be appropriate to drill a hole with a square crosssection, 0.25 inch on a side and 1-inch deep in a steel workpiece: (a) abrasive jet machining, (b)chemical milling, (c) EDM, (d) laser beam machining, (e) oxyfuel cutting, (f) water jet cutting, or(g) wire EDM? |
(c) |
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Which of the following processes would be appropriate for cutting a narrow slot, less than 0.015inch wide, in a 3/8-in-thick sheet of fiber-reinforced plastic (two best answers): (a) abrasive jetmachining, (b) chemical milling, (c) EDM, (d) laser beam machining, (e) oxyfuel cutting, (f) waterjet cutting, and (g) wire EDM? |
(d) and (f). |
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Which one of the following processes would be appropriate for cutting a hole of 0.003 inchdiameter through a plate of aluminum that is 1/16 in thick: (a) abrasive jet machining, (b) chemicalmilling, (c) EDM, (d) laser beam machining, (e) oxyfuel cutting, (f) water jet cutting, and (g) wireEDM? |
(d) |
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Which of the following processes could be used to cut a large piece of 1/2-inch plate steel into twosections (two best answers): (a) abrasive jet machining, (b) chemical milling, (c) EDM, (d) laserbeam machining, (e) oxyfuel cutting, (f) water jet cutting, and (g) wire EDM? |
(e) and (g) |
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Which of the following are the usual objectives of heat treatment (three best answers): (a) increasehardness, (b) increase melting temperature, (c) increase recrystallization temperature, (d) reducebrittleness, (e) reduce density, and (f) relieve stresses? |
(a), (d), and (f) |
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Of the following quenching media, which one produces the most rapid cooling rate: (a) air, (b)brine, (c) oil, or (d) pure water? |
(b) |
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On which one of the following metals is the treatment called austenitizing be performed: (a)aluminum alloys, (b) brass, (c) copper alloys, or (d) steel? |
(d) |
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The treatment in which the brittleness of martensite is reduced is called which one of the following:(a) aging, (b) annealing, (c) austenitizing, (d) normalizing, (e) quenching, or (f) tempering? |
(f) |
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The Jominy end-quench test is designed to indicate which one of the following: (a) cooling rate, (b)ductility, (c) hardenability, (d) hardness, or (e) strength? |
(c). The reader might be tempted to select (d) because the Jominy test plots hardness as afunction of distance from the quenched surface of the test specimen. However, the reason formeasuring hardness in the Jominy test is to indicate hardenability. |
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In precipitation hardening, the hardening and strengthening of the metal occurs in which one of thefollowing steps: (a) aging, (b) quenching, or (c) solution treatment? |
(a) |
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Which one of the following surface-hardening treatments is the most common: (a) boronizing, (b)carbonitriding, (c) carburizing, (d) chromizing, or (e) nitriding? |
(c) |
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Which of the following are selective surface-hardening methods (three correct answers): (a)austenitizing, (b) electron beam heating, (c) fluidized bed furnaces, (d) induction heating, (e) laserbeam heating, and (f) vacuum furnaces? |
(b), (d), and (e) |
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Which of the following are reasons why workparts must be cleaned in industry (four best answers):(a) to avoid air pollution, (b) to avoid water pollution, (c) to enhance appearance, (d) to enhancemechanical properties of the surface, (e) to improve hygiene conditions for workers, (f) to improvesurface finish, (g) to prepare the surface for subsequent processing, and (h) to remove contaminantsthat might chemically attack the surface? |
(c), (e), (g), and (h) |
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Which of the following chemicals are associated with alkaline cleaning (two correct answers): (a)borax, (b) hydrochloric acid, (c) propane, (d) sodium hydroxide, (e) sulfuric acid, and (f)trichlorethylene? |
(a) and (d) |
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In sand blasting, which one of the following blast media is used: (a) Al2O3, (b) crushed nut shells,(c) nylon beads, (d) SiC, or (e) SiO2? |
(e) |
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Which of the following processes generally produces a deeper penetration of atoms in theimpregnated surface: (a) diffusion or (b) ion implantation? |
(a) |
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Calorizing is the same as which one of the following surface processes: (a) aluminizing, (b) doping,(c) hot sand blasting, or (d) siliconizing? |
(a) |
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Which one of the following plate metals produces the hardest surface on a metallic substrate: (a)cadmium, (b) chromium, (c) copper, (d) nickel, or (e) tin? |
(b) |
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Which one of the following plating metals is associated with the term galvanizing: (a) iron, (b) lead,(c) steel, (d) tin, or (e) zinc? |
(e) |
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Which of the following processes involves electrochemical reactions (two correct answers): (a)anodizing, (b) chromate coatings, (c) electroless plating, (d) electroplating, and (e) phosphatecoatings? |
(a) and (d) |
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With which one of the following metals is anodizing most commonly associated (one answer): (a)aluminum, (b) magnesium, (c) steel, (d) titanium, or (e) zinc? |
(a) |
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Sputtering is a form of which one of the following: (a) chemical vapor deposition, (b) defect in arcwelding, (c) diffusion, (d) ion implantation, or (e) physical vapor deposition? |
(e) |
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Which one of the following gases is the most commonly used in sputtering and ion plating: (a)argon, (b) chlorine, (c) neon, (d) nitrogen, or (e) oxygen? |
(a) |
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The principal methods of applying powder coatings are which of the following (two best answers):(a) brushing, (b) electrostatic spraying, (c) fluidized bed, (d) immersion, and (e) roller coating? |
(b) and (c) |
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Porcelain enamel is applied to a surface in which one of the following forms: (a) liquid emulsion,(b) liquid solution, (c) molten liquid, or (d) powders? |
(d) |
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Hard facing utilizes which one of the following basic processes: (a) arc welding, (b) brazing, (c) dipcoating, (d) electroplating, or (e) mechanical deformation to work harden the surface? |
(a) |
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Welding can only be performed on metals that have the same melting point; otherwise, the metalwith the lower melting temperature always melts while the other metal remains solid: (a) true, (b)false? |
(b). Welding can be accomplished between certain combinations of dissimilar metalsusing solid state welding processes. |
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A fillet weld can be used to join which of the following joint types (three correct answers): (a) butt,(b) corner, (c) edge, (d) lap, and (e) tee? |
(b), (d), and (e) |
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A fillet weld has a cross-sectional shape that is approximately which one of the following: (a)rectangular, (b) round, (c) square, or (d) triangular? |
(d) |
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Groove welds are most closely associated with which one of the following joint types: (a) butt, (b)corner, (c) edge, (d) lap, or (e) tee? |
(a) |
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A flange weld is most closely associated with which one of the following joint types: (a) butt, (b)corner, (c) edge, (d) lap, or (e) tee? |
(c) |
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For metallurgical reasons, it is desirable to melt the weld metal with minimum energy input. Whichone of the following heat sources is most consistent with this objective: (a) high power, (b) highpower density, (c) low power, or (d) low power density? |
(b) |
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The amount of heat required to melt a given volume of metal depends strongly on which of thefollowing properties (three best answers): (a) coefficient of thermal expansion, (b) heat of fusion,(c) melting temperature, (d) modulus of elasticity, (e) specific heat, (f) thermal conductivity, and (g)thermal diffusivity? |
(b), (c), and (e) |
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The heat transfer factor in welding is correctly defined by which one of the following descriptions:(a) the proportion of the heat received at the work surface that is used for melting, (b) the proportionof the total heat generated at the source that is received at the work surface, (c) the proportion of thetotal heat generated at the source that is used for melting, or (d) the proportion of the total heatgenerated at the source that is used for welding? |
(b) |
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The melting factor in welding is correctly defined by which one of the following descriptions: (a)the proportion of the heat received at the work surface that is used for melting, (b) the proportion ofthe total heat generated at the source that is received at the work surface, (c) the proportion of thetotal heat generated at the source that is used for melting, or (d) the proportion of the total heatgenerated at the source that is used for welding? |
(a) |
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Weld failures always occur in the fusion zone of the weld joint, since this is the part of the joint thathas been melted: (a) true, (b) false? |
(b). Failures also occur in the heat-affected zone because metallurgical damage oftenoccurs in this region. |
