EDT 123
A circular sheet-metal slug produced in a hole punching operation will have the same diameter as the : Select one: a. die opening b. punch
a
Which of the following materials has the highest specific heat: Select one: a. aluminum b. concrete c. polyethylene d. water
d
Which one of the metallic elements is the most abundant on the earth: Select one: a. aluminum b. copper c. iron d. magnesium e. silicon
a
A high tooling cost and/or tool change time will tend to (a) decrease, (b) have no effect on, or (c) increase the cutting speed for minimum cost? Select one: a. decrease cutting speed for minimum cost b. have no effect on the cutting speed for minimum cost c. increase the cutting speed for minimum cost
a
When cutting a ductile work material, an increase in cutting speed will generally (a) degrade surface finish or (b) improve surface finish? Select one: a. degrade surface finish b. improve surface finish
b
Which one of the following elements is the most important alloying ingredient in steel: Select one: a. carbon b. chromium c. nickel d. vanadium e. molybdenum
a
Which one of the following metals would usually have the lowest unit horsepower in a machining operation: Select one: a. aluminum b. brass c. cast iron d. steel
a
Copper is a relatively easy metal to weld because its thermal conductivity is high: Select one: a. true b. false
b
Copper is generally considered easy to weld because of its high thermal conductivity: Select one: a. true b. false
b
Cupolas are furnaces used to melt which of the following metals (one best answer): Select one: a. aluminum b. cast iron c. steel d. zinc
b
Which one of the following manufacturing processes will likely result in the best surface finish: Select one: a. welding b. grinding c. machining d. sand casting e. sawing
b
Which one of the following materials has the highest hardness: Select one: a. aluminum oxide b. cubic boron c. high-speed steel d. titanium carbide e. tungsten carbide
b
Which one of the following metals has the lowest density: Select one: a. aluminum b. magnesium c. tin d. titanium
b
Which one of the following plate metals produces the hardest surface on a metallic substrate: Select one: a. cadmium b. chromium c. copper d. nickel e. tin
b
The ability of a positioning system to return to a previously defined location is measured by which of the following terms: Select one: a. accuracy b. control resolution c. repeatability
c
With which one of the following geometric forms is the drilling operation most closely associated: Select one: a. external cylinder b. flat plane c. round hole d. screw threads e. sphere
c
The two most popular polymer foams are which of the following: Select one or more: a. polyacetal b. polyethylene c. polystyrene d. polyurethane
c, d
Turbulence during pouring of the molten metal is undesirable for which of the following reasons (two best answers): Select one or more: a. it causes discoloration of the mold surfaces b. it dissolves the binder used to hold together the sand mold c. it increases erosion of the mold surface d. it increases the formation of metallic oxides that can become entrapped during solidification e. it increases mold filling time
c, d
A tap is a cutting tool used to create which one of the following geometries: Select one: a. external threads b. flat planar surfaces c. holes used in beer kegs d. internal threads Correct e. square holes
d
Impregnation refers to which of the following (two best answers): Select one or more: a. filling the pores of the PM part with a molten metal b. putting polymers into the pores of a PM part c. soaking oil by capillary action into the pores of a PM part
b, c
Which three of the following industries are classified as secondary industries? (three correct answers) Select one or more: a. mining b. financial services c. fishing d. transportation e. power utilities f. publishing g. beverages
e, f, g
A machinability rating greater than 1.0 indicates that the work material is (a) easier to machine than the base metal or (b) more difficult to machine than the base metal, where the base metal has a rating = 1.0? Select one: a. easier to machine b. more difficult to machine
a
A shrink fit assembly is accomplished by the following process: Select one: a. heat the outer part, cool the inner part & assemble b. heat the inner part, cool the outer part and press together c. press the parts together at room temperature d. screw the inner part into the outer part
a
A stepper motor is which one of the following types of devices: Select one: a. actuator b. interface device c. pulse counter d. sensor
a
The strength and hardness of steel increases as carbon content (a) increases or (b) decreases? Select one: a. increases b. decreases
a
Ultrasonic machining can be used to machine both metallic and nonmetallic materials: Select one: a. true b. false
a
Which of the following is typical of the starting work geometry in sheet metal processes: Select one: a. high volume-to-area ratio b. low volume-to-area ratio
a
Which one of the following molding processes is the most important in the production of products made of conventional rubber: Select one: a. compression molding b. injection molding c. thermoforming d. transfer molding
a
A lathe can be used to perform which of the following machining operations (three correct answers): Select one or more: a. boring b. broaching c. drilling d. milling e. turning
a, c, e
Which of the following are sections of a conventional extruder barrel for thermoplastics (three best answers): Select one or more: a. compression section b. die section c. feed section d. heating section e. metering section
a, c, e
Which of the following are sections of a conventional extruder barrel for thermoplastics (three best answers): Select one or more: a. compression section b. heating section c. feed section d. die section e. metering section
a, c, e
Which of the following are the usual objectives of heat treatment (three best answers): Select one or more: a. increase hardness b. increase melting temperature c. reduce brittleness d. reduce density e. relieve stresses
a, c, e
An increase in cobalt content has which of the following effects on WC-Co cemented carbides (two best answers): Select one or more: a. decreases hardness b. decreases transverse rupture strength c. increases hardness d. increases toughness e. increases wear resistance
a, d
As an alloying ingredient in high-speed steel, tungsten serves which of the following functions (two best answers): Select one or more: a. forms hard carbides to resist abrasion b. improves strength and hardness c. increases corrosion resistance d. increases hot hardness e. increases toughness
a, d
The coefficient of friction between the part and the tool in cold working tends to be (a) higher, (b) lower, or (c) no different relative to its value in hot working? Select one: a. higher b. lower c. no different
b
The flow curve expresses the behavior of a metal in which of the following regions of the stress-strain curve: Select one: a. elastic region b. plastic region
b
The forward movement of polymer melt in an extruder barrel is resisted by drag flow, which is caused by the resistance to flow through the die orifice: Select one: a. true b. false
b
The particle size that can pass through a screen is obtained by taking the reciprocal of the mesh count of the screen: Select one: a. true b. false
b
The term "laser" stands for "light actuated system for effective reflection": Select one: a. true b. false
b
Which of the following is the most important cast iron commercially: Select one: a. ductile cast iron b. gray cast iron c. malleable iron d. white cast iron
b
Which one of the following abrasive materials is most appropriate for grinding hardened tool steel: Select one: a. aluminum oxide b. cubric boron nitride c. diamond d. silicon carbide
b
A flange weld is most closely associated with which one of the following joint types: Select one: a. butt b. corner c. edge d. lap e. tee
c
A steel with 1.0% carbon is known as which one of the following: Select one: a. eutectoid b. hypoeutectoid c. hypereutectoid d. wrought iron
c
The most important rubber product is which one of the following: Select one: a. footwear b. conveyor belts c. pneumatic tires d. tennis balls
c
A fillet Weld has a cross-sectional shape that is approximately which one of the following: Select one: a. rectangular b. round c. square d. triangular
d
During solidification of an alloy when a mixture of solid and liquid metals is present, the solid-liquid mixture is referred to as which one of the following: Select one: a. eutectic composition b. ingot segregation c. liquidus d. mushy zone e. solidus
d
How many atoms are there in the face-centered cubic (FCC) unit cell (one correct answer) Select one: a. 10 b. 12 c. 8 d. 14 e. 9
d
Which one of the following metals has the lowest melting point: Select one: a. aluminum b. lead c. magnesium d. tin e. zinc
d
Which of the following manufacturing processes are classified as material removal processes (two correct answers): Select one or more: a. drawing b. extrusion c. forging d. grinding e. machining
d, e
A lathe is primarily used to perform which one of the following manufacturing operations: Select one: a. broaching b. drilling c. lapping d. milling e. turning
e
Groove welds are most closely associated with which one of the following joint types: Select one: a. butt b. corner c. edge d. lap e. tee
a
Of the following cutting conditions, which one has the greatest effect on tool wear: Select one: a. cutting speed b. depth of cut c. feed
a
Machining is never used for rapid prototyping because it takes too long: Select one: a. true b. false
b
Metals that are easiest to weld in resistance welding are ones that have low resistivities to electrical current: Select one: a. true b. false
b
In foundry work, a runner is which one of the following: Select one: a. channel in the mold leading from the downsprue to the main mold cavity b. foundryman who moves the molten metal to the mold c. vertical channel into which molten metal is poured into the mold
a
In general, which one of the following materials has the highest machinability: Select one: a. aluminum b. copper c. low carbon steel d. stainless steel e. unhardened tool steel
a
In precipitation hardening, the hardening and strengthening of the metal occurs in which one of the following steps: Select one: a. aging b. quenching c. solution treatment
a
In robotics, spray-painting applications are classified as which of the following: Select one: a. continuous path operation b. point-to-point operation
a
In sand casting, the volumetric size of the pattern is: Select one: a. bigger than the cast part b. the same size as the cast part c. smaller than the cast part d. impossible to calculate
a
Knurling is performed on a lathe, but it is not a metal cutting operation: Select one: a. true b. false
a
Most sheet metalworking operations are performed as which one of the following: Select one: a. cold working b. hot working c. warm working
a
Oxyacetylene welding is the most widely used oxyfuel welding procesas because acetylene mixed with an equal volume of oxygen burns hotter than any other commercially available fuel: Select one: a. true b. false
a
Repressing refers to a pressworking operation used to compress a sintered part in a closed die to achieve closer sizing and better surface finish: Select one: a. true b. false
a
Sand casting is which one of the following types: Select one: a. expendable mold b. permanent mold c. all of the above
a
Solid solution alloying is the principle strengthening mechanism in high-strength alloy (HSLA) steels: Select one: a. true b. false
a
Surface texture is included within the scope of surface integrity: Select one: a. true b. false
a
The Plastic Region of the stress-strain curve for a metal is characterized by a proportional relationship between stress and strain: Select one: a. false b. true
a
The basic structural unit of matter is which one of the following: Select one: a. atom b. element c. molecule d. nucleus e. electron
a
The feature that distinguishes fusion welding from solid-state welding is that melting of the faying surfaces occurs during fusion welding but not in solid-state welding: Select one: a. true b. false
a
The function of the ejection system is which one of the following: Select one: a. separate the part from the cavity after molding b. move polymer melt into the mold cavity c. open the mold halves after the cavity is filled d. remove the molded parts from the runner system after molding
a
The standard coordinate system for numerical control machine tools is based on which one of the following: Select one: a. Cartesion coordinates b. cylindrical coordinates c. polar coordinates
a
The term encapsulation refers to which one of the following plastics shaping processes: Select one: a. casting b. compression molding c. extrusion of hollow forms d. vacuum thermoforming
a
The term weldability takes into account not only the ease with which a welding operation can be performed, but also the quality of the resulting weld: Select one: a. true b. false
a
The thermal expansion properties of polymers are generally (a) greater than, (b) less than, or (c) the same as those of metals? Select one: a. greater than b. less than c. equal to
a
The twist drill is the most common type of drill bit: Select one: a. true b. false
a
The upper half of a sand-casting mold is called which of the following: Select one: a. cope b. drag c. sprue d. runner e. pattern
a
Total solidification time is defined as which one of the following: Select one: a. time between pouring and complete solidification b. time between pouring and cooling to room temperature c. time between solidification and cooling to room temperature d. time to give up the heat of fusion
a
Which of the following processes generally produces a deeper penetration of atoms in the impregnated surface: Select one: a. diffusion b. ion implantation
a
Which of the following would tend to give higher material removal rates: Select one: a. larger grain size b. smaller grain size
a
Which one of the following abrasive materials is most appropriate for grinding steel and cast iron: Select one: a. aluminum oxide b. cubic boron nitride c. diamond d. silicon carbide
a
With which one of the following metals is anodizing most commonly associated (one answer): Select one: a. aluminum b. magnesium c. steel d. titanium e. zinc
a
Which of the following are advantages and characteristics of hot working relative to cold working (four correct answers): Select one or more: a. fracture of the workpart is less likely b. friction is reduced c. isotropic mechanical properties d. lower deformation forces required e. more significant shape changes are possible
a, c, d, e
Which of the following alloying elements are most commonly associated with stainless Steel (two best answers): Select one or more: a. chromium b. manganese c. molybdenum d. nickel e. tungsten
a, d
Which of the following processes involves electrochemical reactions (two correct answers): Select one or more: a. anodizing b. chromate coatings c. electroless plating d. electroplating e. phosphate coatings
a, d
Which of the following two geometric terms have the same meaning: Select one or more: a. circularity b. concentricity c. cylindricity d. roundness
a, d
Which one of the following metals would typically be used in die casting (three best answers): Select one or more: a. aluminum b. cast iron c. steel d. tin e. zinc
a, d, e
From the standpoint of assembly cost, it is more desirable to use many small threaded fasteners rather than a few large ones: Select one: a. true b. false
b
High-volume production of assembled products is most closely associated with which one of the following layout types: Select one: a. cellular layout b. product layout c. process layout d. fixed position layout
b
How many minutes are required to cure (vulcanize) a modern passenger car tire: Select one: a. 5 minutes b. 15 minutes c. 25 minutes d. 45 minutes
b
If strain measurements were made during a tensile test, which of the following would have the higher value: Select one: a. true strain b. engineering strain
b
In casting, a flask is which one of the following: Select one: a. beverage bottle for foundrymen b. box which holds the cope and drag c. container for holding liquid metal d. metal which extrudes between the mold halves
b
In the heating of most metal alloys, melting begins at a certain temperature and concludes at a higher temperature. In these cases, which of the following temperatures marks the beginning of melting: Select one: a. liquidus b. solidus
b
Inventions of the Industrial Revolution include which one of the following: Select one: a. automobile b. steam engine c. cannon d. sword e. printing press
b
Mining is classified in which of the following industry categories? Select one: a. secondary industry b. primary industry c. manufacturing industry d. service industry e. agricultural industry
b
Of the following abrasive materials, which one has the highest hardness: Select one: a. aluminum oxide b. cubic boron nitride c. silicon carbide
b
Of the following quenching media, which one produces the most rapid cooling rate: Select one: a. air b. brine c. oil d. pure water
b
Of the following rubber additives, which one would rank as the single most important: Select one: a. antioxidants b. carbon black c. clays and other hydrous aluminum silicates d. plasticizers and softening oils e. reclaimed rubber
b
Plain carbon steels are designated in the AISA code system by which of the following: Select one: a. 01XX b. 10XX c. 11XX d. 12XX e. 30XX
b
Rapid prototyping technologies are never used to make production parts: Select one: a. true b. false
b
Resistance-welding processes make use of the heat generated by electrical resistance to achieve fusion of the two parts to be joined; no pressure is used in these processes, and no filler material is added: Select one: a. true b. false
b
Scarfing in the brazing of a butt loint involves the wrapping of a sheath around the two parts to be joined to contain the molten filler metal during the heating process: Select one: a. true b. false
b
The strength of a brazed joint is typically (a) equal to, (b) stronger than, or (c) weaker than the filler metal out of which it is made? Select one: a. equal to b. stronger than c. weaker than
b
Viscosity can be defined as the ease with which a fluid flows: Select one: a. true b. false
b
Weld failures always occur in the fusion zone of the weld joint, since this is the part of the joint that has been melted: Select one: a. true b. false
b
Which cutting speed is always lower for a given machining operation: Select one: a. cutting speed for maximum production rate b. cutting speed for minimum cost
b
Which of the following cutting conditions has the strongest effect on cutting temperature: Select one: a. feed b. speed
b
Which one of the following qualifies as a precision-casting process (two correct answers): Select one or more: a. ingot casting b. investment casting c. plaster-mold casting d. sand casting e. shell molding
b, c
Reaming is used for which of the following functions (three correct answers): Select one or more: a. accurately locate a hole position b. enlarge a drilled hole c. improve surface finish on a hole d. improve tolerance on hole diameter e. provide an internal thread
b, c, d
Which of the following are characteristics of work situations that tend to promote the substitution of a robot in place of a human worker (three best answers): Select one or more: a. frequent job changeovers b. hazardous work environment c. repetitive work cycle d. multiple work shifts e. task requires mobility
b, c, d
Which of the following are the three basic types of static stresses to which a material can be subjected (three correct answers): Select one or more: a. reduction in area b. shear c. compression d. yield e. tensile
b, c, e
Which of the following is an advantage of brazing (three best answers): Select one or more: a. annealing of the base parts is a by-product of the process b. dissimilar metals can be joined c. less heat and energy required than fusion welding d. metallurgical improvements in the base metals e. multiple joints can be brazed simultaneously
b, c, e
Traditional brass is an alloy of which of the following metallic elements (two correct answers): Select one or more: a. aluminum b. copper c. gold d. zinc e. tin
b, d
Which of the following are examples of generating workpart geometry in machining, as opposed to forming the geometry (two best answers): Select one or more: a. broaching b. contour turning c. drilling d. profile milling e. thread cutting
b, d
A fillet weld can be used to join which of the following joint types (three correct answers): Select one or more: a. butt b. corner c. edge d. lap e. tee
b, d, e
Which of the following defects or problems is associated with injection molding (three correct answers): Select one or more: a. drag flow b. flash c. melt fracture d. short shots e. sink marks
b, d, e
Deformation processes include which of the following (two correct answers): Select one or more: a. drilling b. forging c. milling d. casting e. extrusion
b, e
Ferrous metals include which of the following (two correct answers): Select one or more: a. gold b. cast iron c. copper d. aluminum e. steel
b, e
A tolerance is which one of the following: Select one: a. clearance between a shaft and a mating hole b. measurement error c. total permissable from a specified dimension d. variation in manufacturing
c
Increasing strain rate tends to have which one of the following effects on flow stress during the hot forming of metal: Select one: a. decreases flow stress b. has no effect c. increases flow stress
c
Smaller grain size in a grinding wheel tends to: Select one: a. degrade surface finish b. have no effect on surface finish c. improve surface finish
c
The holding force in drawing is most likely to be (a) greater than, (b) equal to, or (c) less than the maximum drawing force? Select one: a. greater than b. equal to c. less than
c
When is the tread pattern imprinted onto the circumference of the tire: Select one: a. during preforming b. while building the carcass c. during molding d. during curing
c
Which one of the following casting metals is most important commercially: Select one: a. aluminum and its alloys b. bronze c. cast iron d. cast steel e. zinc alloys
c
Which one of the following engineering materials is defined as a compound containing metallic and nonmetallic elements: Select one: a. metal b. composite c. ceramic d. polymer
c
Which one of the following metals has the lowest density: Select one: a. aluminum b. copper c. magnesium d. tin
c
Which one of the following surface-hardening treatments is the most common: Select one: a. boronizing b. carbonitriding c. carburizing d. chromizing e. nitriding
c
Which one of the following turning machines permits very long bar stock to be used: Select one: a. chucking machine b. engine lathe c. screw machine d. speed lathe e. turret lathe
c
Which of the following are the two main functions of a cutting fluid in machining (two best answers): Select one or more: a. improve surface finish on the workpiece b. reduce forces and power c. reduce friction at the tool-chip interface d. remove heat from the process e. wash away chips
c, d
Which one of the following processes could be used to cut a large piece of 1/2 inch plate steel into two sections (two best answers): Select one or more: a. chemical milling b. wire EDM c. oxyfuel cutting d. water jet cutting e. band saw
c, d
A riser in casting is described by which of the following (three correct answers): Select one or more: a. an insert in the casting that inhibits buoyancy of the core b. gating system in which the sprue feeds directly into the cavity c. metal that is not part of the casting d. source of molten metal to feed the casting and compensate for shrinkage during solidification e. waste metal that is usually recycled
c, d, e
Which of the following are bulk deformation processes (three correct answers): Select one or more: a. bending b. deep drawing c. extrusion d. forging e. rolling
c, d, e
Which of the following processes use mechanical energy as the principle energy source (three correct answers): Select one or more: a. electrochemical grinding b. laser beam machining c. conventional milling d. ultrasonic machining e. water jet cutting
c, d, e
Which of the following processes start with a material that is in a fluid or semifluid state and solidifies the material in a cavity (two best answers): Select one or more: a. forging b. pressing c. casting d. machining e. molding
c, e
Which of the following properties or characteristics are inconsistent with the metals (two correct answers): Select one or more: a. good thermal conductivity b. high strength c. high electrical resistivity d. high stiffness e. ionic bonding
c, e
On which one of the following metals is the treatment called austenitizing performed: Select one: a. aluminum alloys b. brass c. copper alloys d. steel
d
The cutting force in a sheet-metal blanking operation depends on which mechanical property of the metal (one correct answer): Select one: a. compressive strength b. modulus of elasticity c. shear strength d. strain rate e. tensile strength
d
The element with the lowest density and the smallest atomic weight is which one of the following: Select one: a. helium b. argon c. aluminum d. hydrogen e. magnesium
d
The function of the ejection system is which one of the following: Select one: a. move polymer melt into the mold cavity b. open the mold halves after the cavity is filled c. remove the molded parts from the runner system after molding d. separate the part from the cavity after molding
d
The parting line in injection molding is which one of the following: Select one: a. the lines formed where the polymer melt meets after flowing around a core in the mold b. the narrow gate sections where the parts are separated from the runner c. where the clamping unit is joined to the injection unit in the molding machine d. where the two mold halves come together
d
The predominant phase in the iron-carbon alloy system for a composition with 99% Fe at room temperature is which one of the following: Select one: a. austenite b. cementite c. delta d. ferrite e. gamma
d
The term encapsulation refers to which one of the following plastics shaping processes: Select one: a. compression molding b. vacuum thermoforming c. extrusion of hollow forms d. casting
d
Which of the following powder shapes would tend to have the lowest interpartle friction: Select one: a. acicular b. cubic c. flakey d. spherical e. rounded
d
Which one of the following abrasive materials is most appropriate for grinding nonferrous metals: Select one: a. aluminum oxide b. cubic boron notride c. diamond d. silicon carbide
d
Which one of the following abrasive processes achieves the best surface finish: Select one: a. centerless grinding b. honing c. lapping d. superfinishing
d
Which one of the following casting processes is the most widely used: Select one: a. centrifugal casting b. die casting c. investment casting d. sand casting e. shell casting
d
Which one of the following is closest to the temperatures used in plasma arc cutting: Select one: a. 2,750 C (5,000 F) b. 5,500 C (10,000 F) c. 8,300 C (15,000 F) d. 11,000 C (20,000 F) e. 16,500 C (30,000 F)
d
A programmable logic controller (PLC) normally replaces which one of the following in control applications: Select one: a. computer numerical control b. distributed process control c. humans d. industrial robots e. relay control panel
e
Approximately how many different elements have been identified (one best answer): Select one: a. 10 b. 500 c. 200 d. 50 e. 100
e
Investment casting is also known by which one of the following names: Select one: a. fast-payback molding b. full-mold process c. lost-foam process d. lost-pattern process e. lost-wax process
e
Of all of the current material addition rapid prototyping technologies, which one is the most widely used: Select one: a. ballistic particle manufacturing b. fused deposition modeling c. selective laser sintering d. solid ground curing e. stereolithography
e
Of the following processes, which one is noted for the highest material removal rates: Select one: a. electric discharge machining (EDM) b. electrochemical maching c. laser beam machining d. oxyfuel cutting e. plasma arc cutting
e
Of the various methods for testing machinability, which one of the following is the most important: Select one: a. cutting forces b. cutting temperature c. horsepower consumed in the operation d. surface roughness e. tool life
e
The treatment in which the brittleness of martensite is reduced is called which one of the following: Select one: a. annealing b. austenitizing c. normalizing d. quenching e. tempering
e
Which one of the following is a machine used to perform extrusion: Select one: a. milling machine b. rolling mill c. torch d. forge hammer e. press
e
Which one of the following is not a common alloying ingredient in steel: Select one: a. chromium b. manganese c. nickel d. vanadium e. zinc
e
Which one of the following metals is associated with the term galvanizing: Select one: a. iron b. lead c. steel d. tin e. zinc
e
Which one of the following stamping dies is the most complicated: Select one: a. blanking die b. combination die c. compound die d. edge-bending die e. progressive die
e
Which one of the following casting processes are permanent mold operations (three correct answers): Select one or more: a. centrifugal casting b. die casting c. expanded polystyrene process d. sand casting e. slush casting
a, b, e
The principle components of an injection molding machine are which two of the following: Select one or more: a. clamping unit b. hopper c. injection unit d. mold e. part ejection unit
a, c
Which of the following processes are used to provide the thin coatings on the surface of coated carbide inserts (two best answers): Select one or more: a. chemical vapor deposition b. electroplating c. physical vapor deposition d. pressing and sintering e. spray painting
a, c
Particulate processing of metals and ceramics involves which of the following steps (two best answers): Select one or more: a. sintering b. pressing c. deformation d. forging e. material removal
a, b
Which of the following are reasons why mechanical assembly is often preferred over other forming processes (two best answers): Select one or more: a. ease of assembly b. ease of disassembly c. economies of scale d. specialization of labor
a, b
Which of the following metals are noted for their good electrical conductivity (two best answers): Select one or more: a. copper b. gold c. iron d. nickel e. tungsten
a, b
Which of the following design features would be difficult or impossible to achieve by conventional pressing and sintering (three best answers): Select one or more: a. outside rounded corners b. side holes c. threaded holes d. vertical stepped holes e. vertical wall thickness of 1/8 inch (3mm)
a, b ,c
Which of the following bond types are classified as primary bonds (three correct answers): Select one or more: a. ionic bonding b. metallic bonding c. covalent bonding d. hydrogen bonding e. van der Waals forces
a, b, c
Which of the following defects or problems is associated with injection molding (three correct answers): Select one or more: a. sink marks b. short shots c. melt fracture d. flash e. drag flow
a, b, d
Which of the following processes combines pressing and sintering of the metal powders (three best answers): Select one or more: a. hot isostatic pressing b. hot pressing c. metal injection molding d. spark sintering
a, b, d
Which of the following are advantages of die casting over sand casting (four best answers): Select one or more: a. better surface finish b. closer tolerances c. higher melting temperature metals d. higher production rates e. mold can be reused
a, b, d, e
Surface texture includes which of the following characteristics of a surface (three correct answers): Select one or more: a. deviations from the nominal surface b. feed marks from the tool that produced the surface c. hardness variations d. oil films e. surface cracks
a, b, e
A facing operation is normally performed on which one of the following machine tools: Select one: a. drill press b. lathe c. milling machine d. planer e. shaper
b
Applications of electron beam machining are limited to metallic work materials due to the need for the work to be electrically conductive: Select one: a. true b. false
b
As sheet-metal stock hardness increases in a blanking operation, the clearance between punch and die should be: Select one: a. decreased b. increased c. remain the same
b
For metallurgical reasons, it is desirable to melt the weld metal with minimum energy input. Which one of the following heat sources is most consistent with this objective: Select one: a. high power b. high power density c. low power d. low power density
b
For which one of the following reasons is a green mold named: Select one: a. green is the color of the mold b. moisture is contained in the mold c. the mold is cured d. the mold is dry
b
Fron which of the following ores is aluminum derived: Select one: a. alumina b. bauxite c. cementite d. hematite e. scheelite
b
Which of the following are reasons why workparts must be cleaned in industry (four best answers): Select one or more: a. to avoid water pollution b. to enhance appearance c. to improve hygiene conditions for workers d. to prepare the surface for subsequent processing e. to remove contaminants that might chemically attack the surface
b, c, d, e
Which of the following casting processes are expendable mold operations (four correct answers): Select one or more: a. die casting b. investment casting c. sand casting d. shell molding e. vacuum molding
b, c, d, e
Which of the following metals are used in solder alloys (four correct answers): Select one or more: a. gold b. antimony c. lead d. silver e. tin
b, c, d, e
Identify which of the following applications are point-to-point and not continuous path operations (three correct answers): Select one or more: a. arc welding b. drilling c. hole punching in sheet metal d. milling e. spot welding
b, c, e
In the Periodic Table, the elements can be divided into which of the following categories (three best answers): Select one or more: a. liquids b. nonmetals c. semimetals d. polymers e. metals
b, c, e
Which of the following are point defects in a crystal lattice structure (three correct answers): Select one or more: a. edge dislocation b. interstitialcy c. Schottky defect d. grain boundaries e. vacancy
b, c, e
Which of the following metals has the highest density: Select one: a. gold b. lead c. platinum d. silver e. tungsten
c
As particle size increases, interparticle friction: Select one: a. decreases b. increases c. remains the same d. exponentially changes by the power of 10
a
If stress values were measured during a tensile test, which of the following would have the higher value: Select one: a. true stress b. engineering stress
a
In a sheet metal cutting operation used to produce a flat part with a hole in the center, the part itself is called a blank, and the scrap piece that was cut out to make the hole is called a slug: Select one: a. true b. false
a
In cold isostatic pressing, the mold is most typically made of which one of the following: Select one: a. rubber b. sheetmetal c. textile d. thermosetting polymer e. tool steel
a