Multiple Choice - MAE 183A
MC - 5.1: Which of the following best describes a tolerance?(a) clearance between a shaft and a mating hole, (b) measurement error, (c) total permissible variation from a specified dimension, (d) variation in manufacturing
(c) total permissible variation from a specified dimension
MC - 20.3: Of the total energy consumed in a machining operation, what is the proportion of energy converted to heat?(a) 50%, (b) 75%, (c) 90%, (d) 98%, (e) 100%
(d) 98%
MC - 21.1: Reaming is used for which of the following functions?(a) accurately locate a hole position, (b) create a stepped hole, (c) enlarge a drilled hole, (d) improve surface finish on a hole, (e) improve tolerance on hole diameter, (f) provide an internal thread
(c) enlarge a drilled hole, (d) improve surface finish on a hole, (e) improve tolerance on hole diameter
MC - 12.2: The name of the process used to produce flat plate glass in which molten glass flows onto the surface of molten tin is which of the following? (a) casting, (b) Danner process, (c) float process, (d) molten-tin process, (e) rolling
(c) float process
MC - 3.1: Which of the following stress-strain relationships best describes the behavior of brittle materials such as ceramics and thermosetting plastics? (a) elastic and perfectly plastic, (b) elastic and strain hardening, (c) perfectly elastic, (d) none of the above
(c) perfectly elastic
MC - 19.1: Typical sheet-metal thicknesses are between 0.4 mm (1/64 in) and 6 mm (1/4 in). When thickness exceeds the upper limit of this range, the stock is usually referred to as?(a) bulk stock, (b) oversized, (c) plate, (d) thick sheet
(c) plate
MC - 9.1: Anisotropy is defined by which of the following?(a) composite materials with compositions consisting of more than two materials, (b) properties are the same in every direction, (c) properties vary depending on the direction in which they are measured, (d) strength and other properties are a function of curing temperature
(c) properties vary depending on the direction in which they are measured
MC - 21.2: Which of the following operations are classified as face milling rather than peripheral milling? (a) end milling, (b) plain milling, (c) pocket milling, (d) slab milling, (e) straddle milling, (f) surface contouring
(a) end milling, (c) pocket milling, (f) surface contouring
MC - 8.2: Which of the following methods are used for the synthesis of polymers (a) addition polymerization, (b) copolymerization, (c) cross polymerization, (d) natural polymerization, (e) step polymerization, (f) synthetic polymerization, (g) thermoplastic polymerization, (h) thermosetting polymerization
(a) addition polymerization, (e) step polymerization
MC - 4.2: In electrochemical machining, the work part in the electrolytic cell is the (a) anode or (b) cathode?
(a) anode
MC - 18.4: Which of the following stress/strength parameters are used in computation of extrusion force? (a) average flow stress, (b) compression strength, (c) final flow stress, (d) tensile strength, (e) yield strength
(a) average flow stress
MC - 18.1: Which of the following are basic bulk deformation processes in metal forming? (a) bar drawing, (b) blanking, (c) deep drawing, (d) extrusion, (e) forging, (f) stamping
(a) bar drawing, (d) extrusion, (e) forging
MC - 7.1: Which of the following are properties associated with ceramic materials? (a) chemical stability, (b) electrically conductive, (c) good ductility, (d) high hardness, (e) solublein water, (f) thermally insulating
(a) chemical stability, (d) high hardness, (f) thermally insulating
MC - 1.1: Which following are referred to as thin film deposition processes? (a) chemical vapor deposition, (b) electroplating, (c) extrusion, (d) painting, (e) physical vapordeposition
(a) chemical vapor deposition, (e) physical vapordeposition
MC - 8.1: The long-chain molecules in a polymer such as polyethylene are held together by which type(s)of bonding? (a) covalent, (b) ionic, (c) metallic, (d) van der Waals and other secondary bonding
(a) covalent
MC - 2.1: Which of the following bond types are called intramolecular bonds? (a) covalent bonding, (b) electronic bonding, (c) hydrogen bonding, (d) ionic bonding, (e)metallic bonding, (f) van der Waals forces
(a) covalent bonding, (d) ionic bonding
MC -20.4: Which of the following cutting conditions has the strongest effect on cutting temperature? (a) cutting speed, (b) depth of cut, (c) feed
(a) cutting speed
MC - 7.2: Which of the following properties and characteristics of glass ceramics are important? (a) efficiency in processing, (b) electrical conductor, (c) high thermal expansion, (d) strong relative to other glasses
(a) efficiency in processing, (d) strong relative to other glasses
MC - 17.4: Which of the following are advantages and characteristics of hot working relative to coldworking? (a) fracture of work part is less likely, (b) friction is reduced, (c) increased strength properties, (d) isotropic mechanical properties, (e) less total energy is required, (f) lower deformation forces are required, (g) more significant shape changes are possible, (h) strain-rate sensitivity is reduced
(a) fracture of work part is less likely, (d) isotropic mechanical properties, (f) lower deformation forces are required, (g) more significant shape changes are possible
MC - 17.1: Which of the following are desirable properties of work material in metal forming? (a) high ductility, (b) high tensile strength, (c) high yield strength, (d) low ductility, (e) low tensile strength, (f) low yield strength
(a) high ductility, (f) low yield strength
MC -10.1: To allow for shrinkage that occurs in during solidification, the mold cavity must be: (a) oversized or (b) undersized?
(a) oversized
MC - 10.2: What is total solidification time defined as? (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 heat of fusion
(a) time between pouring and complete solidification
MC - 1.2: A manufacturing process can be defined as a designed procedure that causes physical and/or chemical changes to a starting work material with the intention of increasing the value of that material? (a) true (b) false
(a) true
MC - 6.1: A binary phase diagram indicates the phases of two elements (at least one of which is metallic) as a function of composition and temperature at atmospheric pressure? (a) true (b) false
(a) true
MC - 11.2: The power generated by a certain heating furnace is 200 kW and its thermal efficiency = 40%.The unit energy for melting and pouring for the casting metal = 800 J/g, and the total weight ofthe metal to be heated in the furnace = 50 kg. The time required to heat the metal for pouring is closest to which one of the following?(a) 6 min, (b) 8 min, (c) 10 min, (d) 25 min, (e) 50 min
(b) 8 min
MC - 20.2: According to the Merchant equation, an increase in rake angle has which of the following effects if all other factors are the same? (a) decrease in friction angle, (b) decrease in power requirements, (c) decrease in shear plane angle, (d) increase in cutting temperature, (e) increase in shear plane angle
(b) decrease in power requirements, (e) increase in shear plane angle
MC - 8.3: As the degree of crystallinity in a polymer increases, its properties are affected in which of the following ways? (a) density decreases, (b) density increases, (c) melting temperature decreases, (d) melting temperature increases, (e) stiffness decreases, (f) stiffness increases
(b) density increases, (d) melting temperature increases, (f) stiffness increases
MC - 19.4: Springback in sheet-metal bending is the result of which of the following?(a) elastic modulus of the metal, (b) elastic recovery of the metal, (c) overbending, (d)overstraining, (e) yield strength of the metal
(b) elastic recovery of the metal
MC - 18.3: Flash in impression die forging serves no useful purpose and is undesirable because it must betrimmed from the part after forming? (a) true (b) false
(b) false
MC - 4.1: The strength-to-weight ratio of a material is its yield strength divided by its density? (a) true (b) false
(b) false
MC - 1.3: Low-quantity production of large complex products is most closely associated with which of the following layout types? (a) cellular layout, (b) fixed-position layout, (c) process layout, (d) product layout
(b) fixed-position layout
MC - 5.3: Which of the following manufacturing processes is likely to result in the best surface finish?(a) arc welding, (b) grinding, (c) milling, (d) sand casting, (e) sawing
(b) grinding
MC - 6.3: As the carbon content of plain carbon steel is increased, its strength and hardness(a) decreases, (b) increases, or (c) stays the same?
(b) increases
MC - 17.2: Which of the following describes the typical starting work geometry in sheet metal processes?(a) high volume to area ratio or (b) low volume to area ratio
(b) low volume to area ratio
MC - 12.1: Besides helping to preserve the environment, the use of recycled glass as an ingredient of the starting material in glassmaking serves what other purpose(s)? (a) adds coloring variations to the glass for aesthetic value, (b) makes the glass easier to melt,(c) makes the glass stronger, (d) reduces odors in the plant
(b) makes the glass easier to melt
MC - 11.1: Why is a green mold called "green"? (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) moisture is contained in the mold
MC - 17.3: The flow curve expresses behavior of a metal in which region of the stress strain curve?(a) elastic region or (b) plastic region
(b) plastic region
MC - 18.2: In flat rolling, the draft is: (a) reduction in thickness divided by the starting thickness, (b) reduction in thickness during one pass, (c) thickness after rolling divided by thickness before rolling, (d) thickness before rolling divided by thickness after rolling?
(b) reduction in thickness during one pass
MC - 6.2: The inverse lever rule is used to determine which of the following in a binary phase diagram?(a) the compositions of the solid and liquid phases, (b) the proportions of each phase present at a given temperature, (c) the temperatures of the solidus and liquidus for a given composition
(b) the proportions of each phase present at a given temperature
MC - 5.2: When a tolerance is specified in both positive and negative directions from a nominaldimension, what it is called?(a) bidirectional tolerance, (b) bifurcated tolerance, (c) bilateral tolerance, (d) limit tolerance, (e)symmetrical tolerance
(c) bilateral tolerance
MC - 9.2: Which of the following metals are used as matrix metals in tungsten carbide and titaniumcarbide cermets:(a) aluminum, (b) chromium, (c) cobalt, (d) lead, (e) nickel, (f) vanadium
(c) cobalt, (e) nickel
MC - 19.3: Which of the following is the best definition of bend allowance? (a) amount by which the die is larger than the punch, (b) amount of elastic recovery experienced by the metal after bending, (c) safety factor used in calculating bending force, (d) length before bending of the straight sheet-metal section to be bent
(d) length before bending of the straight sheet-metal section to be bent
MC - 20.1: Which of the following are features of the orthogonal cutting model? (a) a circular cutting edge is used, (b) a multiple-cutting-edge tool is used, (c) a single-point tool is used, (d) only two dimensions play an active role in the analysis, (e) the cutting edge is parallel to the direction of cutting speed, (f) the cutting edge is perpendicular to the direction of cutting speed, (g) the two elements of tool geometry are rake angle and relief angle
(d) only two dimensions play an active role in the analysis, (f) the cutting edge is perpendicular to the direction of cutting speed, (g) the two elements of tool geometry are rake angle and relief angle
MC - 2.2: Grain boundaries in metals interfere with dislocation movement, which contributes to which one of the following properties that are characteristic of metals?(a) crystal structure, (b) ductility, (c) electrical conductivity, (d) strain hardening, (e) thermal conductivity
(d) strain hardening
MC - 19.2: Cutting force in sheet-metal blanking depends on which mechanical properties?(a) compressive strength, (b) modulus of elasticity, (c) shear strength, (d) strain rate, (e) tensile strength, (f) yield strength
(e) tensile strength
MC - 9.3: Ceramic matrix composites are designed to overcome which weaknesses of ceramics?(a) compressive strength, (b) hardness, (c) hot hardness, (d) modulus of elasticity, (e) tensile strength, (f) toughness
(e) tensile strength, (f) toughness
