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ITEC 458 - Materials > Exam 1 > Flashcards

Exam 1 Flashcards

1
Q

About what percentage of the U.S gross domestic product is accounted for by the manufacturing industries?
A) 5%
B) 12%
C) 20%
D) 25%

A

B) 12%

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2
Q

Define manufacturing
A) The process of extracting raw materials
B) The process of converting raw materials into finished products
C) The process of providing services
D) The process of distributing goods

A

B) The process of converting raw materials into finished products

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3
Q

The manufacturing industries are considered part of which of the following industry classifications:
A) Primary
B) Secondary
C) Tertiary
D) Quaternary

A

B) Secondary

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4
Q

What is the difference between a consumer good and a capital good?
A) Consumer goods are used by businesses, capital goods are used by individuals
B) Consumer goods are used by individuals, capital goods are used by businesses
C) Consumer goods are raw materials, capital goods are finished products
D) Consumer goods are intangible, capital goods are tangible

A

B) Consumer goods are used by individuals, capital goods are used by businesses

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5
Q

What is the difference between soft product variety and hard product variety?
A) Soft product variety refers to minor differences, hard product variety refers to major differences
B) Soft product variety refers to major differences, hard product variety refers to minor differences
C) Soft product variety refers to differences in services, hard product variety refers to differences in goods
D) Soft product variety refers to differences in raw materials, hard product variety refers to differences in finished products

A

A) Soft product variety refers to minor differences, hard product variety refers

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6
Q

One of the dimensions of manufacturing capability is technological processing capability. Define
technological processing capability.
A) The ability to produce goods at a low cost
B) The ability to produce goods with high quality
C) The ability to perform a particular manufacturing process
D) The ability to innovate new products

A

C) The ability to perform a particular manufacturing process

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7
Q

What are the four categories of engineering materials used in manufacturing?
A) Metals, Polymers, Ceramics, Composites
B) Metals, Plastics, Woods, Fabrics
C) Metals, Alloys, Polymers, Ceramics
D) Metals, Polymers, Ceramics, Glass

A

A) Metals, Polymers, Ceramics, Composites

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8
Q

What is the definition of steel?
A) An alloy of iron and carbon
B) A pure metal
C) A type of ceramic
D) A type of polymer

A

A) An alloy of iron and carbon

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9
Q

What are some of the typical applications of steel?
A) Construction, Automotive, Appliances
B) Electronics, Textiles, Food Packaging
C) Pharmaceuticals, Cosmetics, Agriculture
D) Furniture, Clothing, Toys

A

A) Construction, Automotive, Appliances

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10
Q

What is the difference between a thermoplastic polymer and a thermosetting polymer?
A) Thermoplastics can be remelted, thermosets cannot
B) Thermoplastics cannot be remelted, thermosets can
C) Thermoplastics are used in high-temperature applications, thermosets are not
D) Thermoplastics are more rigid, thermosets are more flexible

A

A) Thermoplastics can be remelted, thermosets cannot

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11
Q

Manufacturing processes are usually accomplished as unit operations. Define unit operation.
A) A single step in the manufacturing process
B) A series of steps in the manufacturing process
C) The final step in the manufacturing process
D) The initial step in the manufacturing process

A

A) A single step in the manufacturing process

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12
Q

In manufacturing processes, what is the difference between a processing operation and an assembly
operation?
A) Processing operations involve shaping materials, assembly operations involve joining materials
B) Processing operations involve joining materials, assembly operations involve shaping materials
C) Processing operations involve packaging materials, assembly operations involve distributing materials
D) Processing operations involve distributing materials, assembly operations involve packaging materials

A

A) Processing operations involve shaping materials, assembly operations involve joining materials

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13
Q

One of the three general types of processing operations is shaping operations. What are the four
categories of shaping operations?
A) Casting, Forming, Machining, Joining
B) Casting, Forming, Machining, Additive Manufacturing
C) Casting, Forming, Machining, Surface Treatment
D) Casting, Forming, Machining, Heat Treatment

A

B) Casting, Forming, Machining, Additive Manufacturing

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14
Q

What is the difference between net shape processes and near net shape processes?
A) Net shape processes produce parts that require no further machining, near net shape processes
produce parts that require minimal machining
B) Net shape processes produce parts that require minimal machining, near net shape processes
produce parts that require no further machining
C) Net shape processes produce parts that require extensive machining, near net shape processes
produce parts that require no machining
D) Net shape processes produce parts that require no machining, near net shape processes
produce parts that require extensive machining

A

A) Net shape processes produce parts that require no further machining, near net shape processes
produce parts that require minimal machining

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15
Q

Identify the four types of permanent joining processes used in assembly.
A) Welding, Brazing, Soldering, Adhesive Bonding
B) Welding, Riveting, Screwing, Adhesive Bonding
C) Welding, Brazing, Screwing, Adhesive Bonding
D) Welding, Riveting, Soldering, Adhesive Bonding

A

A) Welding, Brazing, Soldering, Adhesive Bonding

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16
Q

What is a machine tool?
A) A device used to perform a manufacturing process
B) A device used to measure manufacturing processes
C) A device used to transport materials in manufacturing
D) A device used to package finished products

A

A) A device used to perform a manufacturing process

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17
Q

What is the difference between special purpose and general purpose production equipment?
A) Special purpose equipment is designed for specific tasks, general purpose equipment is
versatile
B) Special purpose equipment is versatile, general purpose equipment is designed for specific
tasks
C) Special purpose equipment is used in small-scale production, general purpose equipment is
used in large-scale production
D) Special purpose equipment is used in large-scale production, general purpose equipment is
used in small-scale production

A

A) Special purpose equipment is designed for specific tasks, general purpose equipment is
versatile

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18
Q

What are some of the general properties that distinguish metals from ceramics and polymers?
A) High electrical conductivity, ductility, and malleability
B) Low density, high thermal insulation, and brittleness
C) High thermal conductivity, transparency, and flexibility
D) Low electrical conductivity, high strength, and elasticity

A

A) High electrical conductivity, ductility, and malleability

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19
Q

What are the two major groups of metals? Define them.
A) Ferrous metals and non-ferrous metals
B) Precious metals and base metals
C) Light metals and heavy metals
D) Alkali metals and alkaline earth metals

A

A) Ferrous metals and non-ferrous metals

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20
Q

What is an alloy?
A) A pure metal
B) A mixture of two or more elements, where at least one is a metal
C) A type of ceramic
D) A polymer with metallic properties

A

B) A mixture of two or more elements, where at least one is a metal

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21
Q

Identify some of the common alloying elements other than carbon in low alloy steels.
A) Chromium, Nickel, Manganese
B) Silicon, Phosphorus, Sulfur
C) Gold, Silver, Platinum
D) Zinc, Tin, Lead

A

A) Chromium, Nickel, Manganese

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22
Q

What is the predominant alloying element in all of the stainless steels?
A) Nickel
B) Chromium
C) Manganese
D) Copper

A

B) Chromium

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23
Q

Besides high carbon content, what other alloying element is characteristic of the cast irons?
A) Silicon
B) Nickel
C) Chromium
D) Manganese

A

A) Silicon

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24
Q

Identify some of the properties for which aluminum is noted.
A) High density, magnetic properties, and brittleness
B) Low density, high corrosion resistance, and good electrical conductivity
C) High melting point, hardness, and opacity
D) Low thermal conductivity, flexibility, and transparency

A

B) Low density, high corrosion resistance, and good electrical conductivity

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25
Q

What are some of the noteworthy properties of magnesium?
A) High density, high melting point, and magnetic properties
B) Low density, good strength-to-weight ratio, and excellent machinability
C) High electrical conductivity, corrosion resistance, and ductility
D) Low thermal conductivity, brittleness, and hardness

A

B) Low density, good strength-to-weight ratio, and excellent machinability

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26
Q

What is the most important engineering property of copper that determines most of its applications?
A) High strength
B) High electrical conductivity
C) High thermal insulation
D) High density

A

B) High electrical conductivity

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27
Q

What elements are traditionally alloyed with copper to form (a) bronze and (b) brass?
A) (a) Tin, (b) Zinc
B) (a) Zinc, (b) Tin
C) (a) Nickel, (b) Aluminum
D) (a) Aluminum, (b) Nickel

A

A) (a) Tin, (b) Zinc

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28
Q

What are some of the important applications of nickel?
A) Jewelry, coins, and electrical wiring
B) Stainless steel, superalloys, and batteries
C) Construction materials, automotive parts, and packaging
D) Textiles, food containers, and medical devices

A

B) Stainless steel, superalloys, and batteries

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29
Q

What are the noteworthy properties of titanium?
A) High density, high electrical conductivity, and brittleness
B) Low density, high strength, and excellent corrosion resistance
C) High thermal conductivity, flexibility, and transparency
D) Low melting point, hardness, and opacity

A

B) Low density, high strength, and excellent corrosion resistance

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30
Q

Identify some of the important applications of zinc.
A) Galvanizing steel, die casting, and making brass
B) Electrical wiring, jewelry, and coins
C) Construction materials, automotive parts, and packaging
D) Textiles, food containers, and medical devices

A

A) Galvanizing steel, die casting, and making brass

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31
Q

The superalloys divide into three basic groups, according to the base metal used in the alloy. Name
the three groups.
A) Nickel-based, iron-based, and cobalt-based
B) Copper-based, aluminum-based, and titanium-based
C) Zinc-based, magnesium-based, and lead-based
D) Chromium-based, manganese-based, and silicon-based

A

A) Nickel-based, iron-based, and cobalt-based

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32
Q

What is so special about the superalloys? What distinguishes them from other alloys?
A) High electrical conductivity and low density
B) High strength and resistance to high temperatures and corrosion
C) Low melting point and high flexibility
D) High thermal insulation and transparency

A

B) High strength and resistance to high temperatures and corrosion

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33
Q

What is a ceramic?
A) A metallic material
B) An organic polymer
C) An inorganic, non-metallic material
D) A composite material

A

C) An inorganic, non-metallic material

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34
Q

What is the difference between the traditional ceramics and the new ceramics?
A) Traditional ceramics are used in electronics, new ceramics are used in construction
B) Traditional ceramics are made from clay, new ceramics are made from pure compounds
C) Traditional ceramics are flexible, new ceramics are brittle
D) Traditional ceramics are transparent, new ceramics are opaque

A

B) Traditional ceramics are made from clay, new ceramics are made from pure compounds

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35
Q

What is the feature that distinguishes glass from the traditional and new ceramics?
A) Its crystalline structure
B) Its amorphous (non-crystalline) structure
C) Its metallic properties
D) Its polymeric properties

A

B) Its amorphous (non-crystalline) structure

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36
Q

What are the general mechanical properties of ceramic materials?
A) High strength, high ductility, and high electrical conductivity
B) High hardness, brittleness, and low electrical conductivity
C) Low density, high flexibility, and high thermal conductivity
D) Low melting point, high strength, and high ductility

A

B) High hardness, brittleness, and low electrical conductivity

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37
Q

What is clay, used in making ceramic products?
A) A type of metal
B) A type of polymer
C) A fine-grained natural soil material
D) A synthetic composite material

A

C) A fine-grained natural soil material

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38
Q

What are some of the principal applications of cemented carbides, such as WC Co?
A) Cutting tools, wear-resistant surfaces, and mining tools
B) Electrical wiring, jewelry, and coins
C) Construction materials, automotive parts, and packaging
D) Textiles, food containers, and medical devices

A

A) Cutting tools, wear-resistant surfaces, and mining tools

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39
Q

What is the primary mineral in glass products?
A) Quartz
B) Feldspar
C) Calcite
D) Gypsum

A

A) Quartz

40
Q

What is a polymer?
A) A metallic material
B) An inorganic, non-metallic material
C) An organic compound consisting of large molecules made up of repeating units
D) A composite material

A

C) An organic compound consisting of large molecules made up of repeating units

41
Q

What is cross linking in a polymer, and what is its significance?
A) The process of adding fillers to a polymer, increasing its density
B) The formation of chemical bonds between polymer chains, increasing its strength and rigidity
C) The process of heating a polymer, making it more flexible
D) The addition of plasticizers to a polymer, making it more elastic

A

B) The formation of chemical bonds between polymer chains, increasing its strength and rigidity

42
Q

What is the primary polymer ingredient in natural rubber?
A) Polyethylene
B) Polypropylene
C) Polyisoprene
D) Polystyrene

A

C) Polyisoprene

43
Q

What is a cermet?
A) A type of ceramic
B) A composite material composed of ceramic and metallic materials
C) A type of polymer
D) A pure metal

A

B) A composite material composed of ceramic and metallic materials

44
Q

What is the most common fiber material in fiber reinforced plastics?
A) Carbon fiber
B) Glass fiber
C) Kevlar fiber
D) Nylon fiber

A

B) Glass fiber

45
Q

What is the dilemma between design and manufacturing in terms of mechanical properties?
A) Design requires high strength, manufacturing requires low cost
B) Design requires high strength, manufacturing requires ease of fabrication
C) Design requires low weight, manufacturing requires high density
D) Design requires high flexibility, manufacturing requires rigidity

A

B) Design requires high strength, manufacturing requires ease of fabrication

46
Q

What are the three types of static stresses to which materials are subjected?
A) Tension, compression, shear
B) Tension, torsion, bending
C) Compression, torsion, bending
D) Shear, torsion, bending

A

A) Tension, compression, shear

47
Q

State Hooke’s law.
A) Stress is proportional to strain
B) Stress is inversely proportional to strain
C) Stress is proportional to the square of strain
D) Stress is inversely proportional to the square of strain

A

A) Stress is proportional to strain

48
Q

What is the difference between engineering stress and true stress in a tensile test?
A) Engineering stress accounts for initial area, true stress accounts for instantaneous area
B) Engineering stress accounts for instantaneous area, true stress accounts for initial area
C) Engineering stress is measured in Pascals, true stress is measured in Newtons
D) Engineering stress is measured in Newtons, true stress is measured in Pascals

A

A) Engineering stress accounts for initial area, true stress accounts for instantaneous area

49
Q

Define tensile strength of a material.
A) The maximum stress a material can withstand before breaking
B) The stress at which a material begins to deform plastically
C) The stress at which a material returns to its original shape
D) The stress at which a material fractures

A

A) The maximum stress a material can withstand before breaking

50
Q

Define yield strength of a material.
A) The maximum stress a material can withstand before breaking
B) The stress at which a material begins to deform plastically
C) The stress at which a material returns to its original shape
D) The stress at which a material fractures

A

B) The stress at which a material begins to deform plastically

51
Q

Why cannot a direct conversion be made between the ductility measures of elongation and reduction in area using the assumption of constant volume?
A) Because elongation and reduction in area measure different aspects of ductility
B) Because volume changes during plastic deformation
C) Because elongation is measured in percentage and reduction in area is measured in units
D) Because the material’s density changes during deformation

A

A) Because elongation and reduction in area measure different aspects of ductility

52
Q

What is work hardening?
A) The increase in hardness and strength of a metal due to plastic deformation
B) The decrease in hardness and strength of a metal due to plastic deformation
C) The increase in ductility of a metal due to plastic deformation
D) The decrease in ductility of a metal due to plastic deformation

A

A) The increase in hardness and strength of a metal due to plastic deformation

53
Q

Under what circumstances does the strength coefficient have the same value as the yield strength?
A) When the material is perfectly elastic
B) When the material is perfectly plastic
C) When the material has no strain hardening
D) When the material has maximum strain hardening

A

C) When the material has no strain hardening

54
Q

How does the change in cross sectional area of a test specimen in a compression test differ from its counterpart in a tensile test specimen?
A) In compression, the area decreases; in tension, the area increases
B) In compression, the area increases; in tension, the area decreases
C) In both compression and tension, the area remains constant
D) In both compression and tension, the area decreases

A

A) In compression, the area decreases; in tension, the area increases

55
Q

Tensile testing is not appropriate for hard brittle materials such as ceramics. What is the test commonly used to determine the strength properties of such materials?
A) Compression test
B) Shear test
C) Bending test
D) Torsion test

A

C) Bending test

56
Q

What is hardness, and how is it generally tested?
A) Hardness is the resistance to deformation, tested by indentation
B) Hardness is the resistance to fracture, tested by bending
C) Hardness is the resistance to wear, tested by scratching
D) Hardness is the resistance to impact, tested by dropping

A

A) Hardness is the resistance to deformation, tested by indentation

57
Q

Why are different hardness tests and scales required?
A) Because different materials have different hardness properties
B) Because different tests measure different aspects of hardness
C) Because different scales are used in different countries
D) Because different tests are suitable for different material types

A

D) Because different tests are suitable for different material types

58
Q

Define the recrystallization temperature for a metal.
A) The temperature at which a metal melts
B) The temperature at which a metal undergoes phase transformation
C) The temperature at which new grains form in a deformed metal
D) The temperature at which a metal becomes brittle

A

C) The temperature at which new grains form in a deformed metal

59
Q

Define viscosity of a fluid.
A) The resistance to flow
B) The ability to conduct heat
C) The ability to conduct electricity
D) The resistance to deformation

A

A) The resistance to flow

60
Q

What is the defining characteristic of a Newtonian fluid?
A) Its viscosity remains constant regardless of the shear rate
B) Its viscosity changes with the shear rate
C) It has no viscosity
D) It has high viscosity

A

A) Its viscosity remains constant regardless of the shear rate

61
Q

What is viscoelasticity, as a material property?
A) The property of materials that exhibit both viscous and elastic characteristics when deformed
B) The property of materials that exhibit only viscous characteristics when deformed
C) The property of materials that exhibit only elastic characteristics when deformed
D) The property of materials that exhibit no deformation

A

A) The property of materials that exhibit both viscous and elastic characteristics when deformed

62
Q

Define density as a material property.
A) The mass per unit volume
B) The volume per unit mass
C) The weight per unit volume
D) The volume per unit weight

A

A) The mass per unit volume

63
Q

What is the difference in melting characteristics between a pure metal element and an alloy metal?
A) Pure metals have a single melting point, alloys have a melting range
B) Pure metals have a melting range, alloys have a single melting point
C) Both pure metals and alloys have a single melting point
D) Both pure metals and alloys have a melting range

A

A) Pure metals have a single melting point, alloys have a melting range

64
Q

Define specific heat as a material property.
A) The amount of heat required to raise the temperature of a unit mass by one degree Celsius
B) The amount of heat required to raise the temperature of a unit volume by one degree Celsius
C) The amount of heat required to raise the temperature of a unit mass by one degree Fahrenheit
D) The amount of heat required to raise the temperature of a unit volume by one degree Fahrenheit

A

A) The amount of heat required to raise the temperature of a unit mass by one degree Celsius

65
Q

What is thermal conductivity as a material property?
A) The ability of a material to conduct heat
B) The ability of a material to conduct electricity
C) The ability of a material to resist heat flow
D) The ability of a material to resist electrical flow

A

A) The ability of a material to conduct heat

66
Q

Define thermal diffusivity.
A) The rate at which heat spreads through a material
B) The rate at which a material absorbs heat
C) The rate at which a material loses heat
D) The rate at which a material resists heat flow

A

A) The rate at which heat spreads through a material

67
Q

What is a tolerance?
A. The allowable variation in a physical dimension
B. The exact measurement of a part
C. The process of measuring a part
D. The surface finish of a part

A

A. The allowable variation in a physical dimension

68
Q

What is the difference between a bilateral tolerance and a unilateral tolerance?
A. Bilateral tolerance allows variation in one direction; unilateral allows in both directions
B. Bilateral tolerance allows variation in both directions; unilateral allows in one direction
C. Bilateral tolerance is more precise than unilateral tolerance
D. There is no difference

A

B. Bilateral tolerance allows variation in both directions; unilateral allows in one direction

69
Q

What is accuracy in measurement?
A. The ability to measure the same value repeatedly
B. The closeness of a measurement to the true value
C. The smallest measurable unit
D. The range of measurement

A

B. The closeness of a measurement to the true value

70
Q

What is precision in measurement?
A. The ability to measure the same value repeatedly
B. The closeness of a measurement to the true value
C. The smallest measurable unit
D. The range of measurement

A

A. The ability to measure the same value repeatedly

71
Q

What are some of the reasons why surfaces are important?
A. Aesthetic appearance
B. Friction and wear characteristics
C. Ability to hold lubricants
D. All of the above

A

D. All of the above

72
Q

Define nominal surface.
A. The actual surface of a part
B. The intended surface without any deviations
C. The roughness of a surface
D. The waviness of a surface

A

B. The intended surface without any deviations

73
Q

Define surface texture.
A. The overall shape of a part
B. The combination of roughness, waviness, and lay
C. The color of a surface
D. The hardness of a surface

A

B. The combination of roughness, waviness, and lay

74
Q

How is surface texture distinguished from surface integrity?
A. Surface texture refers to the topography; surface integrity includes the material properties
B. Surface texture includes material properties; surface integrity refers to the topography
C. They are the same
D. Surface texture is more important than surface integrity

A

A. Surface texture refers to the topography; surface integrity includes the material properties

75
Q

Within the scope of surface texture, how is roughness distinguished from waviness?
A. Roughness refers to longer wavelength deviations; waviness refers to shorter wavelength deviations
B. Roughness refers to shorter wavelength deviations; waviness refers to longer wavelength deviations
C. Roughness is the same as waviness
D. Roughness is less important than waviness

A

B. Roughness refers to shorter wavelength deviations; waviness refers to longer wavelength deviations

76
Q

Surface roughness is a measurable aspect of surface texture; what does surface roughness mean?
A. The overall shape of a part
B. The deviations from the nominal surface
C. The color of a surface
D. The hardness of a surface

A

B. The deviations from the nominal surface

77
Q

Indicate some of the limitations of using surface roughness as a measure of surface texture.
A. It does not account for waviness
B. It does not account for lay
C. It does not account for surface integrity
D. All of the above

A

D. All of the above

78
Q

What causes the various types of changes that occur in the altered layer just beneath the surface?
A. Mechanical deformation
B. Thermal effects
C. Chemical reactions
D. All of the above

A

D. All of the above

79
Q

Name some manufacturing processes that produce very poor surface finishes.
A. Grinding and polishing
B. Sand casting and flame cutting
C. Lapping and honing
D. Electroplating and anodizing

A

B. Sand casting and flame cutting

80
Q

Name some manufacturing processes that produce very good or excellent surface finishes.
A. Grinding and polishing
B. Sand casting and flame cutting
C. Lapping and honing
D. Both A and C

A

C. Lapping and honing

81
Q

Identify some of the important advantages of shape-casting processes.
A. Ability to create complex shapes
B. High production rates
C. Wide range of materials
D. All of the above

A

D. All of the above

82
Q

What are some of the limitations and disadvantages of casting?
A. Poor dimensional accuracy
B. High material waste
C. Limited to small parts
D. All of the above

A

D. All of the above

83
Q

What is a factory that performs casting operations usually called?
A. Foundry
B. Mill
C. Forge
D. Workshop

A

A. Foundry

84
Q

What is the difference between an open mold and a closed mold?
A. Open mold is used for metals; closed mold is used for plastics
B. Open mold has no top; closed mold is completely enclosed
C. Open mold is reusable; closed mold is single-use
D. There is no difference

A

B. Open mold has no top; closed mold is completely enclosed

85
Q

Name the two basic mold types that distinguish casting processes.
A. Permanent and temporary molds
B. Sand and metal molds
C. Open and closed molds
D. Expendable and permanent molds

A

D. Expendable and permanent molds

86
Q

Which casting process is the most important commercially?
A. Die casting
B. Sand casting
C. Investment casting
D. Shell molding

A

B. Sand casting

87
Q

What is the difference between a pattern and a core in sand molding?
A. Pattern forms the external shape; core forms internal cavities
B. Pattern is reusable; core is single-use
C. Pattern is made of metal; core is made of sand
D. There is no difference

A

A. Pattern forms the external shape; core forms internal cavities

88
Q

What is meant by the term superheat?
A. Heating the mold before pouring
B. The temperature above the melting point of the metal
C. The heat required to melt the metal
D. The heat lost during solidification

A

B. The temperature above the melting point of the metal

89
Q

Why should turbulent flow of molten metal into the mold be avoided?
A. It causes faster cooling
B. It leads to defects and inclusions
C. It improves surface finish
D. It increases production speed

A

B. It leads to defects and inclusions

90
Q

What is the continuity law as it applies to the flow of molten metal in casting?
A. The volume flow rate must remain constant
B. The temperature must remain constant
C. The pressure must remain constant
D. The velocity must remain constant

A

A. The volume flow rate must remain constant

91
Q

What does heat of fusion mean in casting?
A. The heat required to raise the temperature of the metal
B. The heat required to melt the metal
C. The heat lost during solidification
D. The heat required to form the mold

A

B. The heat required to melt the metal

92
Q

How does solidification of alloys differ from solidification of pure metals?
A. Alloys solidify at a single temperature
B. Alloys solidify over a range of temperatures
C. Pure metals solidify over a range of temperatures
D. There is no difference

A

B. Alloys solidify over a range of temperatures

93
Q

What is a eutectic alloy?
A. An alloy with the highest melting point
B. An alloy with the lowest melting point
C. An alloy that solidifies at a single temperature
D. An alloy that solidifies over a range of temperatures

A

C. An alloy that solidifies at a single temperature

94
Q

What is the relationship known as Chvorinov’s rule in casting?
A. It relates the cooling rate to the mold material
B. It relates the solidification time to the volume and surface area of the casting
C. It relates the pouring temperature to the mold temperature
D. It relates the flow rate to the mold design

A

B. It relates the solidification time to the volume and surface area of the casting

95
Q

Identify the three sources of contraction in a metal casting after pouring.
A. Liquid contraction, solidification shrinkage, and thermal contraction
B. Liquid expansion, solidification shrinkage, and thermal contraction
C. Liquid contraction, solidification expansion, and thermal contraction
D. Liquid contraction, solidification shrinkage, and thermal expansion

A

C. Liquid contraction, solidification expansion, and thermal contraction

ITEC 458 - Materials (3 decks)

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