ESAS 350 objectives 1
問題一覧
1
What are considered as the “building blocks” for engineering materials?
atoms
2
What are the major classes of engineering materials?
Metals, ceramics, polymers, semiconductors and composites
3
What types of materials behave like iron when placed in a magnetic field?
ferromagnetic materials
4
What do you call metals reinforced by ceramics or other materials, usually in fiber form?
metal matrix composites
5
What is a combination of one or more metals with a nonmetallic element?
ceramic
6
Polymer comes from Greek words “poly” which means “many” and “meros” which means __________.
part
7
The engineering materials known as “plastics” are more correctly called
polymers
8
What is a combination of two or more materials that has properties that the components materials do not have by themselves?
composite
9
What is a reference sheet for the elements that can be used to form engineering materials?
periodic table
10
What physical property of a material that refers to the point at which a material liquefies on heating or solidifies on cooling?
melting point
11
What physical property of a material that refers to the temperature at which ferromagnetic materials can no longer be magnetized by outside forces?
curie point
12
What physical property of a material refers to the amount of weight gain (%) experienced in a polymer after immersion in water for a specified length of time under a controlled environment?
water absorption
13
What physical property of a material that refers to the rate of heat flow per unit time in a homogenous material under steady-state conditions per unit are, per unit temperature gradient in a direction perpendicular to area?
thermal conductivity
14
What physical property of a material refers to the highest potential difference (voltage) that an insulting material of given thickness can withstand for a specified time without occurrence of electrical breakdown through its bulk?
dielectric strength
15
What physical property of a material refers to the ratio of the amount of heat required to raise the temperature of a unit mass of a substance 1 degree to the heat required to raise the same mass of water to 1 degree.
specific heat
16
What physical property of a material refers to the temperature at which a polymer under a specified load shows a specified amount of deflection?
heat distortion temperature
17
What mechanical property of a material refers to the nominal stress at fracture in a tension test at constant load and constant temperature?
stress rapture strength
18
What mechanical property of a material refers to the resistance to plastic deformation
hardness
19
What parameter is defined as the temperature at which the toughness of the material drops below some predetermined value, usually 15ft-lb?
Nil ductility temperature
20
What is obtained by repeatedly loading a specimen at given stress levels until it fails?
endurance limit or fatigue strength of material
21
What dimensional property of a material refers to the deviation from edge straightness?
camber
22
What dimensional property of a material refers to a wavelike variation from a perfect surface, generally much wider in spacing and higher in amplitude than surface roughness?
waviness
23
Wood is composed of chains of cellulose molecules bonded together by another natural polymer called ________.
lignin
24
What is a polymer production process that involves forming a polymer chain containing two different monuments?
copolymerization
25
What is the generic name of class of polymer which is commercially known as “nylon”?
Polyamide
26
By definition, a rubber is a substance that has at least _____ elongation in tensile test and is capable of returning rapidly and forcibly to its original dimensions when load is removed.
200%
27
What is a method of forming polymer sheets or films into three-dimensional shapes in which the sheet is clamped on the edge, heated until it softens and sags, drawn in contact with the mold by vacuum, and cooled while still in contact with the mold?
thermoforming
28
What is a process of forming continuous shapes by forcing a molten polymer through a metal die?
extrusion
29
What chemical property of a material which refers to its ability to resist deterioration by chemical or electrochemical reactions with environment?
corrosion resistance
30
What refers to the tendency for polymers and molecular materials to from with an ordered, spatial, three-dimensional arrangement of monomer molecules?
stereo specificity
31
What is the amount of energy required to fracture a given volume of material?
impact strength
32
What mechanical property of a material which is a time-dependent permanent strain under stress?
creep
33
What refers to the stress at which a material exhibits a specified deviation from proportionality of stress and strain?
yield strength
34
The greatest stress which a material is capable of withstanding without a deviation from acceptable of stress to strain is called _______.
proportional limit
35
What is the maximum stress below which a material can theoretically endure an infinite number of stress cycles?
endurance limit
36
What is a substance that attracts piece of iron?
magnet
37
Which of the following is a natural magnet?
lodestone
38
What is the resistance of a material to plastic deformation?
hardness
39
Which of the following materials has permeability slightly less than that of free space?
diamagnetic materials
40
What materials has permiabilities slightly greater than of free space?
paramagnetic materials
41
Which of the materials have very high permiabilities?
ferromagnetic materials
42
What is the defined by ASTM as a material that contains as an essential ingredient an organic substance of large molecular weight, is solid in its finished state, and some stage in its manufactured or in its processing into finished articles, can be shaped by flow?
plastic
43
Some polymetric materials such as epoxies are formed by strong primary chemical bonds called ________.
crosslinking
44
What do you call a polymer without additives and without blending with another polymer?
homo polymer
45
A large molecule with two alternating mers is called as _______.
copolymer or interpolymer
46
What term is used to describe a polymer that has rubberlike properties?
elastomer
47
What is defined as an alloy of iron and carbon, with the carbon being restricted within certain concentration limits?
steel
48
What is the most popular steel refining process or technique which involves casting of steel from the BOF or electric furnace into cylindrical ingots?
vacuum arc remelting
49
In what special refining process of steel where molten metal is poured down a tundish (chute) into an ingot mold?
electron beam refining
50
What type of steel has carbon as its principal hardening agent?
carbon steel
51
What type of steel has 0.8% carbon and 100% pearlite?
eutectoid
52
What group of steel are water-hardened tool steels?
group w
53
What group of steels are molybdenum high-speed steels?
group m
54
Steels that are used for axles, gears, and similar parts requiring medium to high and strength are known as?
medium carbon steel
55
Galvanized steel are steel products coated with _________.
zinc
56
What ASTM test for tension is designated for plastics?
D638
57
What ASTM test for compression is designated for plastic?
D695
58
What ASTM test for shear strength is designated for plastics?
D732
59
What is the ASTM tension testing designation for standard methods for steel products?
A370
60
Low-quality steels with an M suffix on the designation intended for nonstructural application is classified as ____________.
merchant quality
61
The use of acids to remove oxides and scale on hot-worked steels is known as_______.
pickling
62
What is the purpose of molybdenum in steel alloying?
to increase dynamic and high-temperature strength and hardness
63
Which of the following statements is NOT true?
About 10% of the earth’s crust is iron.
64
What prefix in steel identification means composition varies from normal limits?
X
65
What is prefix in steel identification means it is made in an electric furnace?
E
66
What letter suffix steel identification means that it is steel with boron as an alloying element?
xxBxx
67
What refers to the tin mill steel, without a coating?
black plate
68
What combination of elements has high electrical resistance, high corrosion resistance, and high strength at red hear temperatures, making it useful in resistance heating?
nichrome
69
A steel cannot qualify for stainless prefix until it has at least how many percent of chromium?
10%
70
Which of the following cast irons is a high-carbon, iron-carbon-silicon alloy?
deoxidizers
71
Which of the following cast irons is a high-carbon-silicon alloy?
gray iron
72
Which of the following cast irons is heat-treated for ductility?
malleable iron
73
Which cast iron is hard and wear resistant?
white iron
74
What is considered as the general purpose oldest type and widely used cast iron?
gray iron
75
What is the effect if manganese in cast iron?
To reduce hardness by combining with sulfur below 0.5% and increase hardness above 0.5%
76
What is the effect of aluminum in cast iron?
To deoxidize molten cast iron
77
What is the effect of silicon in cast iron?
Softens iron and increase ductility below 3.25% hardens iron above 3.25% and increase acid and corrosion resistance above 13%
78
Iron is said to be abundant in nature. About how many percent of the earth’s crust is iron?
5%
79
What is the advantage of quench hardening?
all of the choices
80
What is the lowest-temperature diffusion-hardening process and does not require a quench?
nitriding
81
The following statements are true except one. Which one?
Quench-hardened steel does not require tempering to prevent brittleness.
82
Which of the following is a requirement for hardening a steel?
all of the choices
83
What field of study encompasses the procurement and production of metals?
metallurgy
84
What do you call earth and stone missed with the iron oxides?
gangue
85
What is a coal that has been previously burned in an oxygen-poor environment?
coke
86
What is the most common alloying ingredient in copper?
zinc
87
What refers to the casehardening process by which the carbon content of the steel ear the surface of a part is increased?
carburizing
88
What is the process of heating a hardened steel to any temperature below the lower critical temperature, followed by any desired rate of cooling?
tempering
89
What is defined as an intimate mechanical mixture of two or more phases having a definite composition and a definite temperature of transformation within the solid state?
eutectoid
90
What is the most undesirable of all the elements commonly found in steels?
phosphorus
91
What is a method of casehardening involving diffusion in which the steel to be casehardened is machined, heat-treated, placed in an air-tight box and heated to about 1000oF?
nitriding
92
What typical penetrator is used in Brinell hardness test?
10 mm ball
93
What is the ratio of the maximum load in a tension test to the original cross-sectional area of the test bar?
tensile strength
94
What is the ratio of stress to strain in a material loaded within its elastic ranger?
module of elasticity
95
What is a measure of rigidity?
modulus of elasticity
96
In tensile testing, the increase in the gage length measured after the specimen fractures, within the gage length is called _______.
percent elongation
97
What impurity in steel can cause “red shortness”, which means the steel becomes unworkable at high temperature?
sulfur
98
What is a process of producing a hard surface in a steel having a sufficiently high carbon content to respond to hardening by a rapid cooling of the surface?
flame hardening
99
What is the common reinforcement for polymer composites?
glass fiber
100
Which of the following fluids conducts electricity?
electrolyte
Math
Math
Hazel Lynn Ramos · 95問 · 2年前Math
Math
95問 • 2年前ESAS Lesson Objectives 1
ESAS Lesson Objectives 1
Hazel Lynn Ramos · 100問 · 2年前ESAS Lesson Objectives 1
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100問 • 2年前ESAS 350 objectives 2
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44問 • 2年前EE
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Hazel Lynn Ramos · 100問 · 2年前EE
EE
100問 • 2年前EE Lesson Objectives 1
EE Lesson Objectives 1
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EE Lesson Objectives 1
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EE Lesson Objectives 2
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EE Lesson Objectives 2
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100問 • 2年前EE Terms Additional
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Hazel Lynn Ramos · 100問 · 1年前EE Terms Additional
EE Terms Additional
100問 • 1年前問題一覧
1
What are considered as the “building blocks” for engineering materials?
atoms
2
What are the major classes of engineering materials?
Metals, ceramics, polymers, semiconductors and composites
3
What types of materials behave like iron when placed in a magnetic field?
ferromagnetic materials
4
What do you call metals reinforced by ceramics or other materials, usually in fiber form?
metal matrix composites
5
What is a combination of one or more metals with a nonmetallic element?
ceramic
6
Polymer comes from Greek words “poly” which means “many” and “meros” which means __________.
part
7
The engineering materials known as “plastics” are more correctly called
polymers
8
What is a combination of two or more materials that has properties that the components materials do not have by themselves?
composite
9
What is a reference sheet for the elements that can be used to form engineering materials?
periodic table
10
What physical property of a material that refers to the point at which a material liquefies on heating or solidifies on cooling?
melting point
11
What physical property of a material that refers to the temperature at which ferromagnetic materials can no longer be magnetized by outside forces?
curie point
12
What physical property of a material refers to the amount of weight gain (%) experienced in a polymer after immersion in water for a specified length of time under a controlled environment?
water absorption
13
What physical property of a material that refers to the rate of heat flow per unit time in a homogenous material under steady-state conditions per unit are, per unit temperature gradient in a direction perpendicular to area?
thermal conductivity
14
What physical property of a material refers to the highest potential difference (voltage) that an insulting material of given thickness can withstand for a specified time without occurrence of electrical breakdown through its bulk?
dielectric strength
15
What physical property of a material refers to the ratio of the amount of heat required to raise the temperature of a unit mass of a substance 1 degree to the heat required to raise the same mass of water to 1 degree.
specific heat
16
What physical property of a material refers to the temperature at which a polymer under a specified load shows a specified amount of deflection?
heat distortion temperature
17
What mechanical property of a material refers to the nominal stress at fracture in a tension test at constant load and constant temperature?
stress rapture strength
18
What mechanical property of a material refers to the resistance to plastic deformation
hardness
19
What parameter is defined as the temperature at which the toughness of the material drops below some predetermined value, usually 15ft-lb?
Nil ductility temperature
20
What is obtained by repeatedly loading a specimen at given stress levels until it fails?
endurance limit or fatigue strength of material
21
What dimensional property of a material refers to the deviation from edge straightness?
camber
22
What dimensional property of a material refers to a wavelike variation from a perfect surface, generally much wider in spacing and higher in amplitude than surface roughness?
waviness
23
Wood is composed of chains of cellulose molecules bonded together by another natural polymer called ________.
lignin
24
What is a polymer production process that involves forming a polymer chain containing two different monuments?
copolymerization
25
What is the generic name of class of polymer which is commercially known as “nylon”?
Polyamide
26
By definition, a rubber is a substance that has at least _____ elongation in tensile test and is capable of returning rapidly and forcibly to its original dimensions when load is removed.
200%
27
What is a method of forming polymer sheets or films into three-dimensional shapes in which the sheet is clamped on the edge, heated until it softens and sags, drawn in contact with the mold by vacuum, and cooled while still in contact with the mold?
thermoforming
28
What is a process of forming continuous shapes by forcing a molten polymer through a metal die?
extrusion
29
What chemical property of a material which refers to its ability to resist deterioration by chemical or electrochemical reactions with environment?
corrosion resistance
30
What refers to the tendency for polymers and molecular materials to from with an ordered, spatial, three-dimensional arrangement of monomer molecules?
stereo specificity
31
What is the amount of energy required to fracture a given volume of material?
impact strength
32
What mechanical property of a material which is a time-dependent permanent strain under stress?
creep
33
What refers to the stress at which a material exhibits a specified deviation from proportionality of stress and strain?
yield strength
34
The greatest stress which a material is capable of withstanding without a deviation from acceptable of stress to strain is called _______.
proportional limit
35
What is the maximum stress below which a material can theoretically endure an infinite number of stress cycles?
endurance limit
36
What is a substance that attracts piece of iron?
magnet
37
Which of the following is a natural magnet?
lodestone
38
What is the resistance of a material to plastic deformation?
hardness
39
Which of the following materials has permeability slightly less than that of free space?
diamagnetic materials
40
What materials has permiabilities slightly greater than of free space?
paramagnetic materials
41
Which of the materials have very high permiabilities?
ferromagnetic materials
42
What is the defined by ASTM as a material that contains as an essential ingredient an organic substance of large molecular weight, is solid in its finished state, and some stage in its manufactured or in its processing into finished articles, can be shaped by flow?
plastic
43
Some polymetric materials such as epoxies are formed by strong primary chemical bonds called ________.
crosslinking
44
What do you call a polymer without additives and without blending with another polymer?
homo polymer
45
A large molecule with two alternating mers is called as _______.
copolymer or interpolymer
46
What term is used to describe a polymer that has rubberlike properties?
elastomer
47
What is defined as an alloy of iron and carbon, with the carbon being restricted within certain concentration limits?
steel
48
What is the most popular steel refining process or technique which involves casting of steel from the BOF or electric furnace into cylindrical ingots?
vacuum arc remelting
49
In what special refining process of steel where molten metal is poured down a tundish (chute) into an ingot mold?
electron beam refining
50
What type of steel has carbon as its principal hardening agent?
carbon steel
51
What type of steel has 0.8% carbon and 100% pearlite?
eutectoid
52
What group of steel are water-hardened tool steels?
group w
53
What group of steels are molybdenum high-speed steels?
group m
54
Steels that are used for axles, gears, and similar parts requiring medium to high and strength are known as?
medium carbon steel
55
Galvanized steel are steel products coated with _________.
zinc
56
What ASTM test for tension is designated for plastics?
D638
57
What ASTM test for compression is designated for plastic?
D695
58
What ASTM test for shear strength is designated for plastics?
D732
59
What is the ASTM tension testing designation for standard methods for steel products?
A370
60
Low-quality steels with an M suffix on the designation intended for nonstructural application is classified as ____________.
merchant quality
61
The use of acids to remove oxides and scale on hot-worked steels is known as_______.
pickling
62
What is the purpose of molybdenum in steel alloying?
to increase dynamic and high-temperature strength and hardness
63
Which of the following statements is NOT true?
About 10% of the earth’s crust is iron.
64
What prefix in steel identification means composition varies from normal limits?
X
65
What is prefix in steel identification means it is made in an electric furnace?
E
66
What letter suffix steel identification means that it is steel with boron as an alloying element?
xxBxx
67
What refers to the tin mill steel, without a coating?
black plate
68
What combination of elements has high electrical resistance, high corrosion resistance, and high strength at red hear temperatures, making it useful in resistance heating?
nichrome
69
A steel cannot qualify for stainless prefix until it has at least how many percent of chromium?
10%
70
Which of the following cast irons is a high-carbon, iron-carbon-silicon alloy?
deoxidizers
71
Which of the following cast irons is a high-carbon-silicon alloy?
gray iron
72
Which of the following cast irons is heat-treated for ductility?
malleable iron
73
Which cast iron is hard and wear resistant?
white iron
74
What is considered as the general purpose oldest type and widely used cast iron?
gray iron
75
What is the effect if manganese in cast iron?
To reduce hardness by combining with sulfur below 0.5% and increase hardness above 0.5%
76
What is the effect of aluminum in cast iron?
To deoxidize molten cast iron
77
What is the effect of silicon in cast iron?
Softens iron and increase ductility below 3.25% hardens iron above 3.25% and increase acid and corrosion resistance above 13%
78
Iron is said to be abundant in nature. About how many percent of the earth’s crust is iron?
5%
79
What is the advantage of quench hardening?
all of the choices
80
What is the lowest-temperature diffusion-hardening process and does not require a quench?
nitriding
81
The following statements are true except one. Which one?
Quench-hardened steel does not require tempering to prevent brittleness.
82
Which of the following is a requirement for hardening a steel?
all of the choices
83
What field of study encompasses the procurement and production of metals?
metallurgy
84
What do you call earth and stone missed with the iron oxides?
gangue
85
What is a coal that has been previously burned in an oxygen-poor environment?
coke
86
What is the most common alloying ingredient in copper?
zinc
87
What refers to the casehardening process by which the carbon content of the steel ear the surface of a part is increased?
carburizing
88
What is the process of heating a hardened steel to any temperature below the lower critical temperature, followed by any desired rate of cooling?
tempering
89
What is defined as an intimate mechanical mixture of two or more phases having a definite composition and a definite temperature of transformation within the solid state?
eutectoid
90
What is the most undesirable of all the elements commonly found in steels?
phosphorus
91
What is a method of casehardening involving diffusion in which the steel to be casehardened is machined, heat-treated, placed in an air-tight box and heated to about 1000oF?
nitriding
92
What typical penetrator is used in Brinell hardness test?
10 mm ball
93
What is the ratio of the maximum load in a tension test to the original cross-sectional area of the test bar?
tensile strength
94
What is the ratio of stress to strain in a material loaded within its elastic ranger?
module of elasticity
95
What is a measure of rigidity?
modulus of elasticity
96
In tensile testing, the increase in the gage length measured after the specimen fractures, within the gage length is called _______.
percent elongation
97
What impurity in steel can cause “red shortness”, which means the steel becomes unworkable at high temperature?
sulfur
98
What is a process of producing a hard surface in a steel having a sufficiently high carbon content to respond to hardening by a rapid cooling of the surface?
flame hardening
99
What is the common reinforcement for polymer composites?
glass fiber
100
Which of the following fluids conducts electricity?
electrolyte