Engineering Materials
問題一覧
1
What property of an element is determined by the number of protons in
its nucleus?
atomic number
2
what do you call the electrons at the outermost shell of an atom
valence electrons
3
The mass of a neutron is approximately how many times greater than
the mass of an electron?
1839
4
what is the mass in grams of an electron
9.107 x 10^28
5
The mass of a proton is approximately how many times greater than the
mass of an electron?
1836
6
What is the mass (in grams) of a proton?
C. 1.672 X 10^-24
7
What is the mass (in grams) of neutron?
1.675x10^-24
8
what is the charge of an electron
-1.601x10^-19 coulombs
9
what is the charge of a proton
1.601x10 -19 coulombs
10
what types of materials behave like iron when placed in a magnetic field
ferromagnetic materials
11
what do you call the distinct pattern in space which the atoms of metal arrange themselves when they combined to produce substance of recognizable size
space lattice
12
what are considered as the building blocks for engineering materials
atoms
13
what is a pure substance that cannot be broken down by chemical means to simpler substance
element
14
what determines the ability of atoms to combine with other atoms
valence electrons
15
what is generally accepted nominal mass of a proton
1 AMU
16
what is the term used to describe the amount of energy that is given off when an electron moves from one orbit to a lower orbit
Quantum
17
what refers to a metal combined with one or more other elements?
alloy
18
what refers to chemical combined elements with definite proportions of the component elements
compound
19
what refers to physical blend of two or more substances
mixture
20
what is the smallest part of a compound that still retains the properties of that compound
molecule
21
what is a solid has a crystalline structure, the atoms arranged in repeating structures called _______.
unit cell
22
what type of bonding refers to the sharing of electrons
covalent bonding
23
what refers to a crystal infection characterized by regions of severe atomic misfit where atoms are not properly surrounded by neighbor atoms
dislocation
24
what do you call metals reinforced by ceramics or other materials, usually in fiber form
metal matrix composites
25
what is the usual valence of non-metallic elements
all of the choices
26
metalloids have a valence of
4
27
what do you call an atom that has lost or gain an electron
ion
28
what is a combination of one or more metals with a non-metallic element
ceramic
29
what do you call an atom that has lost or gain an electron
ion
30
.Polymer comes from Greek words "poly" which means "many" and
"meros" which means
part
31
The engineering materials known as "plastics" are more correctly called
polymers
32
What is a combination of two or more materials that has properties that
the components materiais do hot have by themselves?
composite
33
what is a reference sheet for the elements that can be used to form engineering materials
periodic table
34
who has been accepted as the author of the periodic table which was developed by chemist in the mid 19th century
mendeleev
35
what physical property of a material that refers to the point at which a material liquefies on heating or solidifies on cooling
melting point
36
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
37
what is the ratio of the velocity of light in a vacuum to its velocity in another material
refractive index
38
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 area, per unit temperature gradient in a direction perpendicular
to area?
thermal conductivity
39
. What is the absolute value of the ratio of the transverse strain to the
corresponding axial strain in a body subjected to uniaxial stress?
Poisson's ratio
40
What physical property of a material refers to the highest potential
difference (voltage) that an insulating material of given thickness can
withstand for a specified time without occurrence of eiectrical
breakdown through its bulk?
dielectric strength
41
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
42
- 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
43
what mechanical property of a material refers to the nominal stress at fracture in a tension test at constant load and constant temperature
stress rupture strength
44
what mechanical property of a material refers to the resistance of plastic deformation
hardness
45
what typical penetrator is used in Brinell hardness test
10mm ball
46
What parameter is defined as the ternperature at which the toughness
of the material drops below some predetermined value, usualy 15 ft-lb?
Nil ductility temperature
47
what is obtained by repeatedly loading a specimen at given stress levels until it fails
endurance limit or fatigue strength of a material
48
what dimensional property of a material refers to the deviation from edge straightness
Camber
49
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
50
which is composed of chains of cellulose molecules bonded together by another natural polymer called
lignin
51
what is a polymer production process that involves forming a polymer chain containing two different monomers
copolymerization
52
what is the generic name of a class of polymer which is commercially known as nylon
polyamide
53
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%
54
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 cold while still in contact with the mold
thermoforming
55
what is the process of forming continuous shapes by forcing a molten polymer through a metal die
extrusion
56
what chemical property of a material which refers to its ability to resist deterioration by chemical or electrochemical reactions with environment?
corrosion resistance
57
what is the ratio of the maximum load in a tension test to the original cross-sectional area of the testbar
tensile strength
58
what is the ratio of stress to strain or material loaded within its elastic range
modulus of elasticity
59
measure of rigidity
modulus of elasticity
60
the greatest stress which a material is capable of withstanding without a deviation from acceptable of stress to strain is called
proportional limit
61
what refers to the stress at which a material exhibits a specified deviation from the personality of stress and strain
yield strength
62
what is the amount of energy required to fracture a given volume of material
impact strength
63
What mechanical property of a material which is a time-dependent permanent strain under stress
creep
64
in tensile testing, the increase in the gage length measured after the specimen fractures within the gage length of is called
percent elongation
65
what is the resistance of a material to plastic deformation
hardness
66
what is the maximum stress below which a material can theoretically endure an infinite number of stress cycles
endurance limit
67
a substance that attracts a piece of iron
magnet
68
which of the following is a natural magnet
Lodestone
69
has permeability slightly less than that of free space
diamagnetic materials
70
has slightly greater than that of free space
paramagnetic materials
71
have very high permeability
ferromagnetic material
72
astm stands for
american society for testing and materials
73
what prefix in steel identification means composition varies from normal limits ?
x
74
what prefix in steel identification means it is made in an electrical furnace ?
E
75
what letter suffix in steel identification means that it is steel with boron as an alloying element
xxBxx
76
what do you call tin mill steel without a coating ?
black plate
77
what combination of elements has high electrical resistance , high corrosion resistance , and high strength at red heat temperatures , making it useful in resistance heating?
nichrome
78
a steel cannot qualify for stainless prefix until it has at least how many percent of chromium ?
10%
79
what do you add to compensate for the remaining high iron oxide content of the steel
Deoxidizers
80
which of the following cast irons is heat treated for ductility
malleable iron
81
which cast iron is hard and wear-resistant
white iron
82
what is considered as the general-purpose, oldest type and widely used cast iron ?
gray iron
83
the effect of manganese in cast irons is to
reduce hardness by combining with sulfur below 0.5% and increased hardness above 0.5%
84
the effect of aluminum in cast iron is to
deoxidize modern cast iron
85
the effect of silicon in cast iron is to
softens iron and increases ductility below 3.25% , hardens iron above 3.25% and increase acid and corrosion resistance above 13%
86
iron is said to be abundant in nature . about how many percent of the earth's crust is iron
5%
87
what is the advantage of quench hardening
improve strength hardness wear characteristics (all of the above)
88
what is the lowest temperature diffusion hardening process and does not require a quench
nitriding
89
the following statements are true except one. which one?
quench hardened steel does not require tempering to prevent brittleness
90
which of the following is a requirement for hardening a steel
all of the choices
91
what field of study and compasses the procurement and production of metals
metallurgy
92
what do you call earth and stone missed with the iron oxide
gangue
93
what is a coal that has been previously burned in an oxygen poor environment
coke
94
what is the most common alloying ingredient in copper
zinc
95
what refers to the case hardening process by which the carbon content of the steel near the surface of a part is increased?
carburizing
96
what is the process of heating a hardened steel to any temperature below critical temperature, followed by any desired rate of cooling
tempering
97
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
98
what is the most undesirable of all elements commonly found in steels
phosphorus
99
what impurity in still can cause "red shortness" which means the steel becomes unworkable at high temperature
sulfur
100
what is a method of case hardening involving the fusion in which the steel to be case hardened is machined , heat-treated , placed in an airtight box and heated to about 1,000 degrees fahrenheit ?
nitriding
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41問 • 2年前問題一覧
1
What property of an element is determined by the number of protons in
its nucleus?
atomic number
2
what do you call the electrons at the outermost shell of an atom
valence electrons
3
The mass of a neutron is approximately how many times greater than
the mass of an electron?
1839
4
what is the mass in grams of an electron
9.107 x 10^28
5
The mass of a proton is approximately how many times greater than the
mass of an electron?
1836
6
What is the mass (in grams) of a proton?
C. 1.672 X 10^-24
7
What is the mass (in grams) of neutron?
1.675x10^-24
8
what is the charge of an electron
-1.601x10^-19 coulombs
9
what is the charge of a proton
1.601x10 -19 coulombs
10
what types of materials behave like iron when placed in a magnetic field
ferromagnetic materials
11
what do you call the distinct pattern in space which the atoms of metal arrange themselves when they combined to produce substance of recognizable size
space lattice
12
what are considered as the building blocks for engineering materials
atoms
13
what is a pure substance that cannot be broken down by chemical means to simpler substance
element
14
what determines the ability of atoms to combine with other atoms
valence electrons
15
what is generally accepted nominal mass of a proton
1 AMU
16
what is the term used to describe the amount of energy that is given off when an electron moves from one orbit to a lower orbit
Quantum
17
what refers to a metal combined with one or more other elements?
alloy
18
what refers to chemical combined elements with definite proportions of the component elements
compound
19
what refers to physical blend of two or more substances
mixture
20
what is the smallest part of a compound that still retains the properties of that compound
molecule
21
what is a solid has a crystalline structure, the atoms arranged in repeating structures called _______.
unit cell
22
what type of bonding refers to the sharing of electrons
covalent bonding
23
what refers to a crystal infection characterized by regions of severe atomic misfit where atoms are not properly surrounded by neighbor atoms
dislocation
24
what do you call metals reinforced by ceramics or other materials, usually in fiber form
metal matrix composites
25
what is the usual valence of non-metallic elements
all of the choices
26
metalloids have a valence of
4
27
what do you call an atom that has lost or gain an electron
ion
28
what is a combination of one or more metals with a non-metallic element
ceramic
29
what do you call an atom that has lost or gain an electron
ion
30
.Polymer comes from Greek words "poly" which means "many" and
"meros" which means
part
31
The engineering materials known as "plastics" are more correctly called
polymers
32
What is a combination of two or more materials that has properties that
the components materiais do hot have by themselves?
composite
33
what is a reference sheet for the elements that can be used to form engineering materials
periodic table
34
who has been accepted as the author of the periodic table which was developed by chemist in the mid 19th century
mendeleev
35
what physical property of a material that refers to the point at which a material liquefies on heating or solidifies on cooling
melting point
36
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
37
what is the ratio of the velocity of light in a vacuum to its velocity in another material
refractive index
38
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 area, per unit temperature gradient in a direction perpendicular
to area?
thermal conductivity
39
. What is the absolute value of the ratio of the transverse strain to the
corresponding axial strain in a body subjected to uniaxial stress?
Poisson's ratio
40
What physical property of a material refers to the highest potential
difference (voltage) that an insulating material of given thickness can
withstand for a specified time without occurrence of eiectrical
breakdown through its bulk?
dielectric strength
41
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
42
- 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
43
what mechanical property of a material refers to the nominal stress at fracture in a tension test at constant load and constant temperature
stress rupture strength
44
what mechanical property of a material refers to the resistance of plastic deformation
hardness
45
what typical penetrator is used in Brinell hardness test
10mm ball
46
What parameter is defined as the ternperature at which the toughness
of the material drops below some predetermined value, usualy 15 ft-lb?
Nil ductility temperature
47
what is obtained by repeatedly loading a specimen at given stress levels until it fails
endurance limit or fatigue strength of a material
48
what dimensional property of a material refers to the deviation from edge straightness
Camber
49
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
50
which is composed of chains of cellulose molecules bonded together by another natural polymer called
lignin
51
what is a polymer production process that involves forming a polymer chain containing two different monomers
copolymerization
52
what is the generic name of a class of polymer which is commercially known as nylon
polyamide
53
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%
54
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 cold while still in contact with the mold
thermoforming
55
what is the process of forming continuous shapes by forcing a molten polymer through a metal die
extrusion
56
what chemical property of a material which refers to its ability to resist deterioration by chemical or electrochemical reactions with environment?
corrosion resistance
57
what is the ratio of the maximum load in a tension test to the original cross-sectional area of the testbar
tensile strength
58
what is the ratio of stress to strain or material loaded within its elastic range
modulus of elasticity
59
measure of rigidity
modulus of elasticity
60
the greatest stress which a material is capable of withstanding without a deviation from acceptable of stress to strain is called
proportional limit
61
what refers to the stress at which a material exhibits a specified deviation from the personality of stress and strain
yield strength
62
what is the amount of energy required to fracture a given volume of material
impact strength
63
What mechanical property of a material which is a time-dependent permanent strain under stress
creep
64
in tensile testing, the increase in the gage length measured after the specimen fractures within the gage length of is called
percent elongation
65
what is the resistance of a material to plastic deformation
hardness
66
what is the maximum stress below which a material can theoretically endure an infinite number of stress cycles
endurance limit
67
a substance that attracts a piece of iron
magnet
68
which of the following is a natural magnet
Lodestone
69
has permeability slightly less than that of free space
diamagnetic materials
70
has slightly greater than that of free space
paramagnetic materials
71
have very high permeability
ferromagnetic material
72
astm stands for
american society for testing and materials
73
what prefix in steel identification means composition varies from normal limits ?
x
74
what prefix in steel identification means it is made in an electrical furnace ?
E
75
what letter suffix in steel identification means that it is steel with boron as an alloying element
xxBxx
76
what do you call tin mill steel without a coating ?
black plate
77
what combination of elements has high electrical resistance , high corrosion resistance , and high strength at red heat temperatures , making it useful in resistance heating?
nichrome
78
a steel cannot qualify for stainless prefix until it has at least how many percent of chromium ?
10%
79
what do you add to compensate for the remaining high iron oxide content of the steel
Deoxidizers
80
which of the following cast irons is heat treated for ductility
malleable iron
81
which cast iron is hard and wear-resistant
white iron
82
what is considered as the general-purpose, oldest type and widely used cast iron ?
gray iron
83
the effect of manganese in cast irons is to
reduce hardness by combining with sulfur below 0.5% and increased hardness above 0.5%
84
the effect of aluminum in cast iron is to
deoxidize modern cast iron
85
the effect of silicon in cast iron is to
softens iron and increases ductility below 3.25% , hardens iron above 3.25% and increase acid and corrosion resistance above 13%
86
iron is said to be abundant in nature . about how many percent of the earth's crust is iron
5%
87
what is the advantage of quench hardening
improve strength hardness wear characteristics (all of the above)
88
what is the lowest temperature diffusion hardening process and does not require a quench
nitriding
89
the following statements are true except one. which one?
quench hardened steel does not require tempering to prevent brittleness
90
which of the following is a requirement for hardening a steel
all of the choices
91
what field of study and compasses the procurement and production of metals
metallurgy
92
what do you call earth and stone missed with the iron oxide
gangue
93
what is a coal that has been previously burned in an oxygen poor environment
coke
94
what is the most common alloying ingredient in copper
zinc
95
what refers to the case hardening process by which the carbon content of the steel near the surface of a part is increased?
carburizing
96
what is the process of heating a hardened steel to any temperature below critical temperature, followed by any desired rate of cooling
tempering
97
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
98
what is the most undesirable of all elements commonly found in steels
phosphorus
99
what impurity in still can cause "red shortness" which means the steel becomes unworkable at high temperature
sulfur
100
what is a method of case hardening involving the fusion in which the steel to be case hardened is machined , heat-treated , placed in an airtight box and heated to about 1,000 degrees fahrenheit ?
nitriding