engr materials pt 2
問題一覧
1
what is a process of producing a hard surface in a still having sufficiently high carbon content to respond to hardening by rapid cooling of the surface
flame hardening
2
what is the most common reinforcement for polymer composites
glass fiber
3
in electrochemistry , oxidation is a loss of
electron
4
what is the process of putting back the lost electrons to convert the ion back to a metal
reduction
5
oxidation in an electrochemical cell always takes place where?
at the anode
6
production in an electrochemical cell always takes place where ?
at the cathode
7
what do you call a fluid that conducts electricity
electrolyte
8
the _______ of an environment serves as a measure of the strength of acids or bases.
ph measurement
9
what is the place value for a neutral solution
7
10
the solutions with ph values from 1 to 6 are _______ .
acid
11
the solutions with ph values from 7 to 12 are ____.
alkaline
12
"pH" stands for ____.
positive hydrogen ion
13
what is defined as a local corrosion damaged characteristerized by surface cavities
pitting
14
what do you call the removal of zinc from brasses
Dezincification
15
what is the scaling of of a surface in flakes or layers as the result of corrosion
expoliation
16
what corrosion occurs under organic coatings on metals as fine, wavy hairlines?
filiform corrosion
17
what refers to the deterioration of material by oscillatory relative motion of small amplitude (20 to 100 um) between two solid surfaces in a corosive environment?
Fretting Corrosion
18
indicate the false statement about corrosion.
the corroded member in a corrosion cell is the cathode
19
steel is an alloy of iron and carbon with limits on the amount of carbon to less than ___ percent.
2
20
what is the approximate chromium range of a ferritic stainless steel
16% to 20%
21
indicate false statement about stainless steel
stainless steels have tensile moduli greater than those of carbon & alloy steels
22
what are the four major alloying elements of austenitic stainless steels
iron , chromium , carbon and nickel
23
the electrical resistance of stainless steels can be as much as _____ times that of carbon steel
6
24
what refers to a shape achieved by allowing a liquid to solidify in a mold?
casting
25
which of the following is not a hardware requirement for die casting?
metal mold (maching halves)
26
what cast iron has nojular or spheroidal graphite
ductile iron
27
what is a process for making glass reinforced shapes that can be generated by pulling resin impregnated glass stands through a die
continuous pultrusion
28
what is a natural substance that makes up a significant portion of all plant life
cellulose
29
what term is used to denote a family of thermosetting polymers that are reaction products of alcohols and acids
alkydes
30
what is the AISI-SAE steel designation for nickel 3.50 alloy
23XX
31
what is the AISI-SAE designation for resulfurized and rephosphorized carbon steel
12XX
32
the group H steels can be used in what temperature range
600°C to 1100°C
33
The following are primary alloying ingredients of group H steels except:
cobalt
34
the chrome molybdenum steels contain how many percent of molybdenum?
0.20
35
the chrome vanadium steels contain how many percent of vanadium ?
0.15 to 0.30
36
manganese steel usually contains how many percent of manganese ?
11 to 14
37
the wear resistance of this material is attributed to its ability to _______, that is , the hardness is increased greatly when the still is cold worked.
strain harden
38
the special chrome steals of the stainless variety contain how many percent of chromium
11 to 17
39
what refers to the application of any process whereby the surface of still is altered so that it will become hard ?
casehardening
40
what refers to the ability of steel to be hardened through its center in large section
hardenability
41
what is the equilibrium temperature of transformation of austenite to pearlite?
1333°F
42
what structure is formed when transformation occurs at temperatures down to the knee of the curve ?
pearlite
43
what allotropic form of iron refers to iron that has a temperature range of room temperature to 1670°F
alpha iron
44
the alpha when will become paramagnetic at temperature above _____.
770°C
45
what still surface hardening process requires heating at 1000°F for up to 100 hours in an ammonia atmosphere, followed by slow cooling
nitriding
46
what is the chief ore of tin
cassiterite
47
what is the chief ore of zinc
sphalerite
48
what is the chief ore of titanium
ilmanite
49
what is a mixture of gibbsite and diaspore , of which aluminium is derived
bauxite
50
the term brass is very commonly used to designate any alloy primarily _____and _____.
copper and zinc
51
the term brown's is used to designate any alloy containing
copper and tin
52
in a system of designating wrought aluminum alloys , a four digit number is used . what does the first digit indicates
the alloy group
53
in a system of designating wrought aluminum alloys , what does the second digit represents ?
the modifications of the alloy group or impurity limits
54
in a system of designating wrought atom alloys , the letter f that follows the number indicates what condition of alloy
as fabricated
55
the following alloys are the chief alloys that are diecast except:
manganese alloys
56
what is the minimum tensile strength of gray cast iron class 50
50,000 lbf/in^2
57
what is a carbon content of wrought iron
less than 0.1%
58
alnico is an alloy containing how many percent nickel
14%
59
the most common beta brass with the composition of 60% and 40% zinc is called ______.
Muntz metal
60
red brass contains about how many percent of the zinc
15%
61
yellow brass contains how many percent of zinc
30%
62
indicate the false statement
tin is relatively soluble in copper
63
what is the most abundant metal in nature
aluminium
64
indicate the false statement about aluminium
it has poor thermal and electrical conductivity
65
what is the effect to aluminium with iron as the alloying element
reduce hot cracking tendencies in casting
66
what is the effect to aluminum with copper as alloying element
increases strength up to about 12%
67
which of the following are two well-known legal alerts with magnetic properties ideal for permanent magnet
alnico and cunife
68
the portland cement is manufactured from the following elements except:
asphalt
69
what gives the average ratio of stress to strain for materials operating in the nonlinear region in the stress-strain diagram
secant Modulus
70
what is the ratio of the ultimate failure strain to the yielding strain
ductility
71
what test determines the hardenability of a steel specimen
jominy end-quench test
72
what steel relief process is used with steels with hypoeutectoid steels to change martenite into pearlite
tempering
73
what is another term for tempering
drawing or toughening
74
all are steel surface hardening process except
annealing
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Yaku Yaku Shii · 41問 · 2年前electives
electives
41問 • 2年前問題一覧
1
what is a process of producing a hard surface in a still having sufficiently high carbon content to respond to hardening by rapid cooling of the surface
flame hardening
2
what is the most common reinforcement for polymer composites
glass fiber
3
in electrochemistry , oxidation is a loss of
electron
4
what is the process of putting back the lost electrons to convert the ion back to a metal
reduction
5
oxidation in an electrochemical cell always takes place where?
at the anode
6
production in an electrochemical cell always takes place where ?
at the cathode
7
what do you call a fluid that conducts electricity
electrolyte
8
the _______ of an environment serves as a measure of the strength of acids or bases.
ph measurement
9
what is the place value for a neutral solution
7
10
the solutions with ph values from 1 to 6 are _______ .
acid
11
the solutions with ph values from 7 to 12 are ____.
alkaline
12
"pH" stands for ____.
positive hydrogen ion
13
what is defined as a local corrosion damaged characteristerized by surface cavities
pitting
14
what do you call the removal of zinc from brasses
Dezincification
15
what is the scaling of of a surface in flakes or layers as the result of corrosion
expoliation
16
what corrosion occurs under organic coatings on metals as fine, wavy hairlines?
filiform corrosion
17
what refers to the deterioration of material by oscillatory relative motion of small amplitude (20 to 100 um) between two solid surfaces in a corosive environment?
Fretting Corrosion
18
indicate the false statement about corrosion.
the corroded member in a corrosion cell is the cathode
19
steel is an alloy of iron and carbon with limits on the amount of carbon to less than ___ percent.
2
20
what is the approximate chromium range of a ferritic stainless steel
16% to 20%
21
indicate false statement about stainless steel
stainless steels have tensile moduli greater than those of carbon & alloy steels
22
what are the four major alloying elements of austenitic stainless steels
iron , chromium , carbon and nickel
23
the electrical resistance of stainless steels can be as much as _____ times that of carbon steel
6
24
what refers to a shape achieved by allowing a liquid to solidify in a mold?
casting
25
which of the following is not a hardware requirement for die casting?
metal mold (maching halves)
26
what cast iron has nojular or spheroidal graphite
ductile iron
27
what is a process for making glass reinforced shapes that can be generated by pulling resin impregnated glass stands through a die
continuous pultrusion
28
what is a natural substance that makes up a significant portion of all plant life
cellulose
29
what term is used to denote a family of thermosetting polymers that are reaction products of alcohols and acids
alkydes
30
what is the AISI-SAE steel designation for nickel 3.50 alloy
23XX
31
what is the AISI-SAE designation for resulfurized and rephosphorized carbon steel
12XX
32
the group H steels can be used in what temperature range
600°C to 1100°C
33
The following are primary alloying ingredients of group H steels except:
cobalt
34
the chrome molybdenum steels contain how many percent of molybdenum?
0.20
35
the chrome vanadium steels contain how many percent of vanadium ?
0.15 to 0.30
36
manganese steel usually contains how many percent of manganese ?
11 to 14
37
the wear resistance of this material is attributed to its ability to _______, that is , the hardness is increased greatly when the still is cold worked.
strain harden
38
the special chrome steals of the stainless variety contain how many percent of chromium
11 to 17
39
what refers to the application of any process whereby the surface of still is altered so that it will become hard ?
casehardening
40
what refers to the ability of steel to be hardened through its center in large section
hardenability
41
what is the equilibrium temperature of transformation of austenite to pearlite?
1333°F
42
what structure is formed when transformation occurs at temperatures down to the knee of the curve ?
pearlite
43
what allotropic form of iron refers to iron that has a temperature range of room temperature to 1670°F
alpha iron
44
the alpha when will become paramagnetic at temperature above _____.
770°C
45
what still surface hardening process requires heating at 1000°F for up to 100 hours in an ammonia atmosphere, followed by slow cooling
nitriding
46
what is the chief ore of tin
cassiterite
47
what is the chief ore of zinc
sphalerite
48
what is the chief ore of titanium
ilmanite
49
what is a mixture of gibbsite and diaspore , of which aluminium is derived
bauxite
50
the term brass is very commonly used to designate any alloy primarily _____and _____.
copper and zinc
51
the term brown's is used to designate any alloy containing
copper and tin
52
in a system of designating wrought aluminum alloys , a four digit number is used . what does the first digit indicates
the alloy group
53
in a system of designating wrought aluminum alloys , what does the second digit represents ?
the modifications of the alloy group or impurity limits
54
in a system of designating wrought atom alloys , the letter f that follows the number indicates what condition of alloy
as fabricated
55
the following alloys are the chief alloys that are diecast except:
manganese alloys
56
what is the minimum tensile strength of gray cast iron class 50
50,000 lbf/in^2
57
what is a carbon content of wrought iron
less than 0.1%
58
alnico is an alloy containing how many percent nickel
14%
59
the most common beta brass with the composition of 60% and 40% zinc is called ______.
Muntz metal
60
red brass contains about how many percent of the zinc
15%
61
yellow brass contains how many percent of zinc
30%
62
indicate the false statement
tin is relatively soluble in copper
63
what is the most abundant metal in nature
aluminium
64
indicate the false statement about aluminium
it has poor thermal and electrical conductivity
65
what is the effect to aluminium with iron as the alloying element
reduce hot cracking tendencies in casting
66
what is the effect to aluminum with copper as alloying element
increases strength up to about 12%
67
which of the following are two well-known legal alerts with magnetic properties ideal for permanent magnet
alnico and cunife
68
the portland cement is manufactured from the following elements except:
asphalt
69
what gives the average ratio of stress to strain for materials operating in the nonlinear region in the stress-strain diagram
secant Modulus
70
what is the ratio of the ultimate failure strain to the yielding strain
ductility
71
what test determines the hardenability of a steel specimen
jominy end-quench test
72
what steel relief process is used with steels with hypoeutectoid steels to change martenite into pearlite
tempering
73
what is another term for tempering
drawing or toughening
74
all are steel surface hardening process except
annealing