met
問題一覧
1
fire assaying is considered
gravimetric
2
gold is soluble in
aqua regia
3
flour is used in assaying as
reducing agent
4
the step in assaying that forms the dore
cuppellation
5
soda ash is a powerful
basic flux
6
this formula of iron oxide and silica FeOSiO2 is
bisilicate
7
in fission, process in assaying the reagent that enhance fluidity is
soda ash
8
the artificial sulfide formed in the dry way in assaying
matte
9
an alloy sufficient in precious metals bearing in economic significance
bullion
10
the assay of gold bullion is expressed as
fineness
11
the chiddy method is applicable in analyzing
Au in Cyanide solution
12
slag factor is
ratio of the oxygen in the acid component
13
the method of assaying carried out in a shallow clay dish by oxidizing fusion is called
scorification
14
the element that causes frequent trouble in Ag
Bi
15
an in-quart is added to
establish the ideal silver to gold ratio to enhance parting
16
slag in the process of fussion becomes very viscous due to
insufficient fusion time
17
one purpose of charge calculatoon is to
control sizes of button
18
in assaying loaded carbon, the oxidizing agent is used is
niter
19
The reducing power of pyrite when soda ash is added is
increased
20
an assay ton is
29.199gm
21
silica is
acid flux
22
for sulfide ores, we use
niter
23
the step where the Pb is oxidized is called
cupellation
24
mercury vaporizes
3690C
25
the allpy of gold and silver produces after cupellation
dore
26
the reducing power of flour is
10
27
to prepare cupel, the principal component is
bone ash
28
the ideal size of Pb button is
25gm
29
the oxidising power of niter is
4
30
12 karat gold is
50% Au
31
reducing power of niter or salt peter is
4.2
32
what is the maximum temperature for the fusion stage
1200 degrees
33
which of the following are undesirables in fire assaying
matte and speiss
34
which among the following is not a classification of slag material
pentasilicate slag
35
one AT or assay ton is equivalent to
29.199g
36
in the general sampling procedure, the first lot should be what size wrt whole lot
20%
37
in fire assaying, it is the temperature wherein litharge melts?
883degrees
38
the dilute acid used in fire assaying is
dilute nitric acid
39
the cupel is made of what material
sheep bone ash
40
it is the fusion stage wherein the reaction involves the evolution of gases
2nd stage
41
borax melts at what temperature
560 degrees
42
what does salt do in fire assaying
cover and wash
43
in fire assaying the oxidation of Pb and PbO is
exothermic
44
which of the following arr examples of neutral flux
fluorspar and cryolite
45
it is an artificial metallic arsenide o antimonide formed during smelting operation. in fire assaying, it is in the form as an arsenide of iron
speiss
46
this is an active readily fusible acid flux. it is often used as a cover for crucible fusion
borax
47
the readily fusible acid flux. it is depxidizing desulfurizing agent and when reduce, applies the metal necessary for the collection of gold and silver
PbO
48
powerful oxidizing agent. it is in fire assat to oxidize sulphides arsenic, etc. when present in large amount it causes boiling of the crucible charge and necessitates careful heating to prevent loss. what is the oxidizing agent.
niter
49
the lead button is separated crom the slag and then treated by thus process. this consists of oxidizing fusion in porous vessel
cupellation
50
which of the following is an important characteristic of chemical grade chromite
high Cr:Fe ratio
51
in gyratory crusher, what do you call the moving or gyrating component of the crusher
cone head
52
which of the following is a chemical derivative product of chemical grade chromite and is base material in the manufacture kf other value added chrome based industrial product
chromic acid
53
gold is widely used in which of the following industries
electronic or microchips industry
54
in recovering gold from an amalgam, what do you call the process of precipitating the mercury to free the gold the. later condensing the same to recover the mercury for possible re-use
retorting
55
in the conventional belt conveyor arrangement drive motors are often manufactured at high RPM. this is translated to a speed optimum for material belt conveyance by which of the following equipment
gear box
56
in a lab test of effluent samples, ferrous sulfate is precipitated into ferric hydroxide after hydrolysis. the resulting reaction also produces sulfuric acid (H2SO4). once the H2SO4 is made to react with quick lime (CaO), it produces the following product
CaSO4 + H2O
57
in fire assaying, which of the following is an bactive and readily fusible acid flux often used as a cover for fusion in crucibles or furnace vats
borax
58
in fire assaying the bead sometimes contains very little silver to part and therefore it is necessary to alloy it with more silver. what do you cqll this process
inquartation
59
what is the product when the metallurgical chromite is smelted
ferrochrome
60
which of the following refers to the process of reducing rocks and or minerals to certain desired size or sizes where optimum mineral liberation attained
comminution
61
which of the following grinding equipment uses various steel materials and hard rocks of assorted sizes and shapes such as pre cut drill steels or rods, scrap iron, etc as main grinding medium
pebble mill
62
what do you call the process of taking a small portion of a body as a replresentative of a larger volume and is done in a regular and mechanical manner as possible
sampling
63
which of the following gold recovery processes refers to the dissolution of gold in mercury
amalgamation
64
which of the following refers to the process of recovering economic metals loke copper and gold from low grade ores by treating them with chemicals at controlled pH to dissolve the subject metals and later precipitate the sane with other agents
leaching
65
in the principle of flotation, what do you call the reagents that are used to create vigorous effervescence or repellant bubbles in the slurry
frothers
66
in conventional screw classifier, what do you call the overflow product
slimes
67
copper oxides cannot be recovered by flotation without prior subjecting them to which of the following
sulfidization
68
which of the following is the product of smelting iron ores with high charge of silica
ferro silicon
69
which of the following is the product of smelting iron ores with high charge of pyrolusite
ferro manganese
70
which of the following elements is strategic and beneficial in flash smelting process due to its contribution in reducing energy consumption in the furnace. this element produces heat during smelting
sulfur
71
in the recovery of gold through counter current decantation processor CCD, what is the best and most economicak precipitating agent of gold from the pregnant solution using the merril crowe technology
zinc dust
72
in the operation high capacity hydrocyclones in closed circuit with large ball mills, which of the following is the overflow product from the hydrocyclone? this product is pumped to the flotation banks for mineral recovery
fine materials or slimes
73
in dewatering of mineral concentrates, which of the following filter equipment is fitted with a number of rotating circular plate-like filter elements wrapped with filter cloths. these are connected to a common vacuum pump that suctions water as the rotating filter plates are immersed in a thicknened concentrate pulp
disc filter
74
why there is a need to pelletize mineral concentrates beforecharging the same into a blast furnace
prevent fine concentrates from being blown off by strong air flow in the surface
75
the previously uncontrolled mill tailings disposal of diwalwal gold rush area has environmentally damaged the downstream farmlands of compostela valley due to which of the following
all of these
76
in a jaw crusher, what do you call that part is stationary but is in direct contact with the material to be crushed
fixed jaw
77
what do you call the process of separating minerals by taking advantages of their gravitt differentials thru continuous shaking motion whereby the heavier materials are left behindqnd carried down by
tabling
78
in a screw classifier arrangement, what do you call the screw like mechanism that elevates the sand from the slimes thereby affecting separation
flight
79
which of the following equipment is traditionally used in washing manufactured sand from the crushing plangs? it aksi separates the washed sand from waste water containing slimes?
sand classifier
metallurgy 1
metallurgy 1
ユーザ名非公開 · 100問 · 2年前metallurgy 1
metallurgy 1
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Metallurgy 2
Metallurgy 2
ユーザ名非公開 · 100問 · 2年前Metallurgy 2
Metallurgy 2
100問 • 2年前ユーザ名非公開
metallurgy 3
metallurgy 3
ユーザ名非公開 · 66問 · 2年前metallurgy 3
metallurgy 3
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mine econ
mine econ
ユーザ名非公開 · 40問 · 1年前mine econ
mine econ
40問 • 1年前ユーザ名非公開
問題一覧
1
fire assaying is considered
gravimetric
2
gold is soluble in
aqua regia
3
flour is used in assaying as
reducing agent
4
the step in assaying that forms the dore
cuppellation
5
soda ash is a powerful
basic flux
6
this formula of iron oxide and silica FeOSiO2 is
bisilicate
7
in fission, process in assaying the reagent that enhance fluidity is
soda ash
8
the artificial sulfide formed in the dry way in assaying
matte
9
an alloy sufficient in precious metals bearing in economic significance
bullion
10
the assay of gold bullion is expressed as
fineness
11
the chiddy method is applicable in analyzing
Au in Cyanide solution
12
slag factor is
ratio of the oxygen in the acid component
13
the method of assaying carried out in a shallow clay dish by oxidizing fusion is called
scorification
14
the element that causes frequent trouble in Ag
Bi
15
an in-quart is added to
establish the ideal silver to gold ratio to enhance parting
16
slag in the process of fussion becomes very viscous due to
insufficient fusion time
17
one purpose of charge calculatoon is to
control sizes of button
18
in assaying loaded carbon, the oxidizing agent is used is
niter
19
The reducing power of pyrite when soda ash is added is
increased
20
an assay ton is
29.199gm
21
silica is
acid flux
22
for sulfide ores, we use
niter
23
the step where the Pb is oxidized is called
cupellation
24
mercury vaporizes
3690C
25
the allpy of gold and silver produces after cupellation
dore
26
the reducing power of flour is
10
27
to prepare cupel, the principal component is
bone ash
28
the ideal size of Pb button is
25gm
29
the oxidising power of niter is
4
30
12 karat gold is
50% Au
31
reducing power of niter or salt peter is
4.2
32
what is the maximum temperature for the fusion stage
1200 degrees
33
which of the following are undesirables in fire assaying
matte and speiss
34
which among the following is not a classification of slag material
pentasilicate slag
35
one AT or assay ton is equivalent to
29.199g
36
in the general sampling procedure, the first lot should be what size wrt whole lot
20%
37
in fire assaying, it is the temperature wherein litharge melts?
883degrees
38
the dilute acid used in fire assaying is
dilute nitric acid
39
the cupel is made of what material
sheep bone ash
40
it is the fusion stage wherein the reaction involves the evolution of gases
2nd stage
41
borax melts at what temperature
560 degrees
42
what does salt do in fire assaying
cover and wash
43
in fire assaying the oxidation of Pb and PbO is
exothermic
44
which of the following arr examples of neutral flux
fluorspar and cryolite
45
it is an artificial metallic arsenide o antimonide formed during smelting operation. in fire assaying, it is in the form as an arsenide of iron
speiss
46
this is an active readily fusible acid flux. it is often used as a cover for crucible fusion
borax
47
the readily fusible acid flux. it is depxidizing desulfurizing agent and when reduce, applies the metal necessary for the collection of gold and silver
PbO
48
powerful oxidizing agent. it is in fire assat to oxidize sulphides arsenic, etc. when present in large amount it causes boiling of the crucible charge and necessitates careful heating to prevent loss. what is the oxidizing agent.
niter
49
the lead button is separated crom the slag and then treated by thus process. this consists of oxidizing fusion in porous vessel
cupellation
50
which of the following is an important characteristic of chemical grade chromite
high Cr:Fe ratio
51
in gyratory crusher, what do you call the moving or gyrating component of the crusher
cone head
52
which of the following is a chemical derivative product of chemical grade chromite and is base material in the manufacture kf other value added chrome based industrial product
chromic acid
53
gold is widely used in which of the following industries
electronic or microchips industry
54
in recovering gold from an amalgam, what do you call the process of precipitating the mercury to free the gold the. later condensing the same to recover the mercury for possible re-use
retorting
55
in the conventional belt conveyor arrangement drive motors are often manufactured at high RPM. this is translated to a speed optimum for material belt conveyance by which of the following equipment
gear box
56
in a lab test of effluent samples, ferrous sulfate is precipitated into ferric hydroxide after hydrolysis. the resulting reaction also produces sulfuric acid (H2SO4). once the H2SO4 is made to react with quick lime (CaO), it produces the following product
CaSO4 + H2O
57
in fire assaying, which of the following is an bactive and readily fusible acid flux often used as a cover for fusion in crucibles or furnace vats
borax
58
in fire assaying the bead sometimes contains very little silver to part and therefore it is necessary to alloy it with more silver. what do you cqll this process
inquartation
59
what is the product when the metallurgical chromite is smelted
ferrochrome
60
which of the following refers to the process of reducing rocks and or minerals to certain desired size or sizes where optimum mineral liberation attained
comminution
61
which of the following grinding equipment uses various steel materials and hard rocks of assorted sizes and shapes such as pre cut drill steels or rods, scrap iron, etc as main grinding medium
pebble mill
62
what do you call the process of taking a small portion of a body as a replresentative of a larger volume and is done in a regular and mechanical manner as possible
sampling
63
which of the following gold recovery processes refers to the dissolution of gold in mercury
amalgamation
64
which of the following refers to the process of recovering economic metals loke copper and gold from low grade ores by treating them with chemicals at controlled pH to dissolve the subject metals and later precipitate the sane with other agents
leaching
65
in the principle of flotation, what do you call the reagents that are used to create vigorous effervescence or repellant bubbles in the slurry
frothers
66
in conventional screw classifier, what do you call the overflow product
slimes
67
copper oxides cannot be recovered by flotation without prior subjecting them to which of the following
sulfidization
68
which of the following is the product of smelting iron ores with high charge of silica
ferro silicon
69
which of the following is the product of smelting iron ores with high charge of pyrolusite
ferro manganese
70
which of the following elements is strategic and beneficial in flash smelting process due to its contribution in reducing energy consumption in the furnace. this element produces heat during smelting
sulfur
71
in the recovery of gold through counter current decantation processor CCD, what is the best and most economicak precipitating agent of gold from the pregnant solution using the merril crowe technology
zinc dust
72
in the operation high capacity hydrocyclones in closed circuit with large ball mills, which of the following is the overflow product from the hydrocyclone? this product is pumped to the flotation banks for mineral recovery
fine materials or slimes
73
in dewatering of mineral concentrates, which of the following filter equipment is fitted with a number of rotating circular plate-like filter elements wrapped with filter cloths. these are connected to a common vacuum pump that suctions water as the rotating filter plates are immersed in a thicknened concentrate pulp
disc filter
74
why there is a need to pelletize mineral concentrates beforecharging the same into a blast furnace
prevent fine concentrates from being blown off by strong air flow in the surface
75
the previously uncontrolled mill tailings disposal of diwalwal gold rush area has environmentally damaged the downstream farmlands of compostela valley due to which of the following
all of these
76
in a jaw crusher, what do you call that part is stationary but is in direct contact with the material to be crushed
fixed jaw
77
what do you call the process of separating minerals by taking advantages of their gravitt differentials thru continuous shaking motion whereby the heavier materials are left behindqnd carried down by
tabling
78
in a screw classifier arrangement, what do you call the screw like mechanism that elevates the sand from the slimes thereby affecting separation
flight
79
which of the following equipment is traditionally used in washing manufactured sand from the crushing plangs? it aksi separates the washed sand from waste water containing slimes?
sand classifier