Metallurgy and Met Applied Math Flashcards
1
Q
- The principal mineral of Manganese
a. Cinnabar
b. Argentite
c. Pyrolusite
d. Ilmenite
e. Magnesite
A
C
2
Q
- In fire assaying, the bead sometimes contains very little silver part and therefore it is necessary to alloy it with more silver. What do you call this process?
a. Cupellation
b. Inquartation
c. Dissolution
d. Salting
e. Fusion
A
B
3
Q
- It includes extraction processes of metal values from the ore or concentrate which are undertaken at high temperatures
a. Ore dressing
b. Pyrometallurgy
c. Smelting
d. Converting
A
B
4
Q
- Which of the following by products of PASAR is being sold to Philpos for the manufacture of fertilizer?
a. Slag
b. Copper concentrate
c. Pyrite concentrate
d. Sulfuric acid
e. Smelter steam
A
D
5
Q
- In a Merryl Crowe Process of precipitating gold from pregnant solution, which of the following is the best precipitation agent?
a. Iron dust
b. Zinc dust
c. Silver dust
d. Gold dust
e. Copper dust
A
B
6
Q
- In grinding very hard andesite and diorite rocks containing copper minerals, which of the following is the most popular and economical grinding medium for optimum mineral liberation?
a. Steel rods
b. Basalt rocks
c. Steel balls
d. Grinding media
e. None of these
A
C
7
Q
- The main purpose of regrind ball mill
a. To prevent overgrinding
b. Increase the grade of final concentrate by detaching gangue minerals
c. To ease the recovery process
d. To ensure safety
e. None of these
A
B
8
Q
- Which of the following type of chromite mineral is used to manufacture paint pigments colored green and yellow?
a. Refractory grade
b. Metallurgical grade
c. Chemical grade
d. All of these
e. None of these
A
C
9
Q
- It states that the work input in crushing or grinding is proportional to the reduction in diameter of the particles
a. Bond’s law
b. Rettinger’s law
c. Kick’s law
d. Fick’s law
e. None of these
A
C
10
Q
- The frother added to flotation pump _____ the mineralized bubbles rising to the surface of the pulp
a. Stabilizes
b. Expands
c. Contracts
d. Activates
e. Destabilizes
A
A
11
Q
- Sulfide flotation is normally undertaken at this pH
a. Acidic
b. Basic
c. Neutral
d. Strongly acidic
e. Acidic to basic
A
B
12
Q
- Flotation process where all valuable minerals are floated from gangue to subsequent separation of each of the valuable minerals
a. Bulk flotation
b. Skin flotation
c. Heap leaching
d. Differential flotation
A
A
13
Q
- Flotation reagent which prevents the collectors from coating on the mineral surface
a. Activators
b. Depressing
c. Modifiers
d. Classifiers
e. None of these
A
E
14
Q
- Flotation reagent which enhances the collector coating on the mineral surface
a. Activators
b. Depressing
c. Modifiers
d. Classifiers
e. None of these
A
A
14
Q
- In the operation of high capacity hydrocyclones, the overflow product consists of which material classification?
a. Coarse materials
b. Fine materials
c. Concentrate
d. Wash materials
e. Middlings
A
B
15
Q
- In fire assaying, what is the main composition of a dore?
a. Au and Ag
b. Cu and Ag
c. Fe and Ag
d. Au and Cu
e. None of these
A
A
16
Q
- The process of precipitating the mercury to free the gold then later condensing the same to recover the mercury for possible reuse
a. Precipitating
b. Retorting
c. Amalgamation
d. Cyanidation
e. Evaporation
A
B
16
Q
- Which of the following mineral Is metallic?
a. Gypsum
b. Feldspar
c. Barite
d. Attapulgite
e. Hematite
A
E
17
Q
- In assaying, if the weight of gold bead recovered is 2 grams, what is the grade assay of the ore if the sample is 1 assay ton?
a. 1 gmt
b. 2 gmt
c. 2.5 gmt
d. 3 gmt
e. 1.5 gmt
A
B
17
Q
- Cyanide contained in the mill tailings is lost during impoundment due to which of the following processes?
a. Absorption in the facility
b. Precipitation
c. Evaporation when exposed to sunlight
d. None of these
A
C
17
Q
- Commonly desired weight of lead button
a. 28 g
b. 29 g
c. 32 g
d. 27 g
e. None of these
A
A
17
Q
- The mineral recovery process is most applicable to sulfide ores particularly chalcopyrite
a. Classification
b. Smelting
c. Flotation
d. Cyanidation
e. Leaching
A
C
18
Q
- Based on a short ton, 1 assay ton is equivalent to ____ grams
a. 29.166
b. 32.66
c. 22.616
d. 28.166
e. None of these
A
A
19
Q
- The type of jaw crusher where the upper end of the movable crushing surface is the fulcrum end while the lower end swings to and from the stationary surface?
a. Blake type
b. Dodge type
c. Single toggle type
d. Double toggle type
e. None of these
A
A
20
Q
- Heat treatment process where the metal or allow is cooled very fast after being heated
a. Hardening
b. Annealing
c. Smelting
d. Fusion
e. None of these
A
A
21
Q
- This heat treatment cools the metal or allow in still air after being heated at some predetermined conditions
a. Hardening
b. Annealing
c. Smelting
d. Fusion
e. None of these (Normalizing)
A
E
22
Q
- It is an economic justification of ore dressing
a. Savings in mining cost
b. Savings in freight
c. Savings in milling cost
d. Savings in manpower
e. All of these
A
B
23
Q
- The distance range of discontinuity spacing which is considered as extremely close spacing
a. 20-60 mm
b. 60-100 mm
c. 50-200 mm
d. 60-200 mm
e. None of these
A
D
24
Q
- It is the product of an iron blast furnace
a. Pig iron
b. Wrought iron
c. Cast iron
d. Malleable iron
e. None of these
A
A
24
Q
- It is the size to which an ore must be reduced so that almost all of the valuable mineral is freed from attachment with the gangue materials
a. Screen size
b. Separation size
c. Grind size
d. Liberation size
e. None of these
A
D
25
Q
- The process wherein air is blown through molten pig iron or matte where by sulfur and other impurities are removed from the melt
a. Smelting
b. Converting
c. Blowing
d. Roasting
e. Annealing
A
D
25
Q
- The way to describe qualitatively in which stress and stain are related in a material under load
a. Elasticity
b. Plasticity
c. Poisson’s ratio
d. Stress
e. Constitutive behavior
A
E
26
Q
- Brass is an alloy of copper and ___
a. Zinc
b. Iron
c. Tin
d. Lead
e. None of these
A
A
27
Q
- Bronze is an alloy of copper and ___
a. Zinc
b. Iron
c. Tin
d. Lead
e. None of these
A
C
28
Q
- The property of metals which non-metals do not have
a. Porosity
b. Hardness
c. Malleability
d. Durability
e. None of these
A
CC
29
Q
- The metal containing minute amount of other elements
a. Brass
b. Bronze
c. Black metal
d. Solid solution
e. None of these (alloy)
A
E
30
Q
- In CIP, the material that effectively remove the cyanides of precious metals from the leach solution
a. Coal
b. Charcoal
c. Activated carbon
d. Coke
e. None of these
A
C
30
Q
- Hydrometallurgical processes where solutions such as acids, bases, or aqueous salts are used to dissolve the desired metal or mineral for eventual recovery
a. Leaching
b. Electrowinning
c. Precipitation
d. Solvent extraction
e. None of these
A
A
30
Q
- In CIP, activated carbon is in contact with the cyanide solution ____ the leaching process
a. Before
b. After
c. During
d. Intermediate
e. None of these
A
B
30
Q
- In CIL, activated carbon is in contact with the cyanide solution _____ the leaching process
a. Before
b. After
c. During
d. Intermediate
e. None of these
A
C
30
Q
- It is a pig iron converting process
a. Bessemer process
b. Merryl Crowe process
c. Furan process
d. Durville process
A
A
31
Q
- It is a major gaseous product of sulfide roasting
a. CO
b. SiO2
c. CO2
d. SO2
e. None of these
A
D
32
Q
- It is a product of sintering process
a. Tungsten carbide cutting tips
b. Aluminum rivets
c. Bronze rivets
d. Tool steel cutting tips
e. None of these
A
A
33
Q
- Screening equipment that has two separate products
a. Sing deck screen
b. Double deck screen
c. Triple deck screen
d. Apron feeder
e. None of these
A
A
34
Q
- Precious metal values can be recovered from loaded carbon by
a. Smelting
b. Converting
c. Roasting
d. Precipitation
e. None of these
A
A
34
Q
- The minerals commonly used as drilling mud in diamond drilling
a. Bentonite
b. Clay
c. Attapulgite
d. Barite
e. Andesite
A
D
34
Q
- Refers to the reagents that accelerate fine to coarse particles to form bigger particles making them easier for thickening and filtration
a. Frothers
b. Reactants
c. Flocculants
d. Depressants
e. Activators
A
C
35
Q
- In grinding, what do you call the ball mill rotation at which maximum grinding efficiency is attained
a. Centrifuging
b. Cataracting
c. Maximum speed
d. Critical speed
e. None of these
A
D
35
Q
- These are those most widely used collection in mineral flotation and may be classified in two types according to the structure of the polar group
a. Anionic collectors
b. Oxyhydryl
c. Sulphydryl
d. Cationic
A
A
36
Q
- The following are factors which affect screen performance except
a. Particple shape
b. Nature of feed material
c. Feed rate
d. Vibration rate
e. Number of screen aperture
A
E
37
Q
- It is a small amount which contains all the components in the proportions in which they occur in the original lot
a. Assay
b. Sample
c. Representative
d. Feed split
e. None of these
A
B
38
Q
- It is the theory on comminution which states that the energy consumed is size reduction is proportional to the area of new surface produced
a. Kick’s theory
b. Bond’s theory
c. Bruces berry theory
d. Rittinger’s theory
A
D
38
Q
- A hand sampling technique wherein broken rocks are picked at random at some convenient locations to form sample
a. Channel
b. Grab
c. Cut
d. Chip
e. Core
A
B
39
Q
- In hand sampling procedures, this technique provides the smallest possible errors in sampling
a. Grab sampling
b. Cut sampling
c. Channel sampling
d. Chip sampling
A
C
40
Q
- What is the most common associated element for porphyry copper (island arc type)?
a. Au
b. Fe
c. Mo
d. Ni
e. Ag
A
A
41
Q
- Fire assaying is considered as
a. Volumetric
b. Gasometric
c. Gravimetric
d. Wet method
e. None of these
A
C
42
Q
- It is used to separate Au and Ag
a. Sodium cyanide
b. Nitric acid
c. Silica
d. Ferrosilicon
e. All of these
A
B
43
Q
- Used in commercial recovery of Au and Ag from their ore
a. Sodium chloride
b. Sodium cyanide
c. Aqua regia
d. HCl
A
B
44
Q
- A jaw crusher is a ________ crusher
a. Primary
b. Secondary
c. Tertiary
d. Fourth stage
e. Combination
A
A
45
Q
- The most common method of concentrating chromite ores
a. Classifying
b. Elutriation
c. Jigging
d. Sluicing
A
C
46
Q
- The process of separating the ore minerals from the gangue minerals
a. Ore dressing
b. Extractive metallurgy
c. Milling
d. Leaching
A
A
47
Q
- The assay of gold bullion is expressed as
a. Ppm
b. Gm/MT
c. Fineness
d. Percent
e. None of these
A
C
48
Q
- The artificial sulfide formed in the dry way in assaying is
a. Speiss
b. Matte
c. Slag
d. Button
e. Dore
A
B
49
Q
- An alloy sufficient in precious metals bearing in economic significance is
a. Bullion
b. Dore
c. Amalgam
d. Button
e. None of these
A
A
50
Q
- The chiddy method is applicable in analyzing
a. Cyanide
b. Protective alkalinity
c. Au in cyanide solution
d. Cyanicides
A
C
51
Q
- Slag factor is
a. Ratio of the weight of the mineral to SiO2
b. Quantified weight of slag to be produced
c. Ratio of the oxygen in the acid component
d. Borax to silicon ratio in the charge
e. All of these
A
C
51
Q
- The purpose of close circuit grinding is
a. Lengthen the residence of ore inside the mill
b. Prevent over-grinding
c. Reduce oversize in the product
d. Reduce energy consumption
e. All of these
A
B
52
Q
- The part of the crusher that determines the maximum size that will enter the crusher
a. Throat
b. Mouth
c. Gape
d. Angle of nip
e. Length
A
C
53
Q
- In Tyler standard series, the openings are regulated such that the ratio in any screen to the next screen is
a. 1.414
b. 1.750
c. 2.000
d. 2.150
e. None of these
A
A
54
Q
- The mesh number of a screen is
a. No. of opening per linear inch
b. Opening in cm
c. Opening in inch
d. Opening in mm
e. None of these
A
A
54
Q
- Hindered settling refers to
a. Settling of minerals in the thick pulp
b. Settling of minerals in water
c. Settling of minerals in dilute pulp
d. Settling after agitation
e. None of these
A
A
55
Q
- It contains 40-50 kg/cu. m. of H2SO4, brightening, and smoothing agents
a. Blister Cu
b. Anode impurities
c. Matte
d. Electrolyte
e. None of these
A
D
56
Q
- Avogadro’s number is the number of atoms in one gram atom which is
a. 3.4 x 10^14
b. 6.02 x 10^23
c. 5.9 x 10^32
d. 22.4 x 10^2
e. None of these
A
B
57
Q
- One pound of mole of gas at standard condition occupies
a. 22.4 cu. ft.
b. 359 cu. ft.
c. 22.4 litters
d. 22.4 cu. m.
e. None of these
A
B
58
Q
- The method of assaying carried out in a shallow clay dish by oxidizing fusion is called
a. Wet analysis
b. Scorification
c. Qualitative analysis
d. Solid solvent extraction
A
B
