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Metallurgy > Quiz 5 > Flashcards

Quiz 5 Flashcards

1
Q
  1. A type of carbon cyanidation:
    a. Carbon in pulp
    b. Carbon in leach
    C. Carbon in solution
    d. All of the above
A

d

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2
Q
  1. A concentration method based on the specific gravity of the
    minerals:
    a. surface concentration
    b. specific concentration
    C. gravity concentration
    d. flotation
A

C

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3
Q
  1. A type of jaw crusher where the moving plate is pivoted at the
    top:
    a. Blake Crusher
    b. Dodge Crusher
    C. Roller Crusher
    d. Gyratory Crusher
A

a

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4
Q
  1. Reagents used to improve selective separation of minerals by
    lowering the floatability of specific minerals.
    a. Depressants
    b. Collectors
    C. Frothers
    d. Activators
A

a

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5
Q
  1. Semi-Autogenous mills operate at:
    a. Low ball loading
    b. Same ball load as conventional mills
    C. No ball loading
    d. Low rod loading
A

a

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6
Q
  1. The ease with which the materials can be comminuted.
    a. ore hardness
    b. ore grindability
    C. crushing index
    d. work index
A

b

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7
Q
  1. A type of flotation reagent that increases the stability of the
    bubbles:
    a. Collectors
    b. Frothers
    C. Depressants
    d. Activators
A

b

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8
Q
  1. The size of the discharge opening in the crusher is called:
    a. Set
    b. Gape
    C. Length
    d. None of the above
A

a

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9
Q
  1. Kicks’s Law states that the energy consumed in size reduction
    is directly proportional to:
    a. increase in particle diameter
    b. decrease in particle diameter
    C. increase in particle surface area
    d. decrease in particle surface area
A

b

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10
Q
  1. To separate magnetite impurities from silica, what type of
    magnet should be used:
    a. Low intensity magnet
    b. High intensity magnet
    C. Drum magnet with low intensity
    d. Low intensity wet magnetic separator
A

b

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11
Q
  1. The compression of the ore against rigid surfaces or by impact
    against surfaces in rigidly constrained motion path.
    a. Grinding
    b. Pulverizing
    c. Crushing
    d. Ball milling
A

c

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12
Q
  1. Autogenous mills operate at:
    a. At no power consumption
    b. Same ball load as conventional mills
    C. No ball loading
    d. Low rod loading
A

C

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13
Q
  1. Hydrometallurgical processes where solutions such as acids,
    bases or aqueous salts are used to dissolve the desired metal or
    mineral for eventual recovery.
    a. Solvent Extraction
    b. Leaching
    C. Precipitation
    d. Adsorption
A

b

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14
Q
  1. In the Merille Crowe Process, the gold in the clarified solution
    is precipitated using:
    a. Carbon
    b. Zinc Dust
    C. Scrap Iron
    d. Lead Dust
A

b

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15
Q
  1. The fluxing agent which is the main source of lead in the fire
    assaying is:
    a. Silica
    b. Niter
    C. Flour
    d. Litharge
A

d

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16
Q
  1. Which of the following processes are not part of the carbon
    cyanidation?
    a. Leaching
    b. Adsorption
    C. Elution
    d. None of the above
A

d

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17
Q
  1. In fire assaying, the product of fusion that is used to collect the
    gold and the silver in the ore is:
    a. Dore
    b. Slag
    C. Lead Button
    d. Litharge
A

C

18
Q
  1. A mineral processing where the ore is reduced to the desirable
    size prior to concentration:
    a. Comminution
    b. Sizing
    C. Dewatering
    d. Classification
A

a

19
Q
  1. A step in the fire assaying where the dore’ is treated with nitric
    acid to dissolve the silver.
    a. Annealing
    b. Parting
    C. Cupellation
    d. None of the above
A

b

20
Q
  1. The ratio of the feed to the concentrate is:
    a. Reduction Ratio
    b. Diliution Ratio
    C. Recovery
    d. Concentration Ratio
A

d

21
Q
  1. The product of mineral processing which contains majority of
    the valuable minerals: a. Middlings
    b. Concentrate
    C. Tailings
    d. None of the above
A

b

22
Q
  1. A gravity concentration process where a heavy media is used
    whose specific gravity is between the specific gravities of the
    minerals to be separated;
    a. Panning
    b. Amalgamation
    C. Sink and Float
    d. Jigging
A

C

23
Q
  1. It is used to precipitate copper from copper sulfate
    a. tin can
    b. scrap iron
    C. zinc dust
    d. activated carbon
A

b

24
Q
  1. The process of gathering particles into a mass or cluster.
    a. Briquetting
    b. Pelletizing
    C. Sintering
    d. All of the above
A

d

25
Q
  1. The ideal fuel used in iron smelting using blast furnaces.
    a. Diesel Fuel
    b. Coke
    C. Charcoal
    d. Natural gas
A

b

26
Q
  1. The metallic product of the blast furnace is:
    a. Cast Iron
    b. Wrought Iron
    C. Pig Iron
    d. Steel
A

C

27
Q
  1. In copper smelting, excessive magnetite leads to:
    a. good grade of matte
    b. viscous slag
    C. formation of blisters
    d. oxidation of Cu2S
A

b

28
Q
  1. A high-temperature process forming a liquid sulfide phase
    which contains most of the copper of the charge and a liquid slag
    phase with a minimum copper.
    a. Matte smelting
    b. Reduction smelting
    C. Fire Refining
    d. Converting
A

a

29
Q
  1. A metallurgical operation or combination of operations that
    produces liquid metal and liquid slag.
    a. Calcining
    b. Smelting
    C. Roasting
    d. Drying
A

b

30
Q
  1. The process of heating sulfide minerals in the presence of
    excess air to give metal oxides and sulfur dioxide.
    a. Smelting
    b. Roasting
    C. Sintering
    d. Calcining
A

b

31
Q
  1. A process of agglomeration which consists of rolling the fine
    powders in a drum or disc with water and sometimes with an
    inorganic binder.
    a. Briquetting b. Pelletizing
    C. Sintering
    d. Nodulizing
A

b

32
Q
  1. A high-temperature process forming a liquid sulfide phase
    which contains most of the copper of the charge and a liquid slag
    phase with a minimum copper.
    a. Matte smelting
    b. Reduction smelting
    C. Fire Refining
    d. Converting
A

a

33
Q
  1. In solvent extraction, the aqueous solution and the organic
    solvent should be:
    a. Totally miscible
    b. Partially miscible
    C. Totally immiscible
    d. Partially immiscible
A

C

34
Q
  1. The process which involves the transfer of the extracted metal
    ion from the aqueous phase to the organic phase (extracting
    agent)
    a. solvent extraction
    b. precipitation
    C. carbon adsorption
    d. zinc cementation
A

a

35
Q
  1. Aside from supplying heat, metallurgical fuels act as:
    a. Reducing agent
    b. Oxidizing agent
    C. Source of light
    d. Basic flux
A

a

36
Q
  1. The silicate degree is the ratio of in the
    acid to the base components of the slag.
    a. Silica
    b. Oxygen
    C. Lead
    d. Iron
A

b

37
Q
  1. Which of the following mineral processing methods takes
    advantage of the difference in specific gravity:
    a. Panning
    b. Tabling
    C. Heavy Media Separation
    d. All of the above
A

d

38
Q
  1. Surface characteristics of mineral particles properly coated
    with flotation collector tends to become:
    a. the same as uncoated
    b. Hydrophillic
    C. Aerophobic
    d. Hydrophobic
A

d

39
Q
  1. A concentration method for coarse-sized ores where the
    high-grade ores or pieces are manually separated in a slowly
    moving conveyor belt or table.
    a. Hand Picking/Sorting
    b. Paning
    C. Tabling
    d. Heavy Media Separation
A

a

40
Q
  1. A type of flotation reagent that is used to assist or improve the
    selective separation of minerals that do not respond to a simple
    collector-froth combination.
    a. Collectors
    b. Frothers c. Depressants d. Activators
A

d

Metallurgy (8 decks)

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