Please Answer ALL. Thanks. 1) Generally, what piece of equipment would produce t

Question

Please Answer ALL.

Thanks.

1) Generally, what piece of equipment would produce the smallest grain size?

Select one:

a. cone crusher

b. jaw crusher

c. gyratory crusher

d. ball mill

2) A rock breakage tester is used to determine what aspect of ROM ore?

Select one:

a. assay grade

b. P80 size

c. chemical composition

d. hardness

3) Generally, a mineral processing flowsheet would proceed in which of the following sequences?

EndFragment

Select one:

a. Liberation, concentration, extraction, refining

b. Liberation, extraction, concentration, refining

c. Extraction, concentration, liberation, refining

d. Concentration, liberation, refining, extraction

4) Why is a roasting step sometimes included in processing sulfide and oxide ores?

EndFragment

Select one:

a. to drive water from the feed

b. to blend calcium into the feed

c. to oxidise any iron present

d. to remove sulfur or oxygen from the feed

5) Smelting is generally a process in which the charge is melted and separated into what two immiscible liquid layers?

Select one:

a. liquid slag and liquid matte

b. an oxide and a sulfide

c. heavy metals and light metals

d. metal and gangue

6) Over-sized material is passed back through the crusher for further sizing. This describes what?

Select one:

a. a rougher circuit

b. open circuit grinding

c. a scavenger circuit

d. closed circuit grinding

7) Mills are operated below the ‘critical speed’ to prevent what?

Select one:

a. wear and tear on the liner

b. excessive use of energy

c. centrifuging

d. grinding

Explanation / Answer

1)Generally, what piece of equipment would produce the smallest grain size

d. ball mill

2) A rock breakage tester is used to determine what aspect of ROM ore

d. hardness

3)Generally, a mineral processing flowsheet would proceed in which of the following sequences

a. Liberation, concentration, extraction, refining

4) Why is a roasting step sometimes included in processing sulfide and oxide ores

EndFragment

d. to remove sulfur or oxygen from the feed

5) Smelting is generally a process in which the charge is melted and separated into what two immiscible liquid layers

a. liquid slag and liquid matte

6) Over-sized material is passed back through the crusher for further sizing. This describes what

d. closed circuit grinding

7) Mills are operated below the ‘critical speed’ to prevent what

a. wear and tear on the liner

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