Quiz 4

Question 1

A pulp which contains of a moisture of fine solids (slimes) and water

Answer 1

Slurry

Question 2

The ratio of the weight of this water to the weight of the solids in the slurry

Answer 2

Dilution Ratio

Question 3

In hydrocyclone, the top of the cylindrical section is closed with a plate through which passes an axially mounted central overflow pipe. The pipe is extended into the body of the cyclone by a short, removable section known as?

Answer 3

Vortex Finder

Question 4

The main use of the hydrocyclone in Mineral Beneficiation is as a ?

Answer 4

Classifier

Question 5

It is the operation of the removable of the last recoverable fraction of valuables before discarding the final tailing from the treatment plant.

Answer 5

Scavenging

Question 6

In the operation of re-treating the rough concentrates to remove its quality, what device is used?

Answer 6

Cleaner

Question 7

If a group of both light and heavy particles all of same size are taken in equal number, the particle are rearranged after several pulsion and suction strokes. The rearrangement of particles in jigging is called?

Answer 7

Stratification

Question 8

It is an inclined stationary through 60 to 90 CM long narrowing from about 24 CM in width at the feed and 2-3 CM at the discharge end need consisting of 50 to 65% solids enter and stratifies as the particles flow through a crowds into the narrow discharge area

Answer 8

Shaking Table

Question 9

What reagent alters the action of the collector, either by intensifying or reducing its water - repellent effect on the mineral surface? Thus, this makes collector action more selective towards certain minerals.

Answer 9

Modifiers

Question 10

A TSF configuration where the natural topography combined with the containment embankments from the primary tailings storage basin.

Answer 10

Cross Valley TSF

Question 11

What is the reciprocal of electrical conductivity?

Answer 11

Resistivity

Question 12

In a high-tension separator, the ionization of air takes place as?

Answer 12

Corona Discharge

Question 13

It is an operation of concentrating a relatively dilute slimy pulp into a thick pulp by allowing solid particles to settle under the influence of gravity force?

Answer 13

Thickening

Question 14

Drying reduces the moisture content to about?

Answer 14

5%

Question 15

In the thickening operation, the final pulp containing about 15-30% solids is thickened to a pulp of?

Answer 15

55-65%

Question 16

In a sorting classifier, where do underflow products are discharged?

Answer 16

Spigot

Question 17

What do you call the rising current of water at the bottom of the sorting column?

Answer 17

Hydraulic Water

Question 18

These are substances added to the ore pulp prior to or during flotation in order to make it possible to float valuable mineral particles and not to float the gangue mineral particles

Answer 18

Reagents

Question 19

What is the Complete Name of the most important among the synthetic frothers

Answer 19

Methyl Isobutyl Carbinol

Question 20

Used to depress quartz in soap flotation

Answer 20

Sodium Silicate

Question 21

What do you call the reagent such as sodium sulphide which imparts the sulphide surface to the mineral particles to facilitate for collector coating?

Answer 21

Sulphidizer

Question 22

When all the valuable minerals are selected and floated, this flotation is called ?

Answer 22

Selective Flotation

Question 23

What is the operation where the pulp is treated with necesarry reagents like depressant and collector, prior to flotation in order to convert the mineral particles to respond readily in a flotation cell, reduces its residence time in the flotation cell and hence the capacity of the cell increases?

Answer 23

Conditioning

Question 24

What is the method of separating mixtures of particles of different sizes, shapes and specific gravities into two or more products on the basis of velocity with which the particles fall through a fluid medium?

Answer 24

Classification

Question 25

Fine particles which are carried toward the vortex is picked up by?

Answer 25

Vortex Finder

Question 26

What is the main force responsible for the separation of particles in hydrocyclone?

Answer 26

Centrifugal Force

Question 27

The reagents having both frothing and collecting properties are known as?

Answer 27

Frother-collectors

Question 28

A method of raising TSF embankments which has the advantage of requiring smaller volumes of sand-fill to raise the crest to any given height. The dam can thus be raised more quickly and there is less trouble keeping it ahead of the tailings pond during the early stages of construction.

Answer 28

Centerline Method

Question 29

This happens when the jig bed collapses. The movement of coarse particles has been interrupted, but fine particles can still move in the interstices of the just collapsing bedof larger particles.

Answer 29

consolidation trickling

Question 30

What is sometimes placed on the jig screen to permit the heavy product to pass through the screen and to prevent the passage of light product into the hutch?

Answer 30

Ragging

Question 31

The crowding and dilating effect of the bed is produced by reduction of perimeter as the material approaches the center ischarge point. This employs an inverted coin instead of a rectangular channel.

Answer 31

Reichert Cone

Question 32

A stationary flowing film concentrator consists of a descending spiral launder of a helical conduit with a modified semi circular cross section.

Answer 32

Spiral Concentrator

Question 33

This refers to the vertical distance between the crest of the tailings dam or embankment and the normal water level within the impoundment area. It is a space left as safety margin to prevent water from overtopping the dam during extreme events, such as heavy rainfall or other inflow events.

Answer 33

Freeboard

Question 34

Adherence of the mineral particles to the air bubble depends on?

Answer 34

Contact Angle

Question 35

Minerals with high contact angles are called?

Answer 35

Hydrophobic Minerals

Question 36

[True or False] In tabling the low density particles settle into the troughs between the rifles and the motion of the table throws them towards the right side of the table and finally discharged them at the corner diagonally opposite to the feeder corner

Answer 36

True

Question 37

[True or False] absorption refers to the process in which their agents used in the flotation process adhere to the surface of the mineral particles and form a thin film which alters the surface properties of the mineral particles and makes them hydrophobic or hydrophilic

Answer 37

False

Question 38

[True or False] differential flotation is used when an unwanted mineral is selected and floated in which case sink is the required product

Answer 38

False

Question 39

[True or False] the particles having settling velocity less than that of the water velocity settled to the bottom of the first sorting column and got discharged through the spigot

Answer 39

False

Question 40

[true or false] at the wall of the hydro cyclone is a zone of low pressure and low centrifugal force which surrounds at air filled vortex

Answer 40

False