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Metallurgy Mock Test-5

Question No:1

The froth floatation process is used for the concentration of

[A] ore having low density
[B] ore having magnetic nature
[C] ore having high density
[D] ore having water soluble gangue



Question No:2

The flux used in the extraction of iron from haematite in the blast furnace is

[A] Lime stone
[B] Silica
[C] Coke
[D] Quartz



Question No:3

The slag formed in the extraction of iron from haematite in the blast furnace is

[A] FeSiO3
[B] CaSiO2
[C] MgSiO3
[D] Ca3(PO4)2



Question No:4

The blue gas produced during the calcination of magnesite ore is

[A] SO2
[B] O2
[C] CO2
[D] CO



Question No:5

Gelena [PbS] on heating in limited supply of air gives lead metal. This is known as

[A] Smelting
[B] Calcination
[C] Self reduction
[D] Sulphatizing roasting



Question No:6

Amixture of haematite, coke and limestone on heating in blast furnace gives molten iron metal. This is known as

[A] Smelting
[B] Calcination
[C] Roasting
[D] Liquation



Question No:7

Which of the metal can be obtained directly during the roasting of its sulphide ore

[A] Cu
[B] Zn
[C] Fe
[D] Ca



Question No:8

Froth floatation process for the concentration ores is an illustration of the practical application of

[A] Adsorption
[B] Absorption
[C] Coagulation
[D] Sedimentation



Question No:9

The substance used as an activator in froth floatation process is

[A] Potassium ethylxanthate
[B] Sodium cyanide
[C] Copper sulphate
[D] Pine oil



Question No:10

1O. Which of the following is used as a depressant in froth floatation process ?

[A] Amyl xanthate
[B] Pine oil
[C] Copper sulphate
[D] Postassium cyanide



Question No:11

The process in which the ore is heated in excess of air below its melting point is known as

[A] Roasting
[B] Calcination
[C] Reduction
[D] Distillation



Question No:12

Heating pyrites in air to remove sulphur dioxide is known as

[A] Calcination
[B] Fluxing
[C] Smelting
[D] Roasting



Question No:13

In roasting

[A] moisture is removed
[B] no metal impurities are removed
[C] ore becomes porous
[D] all the above



Question No:14

To which of the following ores, calcination process is not applicable

[A] CaCO3
[B] Al2O3H2O
[C] CaCO3Ca(OH)2
[D] ZnS



Question No:15

Calcination and roasting are generally carried out in

[A] Revebratory furnace
[B] Open hearth furnace
[C] Blast furnace
[D] Muffle furnace