Extractive Metallurgy Test

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Extractive Metallurgy Test - 1

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Weekly Quiz Competition

Question 1
1 / -0

The process of producing a hard coating of iron nitride on the surface of steel is called

A
Annealing

B
Quenching

C
Tempering

D
Nitriding
Question 2
1 / -0

The main function of roasting is

A
to remove the volatile impurities

B
oxidation of metal

C
reduction of metal

D
to make slag
Question 3
1 / -0

Calamine is an ore of

A
Hg

B
Zn

C
Cd

D
Ca

Solution

Calamine is an ore of Zn containing ZnCO₃.
Question 4
1 / -0

Froth floatation process for the concentration of ores is a practication of

A
Adsorption

B
Absorption

C
Coagulation

D
Sedimentation

Solution

Gangue particles are wetted by water and adsorbed.
Question 5
1 / -0

The material used in semiconductors

A
Si

B
Sn

C
Ti

D
Cs
Question 6
1 / -0

Plumbo-solvency refers to

A
Oxidation of lead to lead oxide

B
Oxidation of lead to red lead

C
Dissolution of lead in water containing air

D
Making lead wires by forcing heated metal through a die

Solution

Lead dissolves in water containing dissolved air, due to the formation of lead hydroxide. This solvent action of water on lead is called plumbo-solvency.
Question 7
1 / -0

Which of the following is manufactured by siemens martin process?

A
Pig iron

B
Cast iron

C
wrought iron

D
steel
Question 8
1 / -0

The metal oxide, which cannot be reduced to metal by carbon is

A
ZnO

B
Fe₂O₃

C
PbO

D
Al₂O₃

Solution

Al has more affinity for oxygen than carbon.

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Extractive Metallurgy Test - 1

Result

Extractive Metallurgy Test - 1

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Question 1

Annealing

Quenching

Tempering

Nitriding

Question 2

to remove the volatile impurities

oxidation of metal

reduction of metal

to make slag

Question 3

Hg

Zn

Cd

Ca

Solution

Question 4

Adsorption

Absorption

Coagulation

Sedimentation

Solution

Question 5

Si

Sn

Ti

Cs

Question 6

Oxidation of lead to lead oxide

Oxidation of lead to red lead

Dissolution of lead in water containing air

Making lead wires by forcing heated metal through a die

Solution

Question 7

Pig iron

Cast iron

wrought iron

steel

Question 8

ZnO

Fe2O3

PbO

Al2O3

Solution

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Fe₂O₃

Al₂O₃