Metals MCQs | Metallurgy

Solved MCQs on Metallurgy and Metals with answers. 

 

Which  is/are physical methods for ore concentration?

  1. Gravity seperation
  2. Magnetic separation
  3. Froth floatation method
  4. All of these

All of these

 

Which of the following ores is/are separated by froth floatation method?

  1. Galena (PbS)
  2. Copper pyrite (CuFeS2)
  3. Zinc blende (ZnS)
  4. All of these

All of these

 

 

Which ore is/are used for Pb extraction?

  1. Galena
  2. Zinc blende
  3. Cinnabar
  4. Calamine

Galena

 

Which of the following is the process of removing matrix/gangue by fusing with flux?

  1. Roasting
  2. Sintering
  3. Calcination
  4. Smelting

Smelting

 

Which of the following metal is obtained by carbon reduction process?

  1. Al
  2. Cu
  3. Zn
  4. Mg

Cu

 

Which of the following oil is/are used in froth floatation method?

  1. Canola oil
  2. Pine oil
  3. Coconut oil
  4. Brassica oil

Pine oil

 

Which of the following is/are chemical methods for ore concentration?

  1. Calcination
  2. Smelting & leaching
  3. Roasting
  4. All of these

All of these

 

Which ore is/are used for Zn extraction?

  1. Zincite
  2. Zinc blende
  3. Calamine
  4. All of these

Zinc blende

 

Which ore is/are used for Hg extraction?

  1. Cinnabar
  2. Zinc blende
  3. Calamine
  4. All of these

Cinnabar

 

Which is the second anciently known metal?

  1. Copper
  2. Nickel
  3. Silver
  4. Gold

Copper

 

 

 

Gun metal alloy consists of copper and ___.

  1. Zn
  2. Al.
  3. Sn
  4. Ni

Sn

 

Which is the third most abundant element in the nature?

  1. Oxygen
  2. Aluminum
  3. Sulphur
  4. Hydrogen

Aluminum

 

Aluminum occurs in nature as which of the following?

  1. Native
  2. Free
  3. Both native & combined
  4. Combined

Combined

 

Which of the following is not an ore of aluminium?

  1. Bauxite
  2. Cryolite
  3. Monazite
  4. Mica

Monazite

 

Aluminium is typically extracted from which of the following?

  1. Feldspar
  2. Alumite
  3. Bauxite
  4. Cryolite

Bauxite

 

Which impurities are present with the bauxite?

  1. Silica
  2. Alumina
  3. Both silica and ferric oxide
  4. Ferric oxide

Both silica and ferric oxide

 

Which steps is/are involved in the metallurgy of aluminium?

  1. Electrolytic reduction of alumina
  2. Refining of aluminum
  3. Purification of bauxite
  4. All of these

All of these

 

Which of the following process is not involved in the purification of bauxite?

  1. Bayer’s process

B Goldsmith’s process

  1. Serpek’s process
  2. Hall’s process

Goldsmith’s process

 

In Serpekr’s process the ore is treated with ________.

  1. Coke
  2. Nitrogen gas
  3. None of these
  4. Both A & B

Both A & B

 

What is the formula of Cryolite?

  1. NaзAIF4
  2. Na3AIF6
  3. Na3AIF3
  4. Na3AIF5

Na3AIF6

 

Which property is not correlated to aluminum?

  1. It is a silvery white metal with brilliant lusture
  2. It is malleable and ductile
  3. It is the least reactive element of III group
  4. It is a very light metal with specific gravity as 2.7

It is the least reactive element of III group

 

Which is not alloy of aluminium?

  1. Stellite
  2. Magnelium
  3. Aluminium bronze
  4. Duralumin

Stellite

 

Which element is a refractory substance?

  1. Cr
  2. Fe
  3. Al
  4. Ni

Al

 

Which of the following process is used to get pure Al (99.99%)?

A: Hall’s process

  1. Serpek’s process
  2. Hopp’s process
  3. Bayer’s process

Hopp’s process

 

Which of the following is the second most abundant element occurring in the earth crust?

  1. Ni
  2. Iron
  3. Cr
  4. Cu

Iron

 

Which is not an ore of iron?

  1. Magnetite
  2. Monazite
  3. Haematite
  4. Siderite

Monazite

 

What is the total number of varieties of commercial iron that are still known?

  1. 4
  2. 2
  3. 1
  4. 3

4

 

Which of the following is the purest form of iron?

  1. Steel
  2. Wrought iron
  3. Pig iron
  4. Cast iron

Wrought iron

 

________ is the Iron having up to 1% carbon.

  1. Pig iron
  2. Cast iron
  3. Steel
  4. Wrought iron

Steel

 

Which statement is not correct regarding Open Hearth process?

  1. Steel obtained is of high quality
  2. The process is economical and simple
  3. Scrap iron cannot be used in this process
  4. No iron is lost

Scrap iron cannot be used in this process

 

Which steel is hard and corrosion resistant?

  1. Stainless steel (Cr-steel)
  2. Mn-steel
  3. Si-steel
  4. Ni-steal

Stainless steel (Cr-steel)

 

Stainless steel consists of elements  like  ________.

  1. Fe & Ni
  2. Cr only
  3. Fe, Ni & Cr
  4. Fe only

Fe, Ni & Cr

 

Which of the following is the process in which iron changes over to a compound in environment?

  1. Corrosion
  2. Rusting
  3. Galvanization
  4. Annealing

Rusting

 

Which factors speed up rusting process?

  1. Presence of rust
  2. Contact with less active metal
  3. Presence of acidic environment
  4. All of these

All of these

 

Which stepprevent rusting process?

A, Painting

  1. Coating of Fe3O over iron surface
  2. Electroplating of iron with Cr/Ni
  3. All of these

All of these

 

Which of the following are the Solid compounds of metals which are found in nature?

  1. Minerals
  2. Ores
  3. Slag
  4. Gangue

Minerals

 

Which is the minerals from which a metal is extracted?

  1. Slag
  2. Gangue
  3. Minerals
  4. Ores

Ores

 

Which is/are the impurities which are present in ores?

  1. Gangue
  2. Slag
  3. Minerals
  4. Flux

Gangue

 

Which of the following is a  chemical substance which is used to remove gangue from ore

  1. Slag
  2. Matrix
  3. Flux
  4. Gangue

Flux

 

Which is/are the ores of Mg?

  1. Karnalite
  2. Magnesite
  3. Dolomite
  4. All of these

All of these

 

 

Which of the following is the compound formed by combination of impurities in the ores and foreign substance added?

  1. Gangue
  2. Slag
  3. Matrix
  4. Flux

Slag

 

Which materials is a slag?

  1. BaO
  2. Cao
  3. SiO2
  4. CaSiO2

CaSiO2

 

Chromium is found in nature in the form of

  1. Sulphides
  2. Silicates
  3. Oxides
  4. Borates

Oxides

 

Ferrochrome contains Cr up to

  1. 80-90%
  2. 70-80%
  3. 40-50%

D 60-70%

60-70%

 

Which of the following is not a property of Cr?

  1. Its surface is tarnished easily
  2. It can take very high polish
  3. It is a brilliant silvery metal
  4. It is malleable

Its surface is tarnished easily

 

When red hot steel is rapidly cooled in water, then the process is  known as ____.

  1. Tampering
  2. Roasting
  3. Annealing
  4. Quenching

Quenching

 

In nature nickel is found in which form?

  1. Arsenides
  2. Sulphides
  3. Silicates
  4. All

Arsenides

 

Which is not an ore of nickel?

  1. Nicollite
  2. Siderite
  3. Pentlandite
  4. Garnierite

Siderite

 

_________ % of nickel is existing in the major ore Pentlandite?

  1. 10%
  2. 22%
  3. 14%
  4. 18%

22%

 

In smelting process the ore is mixed with which one?

  1. Silica
  2. Limestone
  3. Coke
  4. All

All

 

Monel metal is an alloy of Ni which contains Ni up to

  1. 80%
  2. 50%
  3. 70%
  4. 60%

60%

 

Which of the following process is used for the conversion of matte into nickel?

  1. Electrolytic process
  2. Monds process
  3. Orford process
  4. All

All

 

Which of the following metals form volatile carbonyl with CO below 80°C?

  1. Ni
  2. Co
  3. Fe
  4. Cu

Ni

 

Which is not a property of Ni?

  1. It is malleable and ductile
  2. It is highly magnetic
  3. It has high electrical and thermal conductivities
  4. It is a soft silvery white metal

It is highly magnetic

 

Which of the following is the process in which ore is heated, generally in the absence of air, to expel water from a hydrated oxide at temperature below their melting points?

  1. Bessemerization
  2. Roasting
  3. Calcination
  4. Froth-floatation

Calcination

 

Which of the following is the process in which ore is heated generally in the presence of air, at temperature below their melting points?

  1. Calcination
  2. Froth-floatation
  3. Roasting
  4. Bessemerization

Roasting

 

Which is not a appropriate and proper use of Ni?

  1. It is used as catalyst
  2. It is attacked by alkalis
  3. It is used in alloy formation
  4. It is used in the preparation of Monel metal

It is attacked by alkalis

 

Which of the following is the process of heating to redness and then slow cooling?

  1. Hardening
  2. Annealing
  3. Tempering
  4. Quenching

Annealing

 

 

Which of the following is the process of extracting a metal in pure form from its ores?

  1. Crushing
  2. Grinding
  3. Dressing
  4. Metallurgy

Metallurgy

 

The matrix is usually in the form of  _____.

  1. Sand
  2. Rocks
  3. Limestone
  4. All of these

All of these

Copper occurs in nature as __.

  1. Both native and combined
  2. Combined
  3. Native
  4. None of these

Both native and combined

 

What are the principle ores of copper?

  1. Copper sulphides
  2. Copper oxides
  3. Copper carbonate
  4. Both sulphides and oxides

Both sulphides and oxides

 

What is the formula of copper pyrite?

  1. CuFeS
  2. CuFe2S
  3. CuFeS
  4. CuFeS2

CuFeS2

 

Copper is primarily extracted from which of the following ore?

  1. Oxides ores
  2. Carbonate ores
  3. Sulphide ores
  4. Non-sulphide oress

Sulphide ores

 

Which steps are involved in the extraction of copper?

  1. Roasting
  2. Bessemerization
  3. Smelting
  4. All of these

All of these

Copper deficiency in human results in which disease?

  1. Parkinson’s disease
  2. Alzhimer’s disease
  3. Diabetes
  4. None of these

Parkinson’s disease

 

Which statement is not with respect to copper?

  1. Molten copper absorbs carbon dioxide
  2. It is a best conductor of heat and electricity.
  3. It forms alloys easily
  4. It is malleable and ductile

Molten copper absorbs carbon dioxide

 

Which statement is true regarding copper?

  1. It is used in electroplating
  2. Its salts are used as coloring materials
  3. Its salts are used as insecticides
  4. All are correct

All are correct

 

Which is an alloy of copper?

  1. Bronze
  2. Brass
  3. Monel Metal
  4. All

All

 

In  German silver copper is alloyed with which metal

  1. Zn
  2. Zn & Ni
  3. Al
  4. Ni

Zn & Ni

 

In Monel metal copper is alloyed with which metal?

  1. Mn
  2. Ni
  3. Fe
  4. All

All

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