Metals MCQs | Metallurgy – T4Tutorials.com

Which is/are physical methods for ore concentration?
- Gravity separation
- Magnetic separation
- Froth floatation method
- All of these
Answer: All of these
Which of the following ores is/are separated by froth floatation method?
- Galena (PbS)
- Copper pyrite (CuFeS2)
- Zinc blende (ZnS)
- All of these
Answer: All of these
Which ore is/are used for Pb extraction?
- Galena
- Zinc blende
- Cinnabar
- Calamine
Answer: Galena
Which of the following is the process of removing matrix/gangue by fusing with flux?
- Roasting
- Sintering
- Calcination
- Smelting
Answer: Smelting
Which of the following metal is obtained by carbon reduction process?
- Al
- Cu
- Zn
- Mg
Answer: Cu
Which of the following oil is/are used in froth floatation method?
- Canola oil
- Pine oil
- Coconut oil
- Brassica oil
Answer: Pine oil
Which of the following is/are chemical methods for ore concentration?
- Calcination
- Smelting & leaching
- Roasting
- All of these
Answer: All of these
Which ore is/are used for Zn extraction?
- Zincite
- Zinc blende
- Calamine
- All of these
Answer: Zinc blende
Which ore is/are used for Hg extraction?
- Cinnabar
- Zinc blende
- Calamine
- All of these
Answer: Cinnabar
Which is the second anciently known metal?
- Copper
- Nickel
- Silver
- Gold
Answer: Copper
Gun metal alloy consists of copper and ___.
- Zn
- Al
- Sn
- Ni
Answer: Sn
Which is the third most abundant element in the nature?
- Oxygen
- Aluminum
- Sulphur
- Hydrogen
Answer: Aluminum
Aluminum occurs in nature as which of the following?
- Native
- Free
- Both native & combined
- Combined
Answer: Combined
Which of the following is not an ore of aluminium?
- Bauxite
- Cryolite
- Monazite
- Mica
Answer: Monazite
Aluminium is typically extracted from which of the following?
- Feldspar
- Alumite
- Bauxite
- Cryolite
Answer: Bauxite
Which impurities are present with the bauxite?
- Silica
- Alumina
- Both silica and ferric oxide
- Ferric oxide
Answer: Both silica and ferric oxide
Which steps is/are involved in the metallurgy of aluminium?
- Electrolytic reduction of alumina
- Refining of aluminum
- Purification of bauxite
- All of these
Answer: All of these
Which of the following process is not involved in the purification of bauxite?
- Bayer’s process
- Goldsmith’s process
- Serpek’s process
- Hall’s process
Answer: Goldsmith’s process
In Serpek’s process the ore is treated with ________.
- Coke
- Nitrogen gas
- None of these
- Both A & B
Answer: Both A & B
What is the formula of Cryolite?
- NaзAIF4
- Na3AIF6
- Na3AIF3
- Na3AIF5
Answer: Na3AIF6
Which property is not correlated to aluminum?
- It is a silvery white metal with brilliant lustre
- It is malleable and ductile
- It is the least reactive element of III group
- It is a very light metal with specific gravity as 2.7
Answer: It is the least reactive element of III group
Which is not alloy of aluminium?
- Stellite
- Magnelium
- Aluminium bronze
- Duralumin
Answer: Stellite
Which element is a refractory substance?
- Cr
- Fe
- Al
- Ni
Answer: Al
Which of the following process is used to get pure Al (99.99%)?
- Hall’s process
- Serpek’s process
- Hopp’s process
- Bayer’s process
Answer: Hopp’s process
Which of the following is the second most abundant element occurring in the earth crust?
- Ni
- Iron
- Cr
- Cu
Answer: Iron
Which is not an ore of iron?
- Magnetite
- Monazite
- Haematite
- Siderite
Answer: Monazite
What is the total number of varieties of commercial iron that are still known?
- 4
- 2
- 1
- 3
Answer: 4

Which of the following is the purest form of iron?
- Steel
- Wrought iron
- Pig iron
- Cast iron
Answer: Wrought iron
________ is the Iron having up to 1% carbon.
- Pig iron
- Cast iron
- Steel
- Wrought iron
Answer: Steel
Which statement is not correct regarding Open Hearth process?
- Steel obtained is of high quality
- The process is economical and simple
- Scrap iron cannot be used in this process
- No iron is lost
Answer: Scrap iron cannot be used in this process
Which steel is hard and corrosion resistant?
- Stainless steel (Cr-steel)
- Mn-steel
- Si-steel
- Ni-steal
Answer: Stainless steel (Cr-steel)
Stainless steel consists of elements like ________.
- Fe & Ni
- Cr only
- Fe, Ni & Cr
- Fe only
Answer: Fe, Ni & Cr
Which of the following is the process in which iron changes over to a compound in environment?
- Corrosion
- Rusting
- Galvanization
- Annealing
Answer: Rusting
Which factors speed up rusting process?
- Presence of rust
- Contact with less active metal
- Presence of acidic environment
- All of these
Answer: All of these
Which step prevent rusting process?
- Painting
- Coating of Fe3O over iron surface
- Electroplating of iron with Cr/Ni
- All of these
Answer: All of these
Which of the following are the Solid compounds of metals which are found in nature?
- Minerals
- Ores
- Slag
- Gangue
Answer: Minerals
Which is the minerals from which a metal is extracted?
- Slag
- Gangue
- Minerals
- Ores
Answer: Ores
Which is/are the impurities which are present in ores?
- Gangue
- Slag
- Minerals
- Flux
Answer: Gangue
Which of the following is a chemical substance which is used to remove gangue from ore?
- Slag
- Matrix
- Flux
- Gangue
Answer: Flux
Which is/are the ores of Mg?
- Karnalite
- Magnesite
- Dolomite
- All of these
Answer: All of these
Which of the following is the compound formed by combination of impurities in the ores and foreign substance added?
- Gangue
- Slag
- Matrix
- Flux
Answer: Slag
Which materials is a slag?
- BaO
- CaO
- SiO2
- CaSiO2
Answer: CaSiO2
Chromium is found in nature in the form of
- Sulphides
- Silicates
- Oxides
- Borates
Answer: Oxides
Ferrochrome contains Cr up to
- 80-90%
- 70-80%
- 40-50%
- 60-70%
Answer: 60-70%

Which of the following is not a property of Cr?
- Its surface is tarnished easily
- It can take very high polish
- It is a brilliant silvery metal
- It is malleable
Answer: Its surface is tarnished easily
When red hot steel is rapidly cooled in water, then the process is known as ____.
- Tampering
- Roasting
- Annealing
- Quenching
Answer: Quenching
In nature nickel is found in which form?
- Arsenides
- Sulphides
- Silicates
- All
Answer: Arsenides
Which is not an ore of nickel?
- Nicollite
- Siderite
- Pentlandite
- Garnierite
Answer: Siderite
_________ % of nickel is existing in the major ore Pentlandite?
- 10%
- 22%
- 14%
- 18%
Answer: 22%
In smelting process the ore is mixed with which one?
- Silica
- Limestone
- Coke
- All
Answer: All
Monel metal is an alloy of Ni which contains Ni up to
- 80%
- 50%
- 70%
- 60%
Answer: 60%
Which of the following process is used for the conversion of matte into nickel?
- Electrolytic process
- Monds process
- Orford process
- All
Answer: All
Which of the following metals form volatile carbonyl with CO below 80°C?
- Ni
- Co
- Fe
- Cu
Answer: Ni
Which is not a property of Ni?
- It is malleable and ductile
- It is highly magnetic
- It has high electrical and thermal conductivities
- It is a soft silvery white metal
Answer: 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?
- Bessemerization
- Roasting
- Calcination
- Froth-floatation
Answer: 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?
- Calcination
- Froth-floatation
- Roasting
- Bessemerization
Answer: Roasting
Which is not an appropriate and proper use of Ni?
- It is used as catalyst
- It is attacked by alkalis
- It is used in alloy formation
- It is used in the preparation of Monel metal
Answer: It is attacked by alkalis
Which of the following is the process of heating to redness and then slow cooling?
- Hardening
- Annealing
- Tempering
- Quenching
Answer: Annealing
Which of the following is the process of extracting a metal in pure form from its ores?
- Crushing
- Grinding
- Dressing
- Metallurgy
Answer: Metallurgy
The matrix is usually in the form of _____
- Sand
- Rocks
- Limestone
- All of these
Answer: All of these
Copper occurs in nature as __.
- Both native and combined
- Combined
- Native
- None of these
Answer: Both native and combined
What are the principal ores of copper?
- Copper sulphides
- Copper oxides
- Copper carbonate
- Both sulphides and oxides
Answer: Both sulphides and oxides
What is the formula of copper pyrite?
- CuFeS
- CuFe2S
- CuFeS
- CuFeS2
Answer: CuFeS2
Copper is primarily extracted from which of the following ore?
- Oxides ores
- Carbonate ores
- Sulphide ores
- Non-sulphide ores
Answer: Sulphide ores
Which steps are involved in the extraction of copper?
- Roasting
- Bessemerization
- Smelting
- All of these
Answer: All of these
Copper deficiency in humans results in which disease?
- Parkinson’s disease
- Alzheimer’s disease
- Diabetes
- None of these
Answer: Parkinson’s disease
Which statement is not with respect to copper?
- Molten copper absorbs carbon dioxide
- It is a best conductor of heat and electricity.
- It forms alloys easily
- It is malleable and ductile
Answer: Molten copper absorbs carbon dioxide
Which statement is true regarding copper?
- It is used in electroplating
- Its salts are used as coloring materials
- Its salts are used as insecticides
- All are correct
Answer: All are correct
Which is an alloy of copper?
- Bronze
- Brass
- Monel Metal
- All
Answer: All
In German silver copper is alloyed with which metal?
- Zn
- Zn & Ni
- Al
- Ni
Answer: Zn & Ni
In Monel metal copper is alloyed with which metal?
- Mn
- Ni
- Fe
- All
Answer: Ni

Metals MCQs | Metallurgy
By: Prof. Dr. Fazal Rehman | Last updated: July 29, 2024

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