Aluminium is extracted from

Question

Aluminium is extracted from

A. Chalcocite

B. Bauxite

C. Galena

D. None of these

Share this question with your friends

Show all Chemical Engineering Basics MCQ

Comment

What is the value of included angle of a triangular notch for maximum discharge?

A. 30°

B. 60°

C. 90°

D. 120°

Discuss this answer

In Imperial Smelting Process for extraction of zinc, zinc vapour thus produced is quenched in the external condenser by the use of the following:

A. Jet of water at high pressure

B. Blast of air

C. Mixture of water and air

D. Rain of molten lead

Discuss this answer

For a spontaneous natural process at constant temperature and pressure, the free energy of the system always

A. Increases

B. Decreases

C. Remain constant

D. Increases to a maximum before decreasing

Discuss this answer

The 'transition temperature' for ductile to brittle behaviour of steel increases with increase in the __________ content in steel.

A. Carbon

B. Manganese

C. Both 'a' nor 'b'

D. Neither 'a' nor 'b'

Discuss this answer

A highly elastic material is deformed least on loading and retains its original form on removal of the load. Which of the following is the most elastic material?

A. Steel

B. Glass

C. Rubber

D. Brass

Discuss this answer

Pearlite comprises of

A. 87% cementite & 13% Fe

B. 87% ferrite & 13% cementite

C. 93.33% ferrite & 6.67% C

D. 87% ferrite & 13% C

Discuss this answer

A material subjected __________ must have high resilience.

A. Shock loading

B. Vibration

C. Fatigue

D. Tension

Discuss this answer

Heating the Hypo-eutectoid steels to 30°C above the upper critical temperature line, soaking at that temperature and then cooling slowly to the room temperature to form a pearlite & ferrite structure is called

A. Tempering

B. Hardening

C. Annealing

D. Normalising

Discuss this answer

The most prominent single cause of corrosion in boiler-tubes, drums, economisers and steam superheaters in a thermal power plant boiler is the

A. Water alkalinity & leakage

B. Hydrazine addition during feed water treatment

C. Release of non-condensable gas from water in the boiler

D. Scale formation

Discuss this answer

__________ is used as a material of construction for the blade of power saw.

A. Wrought iron

B. Stainless steel

C. Mild steel

D. High speed steel

Discuss this answer

__________ stress cannot be sustained by a fluid in equilibrium.

A. Shear

B. Tensile

C. Compressive

D. None of these

Discuss this answer

Compressed dry air is used as the cutting fluid, while machining

A. Steel

B. Cast iron

C. Aluminium

D. None of these

Discuss this answer

The activity of pure hydrogen gas at 1000°C and 5 atm pressure

A. Is always less than 1

B. Is always greater than 1

C. Can be 5

D. Depends on the choice of the standard state

Discuss this answer

Hot & cold working of material causes its __________ deformation.

A. Visco-elastic

B. Isotropic

C. Elastic

D. Plastic

Discuss this answer

Superheating of steam is done at constant

A. Enthalpy

B. Entropy

C. Pressure

D. Volume

Discuss this answer

Projection welding & stud welding is categorised as the __________ welding.

A. Pressure

B. Thermit

C. Resistance

D. Arc

Discuss this answer

Dielectric

A. Is an electrical insulating material

B. Of low resistivity is preferred

C. Should have high thermal conductivity

D. Need not defy the corrosive action of chemicals

Discuss this answer

For separating small pieces of metal from engine oil of a car, the best separating technique is the

A. Chromatography

B. Evaporation

C. Filtration

D. Fractional distillation

Discuss this answer

With increase in temperature, the surface tension of water

A. Increases

B. Decreases

C. Remain constant

D. Increases linearly

Discuss this answer

__________ wire is never used for making the heating element.

A. Nichrome

B. Kanthal

C. Invar

D. None of these

Discuss this answer

The product (s) of roasting of a sulphide ore is (are)

A. Oxide only

B. Sulphate only

C. Oxide and sulphate

D. Dependent on temperature and partial pressure of oxygen & sulphur dioxide

Discuss this answer

Blasting of tri-nitro-toluene (TNT) is done by mixing it with ammonium

A. Nitrate

B. Sulphate

C. Carbonate

D. Chloride

Discuss this answer

The majority charge carriers in p-type silicon are

A. Free electrons

B. Ions

C. Conduction electrons

D. Holes

Discuss this answer

Work done by a/an __________ process is determined by ∫p. dv

A. Adiabatic

B. Quasi-static

C. Isothermal

D. Isentropic

Discuss this answer

Consider the equilibrium A(g) + B(g) = AB(g). When the partial pressure of A is 10-2 atm, the partial pressure of B is 10-3 atm and the partial pressure of AB is 1 atm, the equilibrium constant 'K' is

A. 10 atm-1

B. 105 atm-1

C. 10 (dimensionless)

D. 105 (dimensionless)

Discuss this answer

Out of the following, which will fracture most readity, when hit with a hard hammer?

A. Brass

B. Bronze

C. German silver

D. Cast iron

Discuss this answer

Often earing defects are found during deep drawing operation, because the

A. Surface finish of the sheet is poor

B. Sheet material has been given substantial spring back

C. Starting sheet has planer anisotropy due to its texture

D. Starting sheet has normal anisotropy due to its texture

Discuss this answer

While the recrystallisation temperature for pure metals is 0.3 T_m, the same for alloys is equal to __________ × T_m (where, T_m Melting temperature).

A. 0.25

B. 0.45

C. 0.70

D. 0.95

Discuss this answer

Fatigue limit improvement by over stressing the metal by successively increasing the load is called coaxing. In fatigue failure, the material fails

A. Below the yield point

B. Above the yield point

C. Below the elastic limit

D. At the elastic limit

Discuss this answer

Dew point temperature always gives an indication of the __________ of the moist air.

A. Dryness

B. Moisture content

C. Coolness

D. Latent heat

Discuss this answer

Accepted Answer

B. Bauxite

Aluminium is extracted from

Correct Answer :

Show all Chemical Engineering Basics MCQ

Related Questions

What is the value of included angle of a triangular notch for maximum discharge?

In Imperial Smelting Process for extraction of zinc, zinc vapour thus produced is quenched in the external condenser by the use of the following:

For a spontaneous natural process at constant temperature and pressure, the free energy of the system always

The 'transition temperature' for ductile to brittle behaviour of steel increases with increase in the __________ content in steel.

A highly elastic material is deformed least on loading and retains its original form on removal of the load. Which of the following is the most elastic material?

Pearlite comprises of

A material subjected __________ must have high resilience.

Heating the Hypo-eutectoid steels to 30°C above the upper critical temperature line, soaking at that temperature and then cooling slowly to the room temperature to form a pearlite & ferrite structure is called

The most prominent single cause of corrosion in boiler-tubes, drums, economisers and steam superheaters in a thermal power plant boiler is the

__________ is used as a material of construction for the blade of power saw.

__________ stress cannot be sustained by a fluid in equilibrium.

Compressed dry air is used as the cutting fluid, while machining

The activity of pure hydrogen gas at 1000°C and 5 atm pressure

Hot & cold working of material causes its __________ deformation.

Superheating of steam is done at constant

Projection welding & stud welding is categorised as the __________ welding.

Dielectric

For separating small pieces of metal from engine oil of a car, the best separating technique is the

With increase in temperature, the surface tension of water

__________ wire is never used for making the heating element.

The product (s) of roasting of a sulphide ore is (are)

Blasting of tri-nitro-toluene (TNT) is done by mixing it with ammonium

The majority charge carriers in p-type silicon are

Work done by a/an __________ process is determined by ∫p. dv

Consider the equilibrium A(g) + B(g) = AB(g). When the partial pressure of A is 10-2 atm, the partial pressure of B is 10-3 atm and the partial pressure of AB is 1 atm, the equilibrium constant 'K' is

Out of the following, which will fracture most readity, when hit with a hard hammer?

Often earing defects are found during deep drawing operation, because the

While the recrystallisation temperature for pure metals is 0.3 T_m, the same for alloys is equal to __________ × T_m (where, T_m Melting temperature).

Fatigue limit improvement by over stressing the metal by successively increasing the load is called coaxing. In fatigue failure, the material fails

Dew point temperature always gives an indication of the __________ of the moist air.

Also checkout

Aluminium is extracted from

Correct Answer :

Show all Chemical Engineering Basics MCQ

Related Questions

What is the value of included angle of a triangular notch for maximum discharge?

In Imperial Smelting Process for extraction of zinc, zinc vapour thus produced is quenched in the external condenser by the use of the following:

For a spontaneous natural process at constant temperature and pressure, the free energy of the system always

The 'transition temperature' for ductile to brittle behaviour of steel increases with increase in the __________ content in steel.

A highly elastic material is deformed least on loading and retains its original form on removal of the load. Which of the following is the most elastic material?

Pearlite comprises of

A material subjected __________ must have high resilience.

Heating the Hypo-eutectoid steels to 30°C above the upper critical temperature line, soaking at that temperature and then cooling slowly to the room temperature to form a pearlite & ferrite structure is called

The most prominent single cause of corrosion in boiler-tubes, drums, economisers and steam superheaters in a thermal power plant boiler is the

__________ is used as a material of construction for the blade of power saw.

__________ stress cannot be sustained by a fluid in equilibrium.

Compressed dry air is used as the cutting fluid, while machining

The activity of pure hydrogen gas at 1000°C and 5 atm pressure

Hot & cold working of material causes its __________ deformation.

Superheating of steam is done at constant

Projection welding & stud welding is categorised as the __________ welding.

Dielectric

For separating small pieces of metal from engine oil of a car, the best separating technique is the

With increase in temperature, the surface tension of water

__________ wire is never used for making the heating element.

The product (s) of roasting of a sulphide ore is (are)

Blasting of tri-nitro-toluene (TNT) is done by mixing it with ammonium

The majority charge carriers in p-type silicon are

Work done by a/an __________ process is determined by ∫p. dv

Consider the equilibrium A(g) + B(g) = AB(g). When the partial pressure of A is 10-2 atm, the partial pressure of B is 10-3 atm and the partial pressure of AB is 1 atm, the equilibrium constant 'K' is

Out of the following, which will fracture most readity, when hit with a hard hammer?

Often earing defects are found during deep drawing operation, because the

While the recrystallisation temperature for pure metals is 0.3 Tm, the same for alloys is equal to __________ × Tm (where, Tm Melting temperature).

Fatigue limit improvement by over stressing the metal by successively increasing the load is called coaxing. In fatigue failure, the material fails

Dew point temperature always gives an indication of the __________ of the moist air.

Also checkout

While the recrystallisation temperature for pure metals is 0.3 T_m, the same for alloys is equal to __________ × T_m (where, T_m Melting temperature).