Pick out the correct combination about the role of various additives used in polymers.

Question

Pick out the correct combination about the role of various additives used in polymers.

A. Plasticiser: increases the polymer strength

B. Heat stabiliser: increases the maximum service temperature

C. Fillers: Does not affect the property of polymer but increases its weight

D. Lubricants: increases the flexibility of polymers

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All of the following alloying elements of steel increases hardness but sacrifice ductility, except

A. Nickel

B. Vanadium

C. Molybdenum

D. Chromium

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The lightest non-inflammable gas is

A. H2

B. He

C. Ar

D. O2

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Fog is an example of colloidal system of

A. Solid dispersed in gas

B. Solid dispersed in liquid

C. Liquid dispersed in gas

D. Gas dispersed in liquid

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Volumetric composition of flue gas analysed with the Orsat apparatus is : CO₂ = 12%, O₂ = 8%, CO = nil, N₂ = 80%. This flue gas composition indicates that

A. Pure oxygen has been used for combustion

B. Nitrogen percentage in the fuel is very high

C. Excess air has been used for combustion

D. Hydrogen is not present in the fuel

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__________ iron is produced by the annealing of white cast iron.

A. Malleable

B. Nodular

C. Ductile

D. Grey

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Which of the following contributes maximum as main source of sulphur in the blast furnace charge?

A. Sinter

B. Coke

C. Iron ore

D. Limestone

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Density in the solid state is slightly less than that in its liquid state, in case of

A. Carbon dioxide

B. Water

C. Mercury

D. None of these

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Thermal diffusivity of a substance is proportional to (where, k = Thermal conductivity)

A. 1/k

B. k

C. k²

D. 1/k²

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Cemented carbide tools are not suitable for cutting

A. Aluminium

B. Brass

C. Cast iron

D. Steel

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Machinability of hard alloys and tool steels is improved by

A. Spheroidising

B. Annealing

C. Tempering

D. Normalising

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Consideration of the creep is the most important in case of the

A. Blades of gas turbine

B. Piston of an I. C. engine

C. Flywheel of steam engine

D. Cycle chain

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With increase in temperature, the surface tension of water

A. Increases

B. Decreases

C. Remain constant

D. Increases linearly

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__________ of hard alloy and tool steel is done to make it easily machinable.

A. Case carburising

B. Tempering

C. Normalising

D. Annealing

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The most abundant metal present in the earth's crust is;

A. Iron

B. Copper

C. Titanium

D. Aluminium

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An ideal material for making cooking vessels should have

A. High heat capacity

B. Low heat capacity

C. High thermal conductivity

D. Both (B) and (C)

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Cold heading or upsetting is categorised as the __________ process.

A. Extrusion

B. Bending

C. Rolling

D. Forging

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Coating provided on the electrodes used in the arc welding is not expected to

A. Add alloying elements

B. Prevent electrode from contamination

C. Stabilise the arc

D. Provide protective atmosphere to weld

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In case of brasses, with decreasing zinc percentage and increasing copper percentage, its __________ increases.

A. Percentage elongation

B. Brinell hardness

C. Tensile strength

D. All 'a', 'b' & 'c'

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Square steel key is normally strong in failure by shear & crushing. Keys are normally made of __________ steel bars.

A. Hot rolled mild

B. Cold rolled mild

C. Forged

D. Machinable stainless

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The elastic strain energy of a unit length of an edge dislocation as compared to that of a screw dislocation is

A. More

B. Equal

C. Less

D. Double

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Addition of small amount of __________ to grey cast iron is done to produce nodular grey cast iron.

A. Manganese

B. Phosphorous

C. Magnesium

D. Chromium

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Hardening of steel is not possible, unless it is heated __________ critical point.

A. Above the highest

B. Above the lowest

C. Between the first & second

D. Between the second & third

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Specific __________ is a dimensionless quantity.

A. Heat

B. Humidity

C. Weight

D. None of these

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Air intake for an air compressor should be preferably taken from

A. A site, where cooling towers are located nearby

B. A site, where open coal yard in located nearby

C. An air conditioned room maintained at a temperature of 18°C

D. An outside atmosphere at 10°C

Discuss this answer

An oxidation process is accompanied with decrease in the

A. Number of electrons

B. Oxidation number

C. Number of ions

D. All (A), (B) & (C)

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Which of the following fastening devices has a head at one end and a nut fitted to the other?

A. Bolt

B. Stud

C. Top bolt

D. None of these

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The Al₂O₃ content of cryolite in Hall- Heroult cell is maintained between __________ percent.

A. 2-5

B. 18-20

C. 12-15

D. 6-12

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Out of the following the refractive index is the highest for

A. Glass

B. Diamond

C. Brine

D. Kerosene

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Case hardening is not done by

A. Nitriding

B. Hot dipping

C. Electroplating

D. Both b & c

Discuss this answer

Which of the following is an acidic constituent of B.F. slag?

A.

B. FeO

C. MgO

D. CaO

Discuss this answer

Accepted Answer

C. Fillers: Does not affect the property of polymer but increases its weight

Pick out the correct combination about the role of various additives used in polymers.

Correct Answer :

Show all Chemical Engineering Basics MCQ

Related Questions

All of the following alloying elements of steel increases hardness but sacrifice ductility, except

The lightest non-inflammable gas is

Fog is an example of colloidal system of

Volumetric composition of flue gas analysed with the Orsat apparatus is : CO₂ = 12%, O₂ = 8%, CO = nil, N₂ = 80%. This flue gas composition indicates that

__________ iron is produced by the annealing of white cast iron.

Which of the following contributes maximum as main source of sulphur in the blast furnace charge?

Density in the solid state is slightly less than that in its liquid state, in case of

Thermal diffusivity of a substance is proportional to (where, k = Thermal conductivity)

Cemented carbide tools are not suitable for cutting

Machinability of hard alloys and tool steels is improved by

Consideration of the creep is the most important in case of the

With increase in temperature, the surface tension of water

__________ of hard alloy and tool steel is done to make it easily machinable.

The most abundant metal present in the earth's crust is;

An ideal material for making cooking vessels should have

Cold heading or upsetting is categorised as the __________ process.

Coating provided on the electrodes used in the arc welding is not expected to

In case of brasses, with decreasing zinc percentage and increasing copper percentage, its __________ increases.

Square steel key is normally strong in failure by shear & crushing. Keys are normally made of __________ steel bars.

The elastic strain energy of a unit length of an edge dislocation as compared to that of a screw dislocation is

Addition of small amount of __________ to grey cast iron is done to produce nodular grey cast iron.

Hardening of steel is not possible, unless it is heated __________ critical point.

Specific __________ is a dimensionless quantity.

Air intake for an air compressor should be preferably taken from

An oxidation process is accompanied with decrease in the

Which of the following fastening devices has a head at one end and a nut fitted to the other?

The Al₂O₃ content of cryolite in Hall- Heroult cell is maintained between __________ percent.

Out of the following the refractive index is the highest for

Case hardening is not done by

Which of the following is an acidic constituent of B.F. slag?

Also checkout

Pick out the correct combination about the role of various additives used in polymers.

Correct Answer :

Show all Chemical Engineering Basics MCQ

Related Questions

All of the following alloying elements of steel increases hardness but sacrifice ductility, except

The lightest non-inflammable gas is

Fog is an example of colloidal system of

Volumetric composition of flue gas analysed with the Orsat apparatus is : CO2 = 12%, O2 = 8%, CO = nil, N2 = 80%. This flue gas composition indicates that

__________ iron is produced by the annealing of white cast iron.

Which of the following contributes maximum as main source of sulphur in the blast furnace charge?

Density in the solid state is slightly less than that in its liquid state, in case of

Thermal diffusivity of a substance is proportional to (where, k = Thermal conductivity)

Cemented carbide tools are not suitable for cutting

Machinability of hard alloys and tool steels is improved by

Consideration of the creep is the most important in case of the

With increase in temperature, the surface tension of water

__________ of hard alloy and tool steel is done to make it easily machinable.

The most abundant metal present in the earth's crust is;

An ideal material for making cooking vessels should have

Cold heading or upsetting is categorised as the __________ process.

Coating provided on the electrodes used in the arc welding is not expected to

In case of brasses, with decreasing zinc percentage and increasing copper percentage, its __________ increases.

Square steel key is normally strong in failure by shear & crushing. Keys are normally made of __________ steel bars.

The elastic strain energy of a unit length of an edge dislocation as compared to that of a screw dislocation is

Addition of small amount of __________ to grey cast iron is done to produce nodular grey cast iron.

Hardening of steel is not possible, unless it is heated __________ critical point.

Specific __________ is a dimensionless quantity.

Air intake for an air compressor should be preferably taken from

An oxidation process is accompanied with decrease in the

Which of the following fastening devices has a head at one end and a nut fitted to the other?

The Al2O3 content of cryolite in Hall- Heroult cell is maintained between __________ percent.

Out of the following the refractive index is the highest for

Case hardening is not done by

Which of the following is an acidic constituent of B.F. slag?

Also checkout

Volumetric composition of flue gas analysed with the Orsat apparatus is : CO₂ = 12%, O₂ = 8%, CO = nil, N₂ = 80%. This flue gas composition indicates that

The Al₂O₃ content of cryolite in Hall- Heroult cell is maintained between __________ percent.