To improve the machinability of steel, it is generally subjected to

Question

To improve the machinability of steel, it is generally subjected to

A. Spheroidising

B. Tempering

C. Normalising

D. Annealing

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Which of the following rays has the least wavelength?

A. Ultraviolet rays

B. Infrared rays

C. Cosmic rays

D. X-rays

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Wrought iron is not

A. Ductile & resistant to corrosion/rusting

B. Weldable easily

C. Having uniform strength in all directions

D. Having maximum tensile strength along the lines of slag distribution

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Which of the following forces does not act on a fluid at rest?

A. Viscous force

B. Gravity force

C. Hydrostatic force

D. Surface tension force

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Minimum temperature upto which water can be theoretically cooled down in the cooling tower by evaporative cooling is equal to the __________ temperature of air.

A. Wet bulb

B. Dry bulb

C. Saturation

D. Dew point

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Factor of safety is the ratio of the __________ stress to the working stress.

A. Tensile

B. Compressive

C. Yield

D. Bearing

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Fibre glass is a composite material of

A. Glass fibre in a polymer matrix

B. Glass fibre in a metallic matrix

C. Polymer fibre in a glassy matrix

D. Both 'b' & 'c'

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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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Hot & cold working of material causes its __________ deformation.

A. Visco-elastic

B. Isotropic

C. Elastic

D. Plastic

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Atomic __________ is a whole number for an element.

A. Number

B. Weight

C. Radius

D. None of these

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The difference in one unit of Rockwell hardness number corresponds to a difference in the depth of indentation of __________ mm.

A. 0.001

B. 0.01

C. 0.002

D. 0.02

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Steel containing low percentage of nickel, chromium & tungsten are termed as the __________ steel.

A. Wrought

B. Tool

C. Alloy

D. Plain carbon

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A metal having a Poisson's ratio = 0.3 is elastically deformed under uniaxial tension. If the longitudinal strain = 0.8, then the magnitude of thickness strain is

A. -0.8

B. 0.8

C. +0.08

D. -0.24

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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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__________ glass is used in the mercury in glass thermometer meant for measuring a temperature of 500°C.

A. Borosilicate

B. High silica

C. Supermax

D. Lead

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Silicon crystal can be converted to p-type semiconductor by doping with

A. Phosphorous

B. Nitrogen

C. Carbon

D. Boron

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Common salt is produced from sea water in India generally by the __________ method.

A. Freeze drying

B. Solar evaporation

C. Electrolytic

D. None of these

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In Newton's law of viscosity, which states that the shear stress is proportional to the __________ Co-efficient of viscosity is called dynamic or absolute viscosity(where, V = velocity, = velocity gradient).

A.

B.

C.

D.

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Which of the following parameters is not responsible for the heat loss from a hot steam carrying bare pipe surface located in a room without fans?

A. Emissivity of pipe surface

B. Diameter & length of the pipe

C. Temperature of hot pipe surface & that of air in the room

D. None of these

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Wood is a/an __________ material.

A. Amorphous

B. Cellular

C. Homogeneous

D. Granular

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Heat flow across a hollow sphere of inner radius 'r₁' and outer radius 'r₂' is directly proportional to

A. (r₂ - r₁)/r₁. r₂

B. r₁. r₂/(r₂- r₁)

C. (r₂ + r₁)/r₁. r₂

D. r₁. r₂/(r₂ + r₁)

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The temperature at which the magnetic property of iron disappears (i.e., it becomes non-magnetic) and its electrical conductivity & specific heat also changes, is called the 'Curie point', which is __________ °C.

A. 768

B. 908

C. 1400

D. 1539

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Cold cracking in the heat affected zone of a high strength steel weld can take place because of the

A. Retained austenite

B. Martensite formation

C. Relatively high sulphur content in the base metal

D. Sufficient hydrogen present in the welding arc

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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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Theoretical volume of oxygen required for complete combustion of 1Nm³ of acetylene, in oxyacetylene welding is __________ Nm³.

A. 0.5

B. 1

C. 1/3

D. 2.5

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Solidification time of a molten metal in a casting is proportional to (where, V = volume of metal & A = its surface area; in the casting)

A. V/A

B. V/A²

C. V²/A

D. V²/A²

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The stress at which extension of the material takes place more rapidly as compared to the increase in load is termed as the __________ point of the material.

A. Elastic

B. Ultimate

C. Yielding

D. Breaking

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Force between the molecules of the same substance is called __________ force.

A. Adhesive

B. Cohesive

C. Molecular

D. Vander Walls

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Which of the following does not have a sharp melting point?

A. Thoria

B. Glass

C. Ice

D. Pig iron

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Heat required to raise the temperature of a body by 1 °C is called its

A. Heat capacity

B. Specific heat capacity

C. Thermal conductivity

D. Water equivalent

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Joule-Thomson co-efficient is the ratio of

A. Pressure change to temperature change occuring during adiabatic compression of a gas

B. Pressure change to temperature change occuring during adiabatic throttling of a gas

C. Temperature change to pressure change occuring during adiabatic compression of a gas

D. Temperature change to pressure change occuring during adiabatic throttling of a gas

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Accepted Answer

A. Spheroidising

To improve the machinability of steel, it is generally subjected to

Correct Answer :

Show all Chemical Engineering Basics MCQ

Related Questions

Which of the following rays has the least wavelength?

Wrought iron is not

Which of the following forces does not act on a fluid at rest?

Minimum temperature upto which water can be theoretically cooled down in the cooling tower by evaporative cooling is equal to the __________ temperature of air.

Factor of safety is the ratio of the __________ stress to the working stress.

Fibre glass is a composite material of

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

Hot & cold working of material causes its __________ deformation.

Atomic __________ is a whole number for an element.

The difference in one unit of Rockwell hardness number corresponds to a difference in the depth of indentation of __________ mm.

Steel containing low percentage of nickel, chromium & tungsten are termed as the __________ steel.

A metal having a Poisson's ratio = 0.3 is elastically deformed under uniaxial tension. If the longitudinal strain = 0.8, then the magnitude of thickness strain is

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

__________ glass is used in the mercury in glass thermometer meant for measuring a temperature of 500°C.

Silicon crystal can be converted to p-type semiconductor by doping with

Common salt is produced from sea water in India generally by the __________ method.

In Newton's law of viscosity, which states that the shear stress is proportional to the __________ Co-efficient of viscosity is called dynamic or absolute viscosity(where, V = velocity, = velocity gradient).

Which of the following parameters is not responsible for the heat loss from a hot steam carrying bare pipe surface located in a room without fans?

Wood is a/an __________ material.

Heat flow across a hollow sphere of inner radius 'r₁' and outer radius 'r₂' is directly proportional to

The temperature at which the magnetic property of iron disappears (i.e., it becomes non-magnetic) and its electrical conductivity & specific heat also changes, is called the 'Curie point', which is __________ °C.

Cold cracking in the heat affected zone of a high strength steel weld can take place because of the

Fog is an example of colloidal system of

Theoretical volume of oxygen required for complete combustion of 1Nm³ of acetylene, in oxyacetylene welding is __________ Nm³.

Solidification time of a molten metal in a casting is proportional to (where, V = volume of metal & A = its surface area; in the casting)

The stress at which extension of the material takes place more rapidly as compared to the increase in load is termed as the __________ point of the material.

Force between the molecules of the same substance is called __________ force.

Which of the following does not have a sharp melting point?

Heat required to raise the temperature of a body by 1 °C is called its

Joule-Thomson co-efficient is the ratio of

Also checkout

To improve the machinability of steel, it is generally subjected to

Correct Answer :

Show all Chemical Engineering Basics MCQ

Related Questions

Which of the following rays has the least wavelength?

Wrought iron is not

Which of the following forces does not act on a fluid at rest?

Minimum temperature upto which water can be theoretically cooled down in the cooling tower by evaporative cooling is equal to the __________ temperature of air.

Factor of safety is the ratio of the __________ stress to the working stress.

Fibre glass is a composite material of

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

Hot & cold working of material causes its __________ deformation.

Atomic __________ is a whole number for an element.

The difference in one unit of Rockwell hardness number corresponds to a difference in the depth of indentation of __________ mm.

Steel containing low percentage of nickel, chromium & tungsten are termed as the __________ steel.

A metal having a Poisson's ratio = 0.3 is elastically deformed under uniaxial tension. If the longitudinal strain = 0.8, then the magnitude of thickness strain is

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

__________ glass is used in the mercury in glass thermometer meant for measuring a temperature of 500°C.

Silicon crystal can be converted to p-type semiconductor by doping with

Common salt is produced from sea water in India generally by the __________ method.

In Newton's law of viscosity, which states that the shear stress is proportional to the __________ Co-efficient of viscosity is called dynamic or absolute viscosity(where, V = velocity, = velocity gradient).

Which of the following parameters is not responsible for the heat loss from a hot steam carrying bare pipe surface located in a room without fans?

Wood is a/an __________ material.

Heat flow across a hollow sphere of inner radius 'r1' and outer radius 'r2' is directly proportional to

The temperature at which the magnetic property of iron disappears (i.e., it becomes non-magnetic) and its electrical conductivity & specific heat also changes, is called the 'Curie point', which is __________ °C.

Cold cracking in the heat affected zone of a high strength steel weld can take place because of the

Fog is an example of colloidal system of

Theoretical volume of oxygen required for complete combustion of 1Nm3 of acetylene, in oxyacetylene welding is __________ Nm3.

Solidification time of a molten metal in a casting is proportional to (where, V = volume of metal & A = its surface area; in the casting)

The stress at which extension of the material takes place more rapidly as compared to the increase in load is termed as the __________ point of the material.

Force between the molecules of the same substance is called __________ force.

Which of the following does not have a sharp melting point?

Heat required to raise the temperature of a body by 1 °C is called its

Joule-Thomson co-efficient is the ratio of

Also checkout

Heat flow across a hollow sphere of inner radius 'r₁' and outer radius 'r₂' is directly proportional to

Theoretical volume of oxygen required for complete combustion of 1Nm³ of acetylene, in oxyacetylene welding is __________ Nm³.