Damage to metal surface by mechanical action is called
Damage to metal surface by mechanical action is called
Which of the following are considered applications of ultrasonic testing ?
Which of the following are considered applications of ultrasonic testing ?
The expected efficiency of a single rivetted lap joint is of the order of 50%. If the thickness of the plate is increased four times, then the rivet diameter will have to be increased __________ times.
The expected efficiency of a single rivetted lap joint is of the order of 50%. If the thickness of the plate is increased four times, then the rivet diameter will have to be increased __________ times.
A freely floating object is stable, if its centre of buoyancy
A freely floating object is stable, if its centre of buoyancy
During decarburising of a plain carbon steel, the thickness of ferrite layer growth is proportional to
During decarburising of a plain carbon steel, the thickness of ferrite layer growth is proportional to
The trace metal present in insulin is
The trace metal present in insulin is
Ammonia gas can be dried by
Ammonia gas can be dried by
When the wavelength of incident X-rays increases, the angle of diffraction
When the wavelength of incident X-rays increases, the angle of diffraction
A spark ignition petrol engine has
A spark ignition petrol engine has
A material is capable of resisting softening at high temperature, because of its property termed as
A material is capable of resisting softening at high temperature, because of its property termed as
An atom bomb works on the principle of
An atom bomb works on the principle of
Coating provided on the electrodes used in the arc welding is not expected to
Coating provided on the electrodes used in the arc welding is not expected to
Cassiterite is an ore of
Cassiterite is an ore of
Common salt is produced from sea water in India generally by the __________ method.
Common salt is produced from sea water in India generally by the __________ method.
A steam carraying pipeline is insulated with two layers of insulating materials with the inferior insulation material forming the inner part. If the two insulating layers are interchanged, the heat conducted will
A steam carraying pipeline is insulated with two layers of insulating materials with the inferior insulation material forming the inner part. If the two insulating layers are interchanged, the heat conducted will
__________ joint is mostly used for joining pipes carrying water at low pressure.
__________ joint is mostly used for joining pipes carrying water at low pressure.
The majority charge carriers in p-type silicon are
The majority charge carriers in p-type silicon are
Most of the phosphorous present in the blast furnace burden enters into
Most of the phosphorous present in the blast furnace burden enters into
The capacity of a material to absorb energy depends upon both its strength & stiffness. The term 'stiffness' of a material is the opposite of its
The capacity of a material to absorb energy depends upon both its strength & stiffness. The term 'stiffness' of a material is the opposite of its
In cold working of metal as compared to its hot working
In cold working of metal as compared to its hot working
Which of the following has the highest density and the lowest melting point ?
Which of the following has the highest density and the lowest melting point ?
Nuclear fission of one atom of uranium⁻²35 produces the energy equivalent to about __________ MeV.
Nuclear fission of one atom of uranium⁻²35 produces the energy equivalent to about __________ MeV.
Fahrenheit and Centigrade scales have the same readings at
Fahrenheit and Centigrade scales have the same readings at
The most commonly used moderator in nuclear power plant is
The most commonly used moderator in nuclear power plant is
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 ?
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 ?
The factor of safety for brittle materials (having elongation < 5%) is based on the __________ stress.
The factor of safety for brittle materials (having elongation < 5%) is based on the __________ stress.
Spheriodising of a material is a/an __________ process.
Spheriodising of a material is a/an __________ process.
Thermal shock produced by cooling is more dengerous/deleterious than that produced by heating a surface, because of the reason that
Thermal shock produced by cooling is more dengerous/deleterious than that produced by heating a surface, because of the reason that
Annealing of cast iron
Annealing of cast iron
Quartz is a __________ material.
Quartz is a __________ material.
The following is a typical anionic collector used in flotation.
The following is a typical anionic collector used in flotation.
Machinability of hard alloys and tool steels is improved by
Machinability of hard alloys and tool steels is improved by
The temperature at which a gas, when subjected to Joule-Thomson expansion, neither cools or heats up, is termed as the __________ temperature. Above this temperature the gas heats up on throttling and below this the gas cools down.
The temperature at which a gas, when subjected to Joule-Thomson expansion, neither cools or heats up, is termed as the __________ temperature. Above this temperature the gas heats up on throttling and below this the gas cools down.
Austenite is not
Austenite is not
The preferred alloying element for low temperature applications of steel is
The preferred alloying element for low temperature applications of steel is
In connection with corrosion of metals, passivation is the process that
In connection with corrosion of metals, passivation is the process that
Production of a hollow product by inflation of a tube or parison is called the __________ process.
Production of a hollow product by inflation of a tube or parison is called the __________ process.
__________ number determines whether the fluid flow in an open channel is supercritical, critical or sub-critical.
__________ number determines whether the fluid flow in an open channel is supercritical, critical or sub-critical.
__________ test is the appropriate test to determine whether a material is ductile or brittle.
__________ test is the appropriate test to determine whether a material is ductile or brittle.
Which of the following absorbs maximum heat in a high pressure boiler ?
Which of the following absorbs maximum heat in a high pressure boiler ?
Sudden fall of atmospheric pressure by a large amount is an indication of the
Sudden fall of atmospheric pressure by a large amount is an indication of the
In the acid Bessemer process, the hot metal should have the following com-positon.
In the acid Bessemer process, the hot metal should have the following com-positon.
Thermoplastics are never moulded using
Thermoplastics are never moulded using
Sulphur is melted in the sulphuric acid plant most commonly by employing
Sulphur is melted in the sulphuric acid plant most commonly by employing
__________ welding will be the most suitable for butt welding two 20 cms thick boiler drum mild steel plates.
__________ welding will be the most suitable for butt welding two 20 cms thick boiler drum mild steel plates.
When water is sprayed on air, passing through an insulated chamber maintained at a temperature higher than the dew point of entering air but lower than its dry bulb temperature, then the air is
When water is sprayed on air, passing through an insulated chamber maintained at a temperature higher than the dew point of entering air but lower than its dry bulb temperature, then the air is
Good design of the casing of a centrifugal pump aims at minimising the
Good design of the casing of a centrifugal pump aims at minimising the
With increase in carbon percentage in steel, its
With increase in carbon percentage in steel, its
Water-tube boiler is the one, in which
Water-tube boiler is the one, in which
Cascade control is
Cascade control is
Fibre glass is a composite material of
Fibre glass is a composite material of
A solution which resists change in its pH value on addition of acid/alkali is called the __________ solution.
A solution which resists change in its pH value on addition of acid/alkali is called the __________ solution.
The maximum axial compression stress during cold upsetting of a cylinderical rod of radius (r) occurs at
The maximum axial compression stress during cold upsetting of a cylinderical rod of radius (r) occurs at
The thickness of oxide film is y at time t. If K₁, K₂ and K₃ are the temperature dependent constants, the parabolic law of oxidation is given by
The thickness of oxide film is y at time t. If K₁, K₂ and K₃ are the temperature dependent constants, the parabolic law of oxidation is given by
In a furnace with heating element temperature at 1700°C, the dominant machanism of heat transfer will be
In a furnace with heating element temperature at 1700°C, the dominant machanism of heat transfer will be
The capital & running costs of similar machines having unequal service life can be compared by the __________ method.
The capital & running costs of similar machines having unequal service life can be compared by the __________ method.
Unit molar solution of __________ is the best conductor of electricity.
Unit molar solution of __________ is the best conductor of electricity.
Austempering process results in the formation of __________ structure.
Austempering process results in the formation of __________ structure.
Depreciation of machines fails under the indirect expenses head. As per income tax regulations, it is calculated by the __________ method.
Depreciation of machines fails under the indirect expenses head. As per income tax regulations, it is calculated by the __________ method.
Basicity [%Cao + %MgO/% SiO₂) of the slag in Indian blast furnace is in the range of
Basicity [%Cao + %MgO/% SiO₂) of the slag in Indian blast furnace is in the range of
Blast furnace is a
Blast furnace is a
Mechanism/phenomenon involved in the improvement of fatigue strength of a material by shot peening is the
Mechanism/phenomenon involved in the improvement of fatigue strength of a material by shot peening is the
Water hammer is caused in steam carrying pipelines, because of
Water hammer is caused in steam carrying pipelines, because of
__________ are normally subjected to sub-zero treatment.
__________ are normally subjected to sub-zero treatment.
Maximum amount of thermal radiation is emitted at all wavelengths at any specified temperature by a/an __________ body.
Maximum amount of thermal radiation is emitted at all wavelengths at any specified temperature by a/an __________ body.
__________ can not increase the fatigue strength of a material.
__________ can not increase the fatigue strength of a material.
Larger length & diameter water pipes are made by
Larger length & diameter water pipes are made by
The maximum percentage of chromium that can be added to steel is about
The maximum percentage of chromium that can be added to steel is about
An ideal fluid is
An ideal fluid is
Bad odour in sanitary latrines is reduced by periodically sprinkling
Bad odour in sanitary latrines is reduced by periodically sprinkling
While the bin cards are used in the effective stores management, the queing theory is associated with the __________ time.
While the bin cards are used in the effective stores management, the queing theory is associated with the __________ time.
Gage pressure within a spherical droplet of a fluid is 'p'. What will be gage pressure within a bubble of the same size & of the same fluid ?
Gage pressure within a spherical droplet of a fluid is 'p'. What will be gage pressure within a bubble of the same size & of the same fluid ?
Lead is poured into the joint between two- __________ pipes.
Lead is poured into the joint between two- __________ pipes.
Resilience of a bolt can be increased by increasing its
Resilience of a bolt can be increased by increasing its
Cast iron has the unique property of high
Cast iron has the unique property of high
Case hardening is not done by
Case hardening is not done by
Carburettor in a spark ignition engine is used to
Carburettor in a spark ignition engine is used to
An alloy of Fe - 0.4 % C is
An alloy of Fe - 0.4 % C is
The hardenability of steel decreases with
The hardenability of steel decreases with
Which of the following phenomenon will exhibit the minimum heat transfer?
Which of the following phenomenon will exhibit the minimum heat transfer?
Streaklines, streamlines & pathlines are almost identical for __________ fluid flow.
Streaklines, streamlines & pathlines are almost identical for __________ fluid flow.
Wave length of X-rays is about 1 angstron, however it can not pass through a sheet of
Wave length of X-rays is about 1 angstron, however it can not pass through a sheet of
Cast iron has the unique property of high
Cast iron has the unique property of high
The dimensions of Planck's constant is the same as that of the
The dimensions of Planck's constant is the same as that of the
What is the range of tempering temperature (°C) for most of the materials ?
What is the range of tempering temperature (°C) for most of the materials ?
Work study deals with the __________ study.
Work study deals with the __________ study.
Pick out the wrong statement.
Pick out the wrong statement.
Screws are specified by their __________ diameters.
Screws are specified by their __________ diameters.
With increase in compression ratio, the volumetric efficiency of air compressor
With increase in compression ratio, the volumetric efficiency of air compressor
Brazing is the joining of metals
Brazing is the joining of metals
Primary designation of steel is based on its
Primary designation of steel is based on its
The highest stress that a material can withstand for a specified length of time without excessive deformation is called the __________ strength.
The highest stress that a material can withstand for a specified length of time without excessive deformation is called the __________ strength.
Which of the following hardness tests does not measure the indentation hardness of metals and alloys ?
Which of the following hardness tests does not measure the indentation hardness of metals and alloys ?
Percentage of gaunge is maximum in the ore of
Percentage of gaunge is maximum in the ore of
Force between the molecules of the same substance is called __________ force.
Force between the molecules of the same substance is called __________ force.
Dislocations are __________ defects.
Dislocations are __________ defects.
Vernier calipers can not be used to measure the
Vernier calipers can not be used to measure the
Heat transfer by radiation from a hot body will be most rapid, if its surface is __________ because of its higher emissivity.
Heat transfer by radiation from a hot body will be most rapid, if its surface is __________ because of its higher emissivity.
With increase in pressure, the saturation temperature of steam
With increase in pressure, the saturation temperature of steam
Which of the following is the terminology used for the temperature at which the phase changes occur in a metal ?
Which of the following is the terminology used for the temperature at which the phase changes occur in a metal ?
