__________ is not a case hardening process.
__________ is not a case hardening process.
Wohler test is a destructive test to find out the __________ strength of a prepared metal specimen.
Wohler test is a destructive test to find out the __________ strength of a prepared metal specimen.
To improve the machinability of steel, it is generally subjected to
To improve the machinability of steel, it is generally subjected to
Dezincification is a form of corrosion, which specifically applies to
Dezincification is a form of corrosion, which specifically applies to
The size of the tetrahedral void in the closest packing of atoms is __________ that of the octahedral void.
The size of the tetrahedral void in the closest packing of atoms is __________ that of the octahedral void.
Nitrogen is not an essential component of
Nitrogen is not an essential component of
Filler material used in welding having the lowest melting point out of the following is
Filler material used in welding having the lowest melting point out of the following is
The process of removal of scale formed during hot rolling of steel is termed as
The process of removal of scale formed during hot rolling of steel is termed as
If the head is doubled in & centrifugal pump, the power required will increase in the ratio of
If the head is doubled in & centrifugal pump, the power required will increase in the ratio of
The most suitable material of construction for a sewer to carry sewage under high pressure is
The most suitable material of construction for a sewer to carry sewage under high pressure is
Lead is added to 60:40 brass primarily to improve
Lead is added to 60:40 brass primarily to improve
Tempering of a material does not improve its
Tempering of a material does not improve its
The predominant mode of heat transfer which takes place from boiler furnace to water walls of a boiler is
The predominant mode of heat transfer which takes place from boiler furnace to water walls of a boiler is
Out of the following, the dimensionless quantity is
Out of the following, the dimensionless quantity is
Oxygen cylinders used for autogenous (cutting/welding) purposes are
Oxygen cylinders used for autogenous (cutting/welding) purposes are
The property of material, by which a given amount of energy is absorbed by it, without plastic deformation is called
The property of material, by which a given amount of energy is absorbed by it, without plastic deformation is called
What is the effect on the performance of the economiser in the thermal power plant boiler, if the feed water temperature is very low due to preheaters being out for repairs or starving of steam supply ?
What is the effect on the performance of the economiser in the thermal power plant boiler, if the feed water temperature is very low due to preheaters being out for repairs or starving of steam supply ?
Air/fuel ratio by weight for combustion of methane with theoretical quantity of air will be about
Air/fuel ratio by weight for combustion of methane with theoretical quantity of air will be about
Eutectoid reaction for iron-carbon system occurs at a temperature of __________ °C.
Eutectoid reaction for iron-carbon system occurs at a temperature of __________ °C.
Nusselt number is related to Grashoff number (Gr) in turbulent & laminar flow respectively, in respect of free convection over a vertical flat plate as
Nusselt number is related to Grashoff number (Gr) in turbulent & laminar flow respectively, in respect of free convection over a vertical flat plate as
Powder metallurgy is used to produce
Powder metallurgy is used to produce
Scaling occurs in boiler tubes due to the fact that, the solubility of Ca(OH)₂ __________ with increasing temperature.
Scaling occurs in boiler tubes due to the fact that, the solubility of Ca(OH)₂ __________ with increasing temperature.
Which one is neutral in character ?
Which one is neutral in character ?
High speed steel tools retain their hardness upto a temperature of __________ °C.
High speed steel tools retain their hardness upto a temperature of __________ °C.
Silicon crystal can be converted to p-type semi-conductor by doping with
Silicon crystal can be converted to p-type semi-conductor by doping with
For hardening high alloy steel, it is to be heated slowly and uniformly to avoid
For hardening high alloy steel, it is to be heated slowly and uniformly to avoid
On decreasing the grain size of a polycrys-talline material, the property most likely to deteriorate is
On decreasing the grain size of a polycrys-talline material, the property most likely to deteriorate is
Materials used for making permanent magnets containing iron and nickel are made by __________ technique.
Materials used for making permanent magnets containing iron and nickel are made by __________ technique.
There are one octahedral void and __________ tetrahedral void in the closest packing of atoms.
There are one octahedral void and __________ tetrahedral void in the closest packing of atoms.
Super conduction in metals is observed at a temperature of __________ °K.
Super conduction in metals is observed at a temperature of __________ °K.
The main function of the deaerator used in the thermal power plant is to
The main function of the deaerator used in the thermal power plant is to
__________ can replace tungsten in high speed steel.
__________ can replace tungsten in high speed steel.
Notched bar test is used for testing the __________ of a material.
Notched bar test is used for testing the __________ of a material.
Ultimate strength in tension as compared to that in shear for steel is
Ultimate strength in tension as compared to that in shear for steel is
The most detrimental impurity in high pressure boiler feed water is
The most detrimental impurity in high pressure boiler feed water is
The velocity at which individual particles from a fluidised bed are carried away by the fluid passing through it, is defined as the
The velocity at which individual particles from a fluidised bed are carried away by the fluid passing through it, is defined as the
__________ is the most important element, which controls the physical properties of steel.
__________ is the most important element, which controls the physical properties of steel.
Air standard Otto cycle is more efficient than the diesel cycle for the same
Air standard Otto cycle is more efficient than the diesel cycle for the same
Source of heat supply in a cupola is
Source of heat supply in a cupola is
Friction factor for fluid flow in pipe does not depend upon the
Friction factor for fluid flow in pipe does not depend upon the
Boiler draught of 10 mm water column is equivalent to
Boiler draught of 10 mm water column is equivalent to
__________ of air does not increase with increase in temperature.
__________ of air does not increase with increase in temperature.
The approximate height of a blast furnace having a useful volume of 2000 m³ is about __________ metres
The approximate height of a blast furnace having a useful volume of 2000 m³ is about __________ metres
__________ is not a heat treatment process.
__________ is not a heat treatment process.
A polymer is termed as an 'elastomer', if its percentage elongation is more than 100%. An elastomer is termed as 'rubber' if its percentage elongation is more than __________ percent.
A polymer is termed as an 'elastomer', if its percentage elongation is more than 100%. An elastomer is termed as 'rubber' if its percentage elongation is more than __________ percent.
The basic function of the drum in a boiler is to
The basic function of the drum in a boiler is to
Pipelines carrying various utilities in chemical industries are identified by their colour codes. The color of pipeline carrying steam is
Pipelines carrying various utilities in chemical industries are identified by their colour codes. The color of pipeline carrying steam is
Out of the following, which will fracture most readity, when hit with a hard hammer ?
Out of the following, which will fracture most readity, when hit with a hard hammer ?
Electrolytic reduction cell used for conversion of calcined Al2O₃ to Al is a carbon lined furnace operating at 800-900 °C. The purpose of electric current supplied to the furnace is to
Electrolytic reduction cell used for conversion of calcined Al2O₃ to Al is a carbon lined furnace operating at 800-900 °C. The purpose of electric current supplied to the furnace is to
Load cells used for the measurement of weight has
Load cells used for the measurement of weight has
Lime contains about 90% CaO. Percentage CaO present in limestone is about
Lime contains about 90% CaO. Percentage CaO present in limestone is about
Which of the following materials has the maximum shrinkage allowance ?
Which of the following materials has the maximum shrinkage allowance ?
Stretcher strains found in a low carbon sheet are associated with the
Stretcher strains found in a low carbon sheet are associated with the
Pick out the wrong statement.
Pick out the wrong statement.
Sub zero treatment of steel is done to
Sub zero treatment of steel is done to
Which of the following metals is the most prone to work hardening?
Which of the following metals is the most prone to work hardening?
Limestone addition in the blast furnace is done to flux __________ present in the raw materials.
Limestone addition in the blast furnace is done to flux __________ present in the raw materials.
A suitable lubricant used for watches is
A suitable lubricant used for watches is
Shaft/rotor speed is most accurately measured by a
Shaft/rotor speed is most accurately measured by a
Compression ratio of an I.C. engine is the ratio of the
Compression ratio of an I.C. engine is the ratio of the
With increase in temperature, the surface tension of water
With increase in temperature, the surface tension of water
The ratio of thermal & electrical conductivity is same for all the metals at the same temperature ; and at around room temperature, this ratio is proportional to(where, T = absolute temperature, °K)
The ratio of thermal & electrical conductivity is same for all the metals at the same temperature ; and at around room temperature, this ratio is proportional to(where, T = absolute temperature, °K)
Austempering of steel requires.it to be heated to 875°C followed by sudden cooling to 250-525°C, thereby changing austenite to
Austempering of steel requires.it to be heated to 875°C followed by sudden cooling to 250-525°C, thereby changing austenite to
The heat treatment to which the steel wire containing > 0.25% carbon is subjected to is
The heat treatment to which the steel wire containing > 0.25% carbon is subjected to is
Specific __________ is a dimensionless quantity.
Specific __________ is a dimensionless quantity.
Parallel straight line pattern of temperature distribution for both hot and cold fluids is observed in case of heat exchanger of the type
Parallel straight line pattern of temperature distribution for both hot and cold fluids is observed in case of heat exchanger of the type
To improve the machinability of steel by its softening, it is subjected to
To improve the machinability of steel by its softening, it is subjected to
Which of the following metals reacts violently with water ?
Which of the following metals reacts violently with water ?
Two wires of the same radius & material having length in the ratio of 1 : 2 are stretched by the same force. The strain produced in the two wires will be in the ratio of
Two wires of the same radius & material having length in the ratio of 1 : 2 are stretched by the same force. The strain produced in the two wires will be in the ratio of
Out of the following, the most ductile material is
Out of the following, the most ductile material is
Consideration of the creep is the most important in case of the
Consideration of the creep is the most important in case of the
Factor of safety is the ratio of the __________ stress to the working stress.
Factor of safety is the ratio of the __________ stress to the working stress.
Rain drops falling through atmospheric air attain limited terminal velocity, because of
Rain drops falling through atmospheric air attain limited terminal velocity, because of
A compact estimate about the amount of materials handling between various work stations is obtained from the
A compact estimate about the amount of materials handling between various work stations is obtained from the
In age-hardenable alloys, maximum ductility is obtained
In age-hardenable alloys, maximum ductility is obtained
Protection of ship hulls against sea water corrosion is done by coating with zinc because of the fact that zinc compared to iron is
Protection of ship hulls against sea water corrosion is done by coating with zinc because of the fact that zinc compared to iron is
Oxyacetylene reducing flame is used while carrying out welding on
Oxyacetylene reducing flame is used while carrying out welding on
Pick the odd man out of the following.
Pick the odd man out of the following.
Unit of viscosity in CGS system is
Unit of viscosity in CGS system is
Which of the following heat treatment processes is usually applied to castings ?
Which of the following heat treatment processes is usually applied to castings ?
Out of the following, the lowest packing of atoms exists in __________ crystal lattice structure.
Out of the following, the lowest packing of atoms exists in __________ crystal lattice structure.
Presence of small quantity of sulphur in low carbon steel improves its
Presence of small quantity of sulphur in low carbon steel improves its
Transition from laminar flow to turbulent flow in fluid flow through a pipe does not depend upon the
Transition from laminar flow to turbulent flow in fluid flow through a pipe does not depend upon the
Nusselt number is related to the Reynolds number (Re) in turbulent & laminar flow respectively as
Nusselt number is related to the Reynolds number (Re) in turbulent & laminar flow respectively as
__________ of hard alloy and tool steel is done to make it easily machinable.
__________ of hard alloy and tool steel is done to make it easily machinable.
Oxyacetylene reducing flame is used while carrying out welding on
Oxyacetylene reducing flame is used while carrying out welding on
Creep consideration is the most important in case of the
Creep consideration is the most important in case of the
Two solutions A₁ & A₂ have pH value of 2 & 6 respectively. It implies that the solution
Two solutions A₁ & A₂ have pH value of 2 & 6 respectively. It implies that the solution
Which of the following is an example of cathodic protection of metals against corrosion ?
Which of the following is an example of cathodic protection of metals against corrosion ?
During sensible heating of humid air
During sensible heating of humid air
A cylinderical rod subjected to a tensile strain within the elastic limit undergoes a volume change. If the volume strain is equal to half the tensile strain, then the Poisson's ratio of the rod is
A cylinderical rod subjected to a tensile strain within the elastic limit undergoes a volume change. If the volume strain is equal to half the tensile strain, then the Poisson's ratio of the rod is
__________ joint is usually used for joining cast iron pipes mostly used for temporary pipelines, where it may be necessary to dismantle & reassemble the pipeline very frequently.
__________ joint is usually used for joining cast iron pipes mostly used for temporary pipelines, where it may be necessary to dismantle & reassemble the pipeline very frequently.
Eutectic reaction for iron-carbon system occurs at a temperature of __________ °C.
Eutectic reaction for iron-carbon system occurs at a temperature of __________ °C.
Buoyancy force depends on the __________ the liquid.
Buoyancy force depends on the __________ the liquid.
A jig is used while __________ a hole.
A jig is used while __________ a hole.
The most important consideration, while designing the refrigeration system of an aircraft is that the refrigeration system
The most important consideration, while designing the refrigeration system of an aircraft is that the refrigeration system
At the point of boundary layer separation in fluid flow, the
At the point of boundary layer separation in fluid flow, the
'Flare tower' used in industry is meant for
'Flare tower' used in industry is meant for
What is the value of included angle of a triangular notch for maximum discharge ?
What is the value of included angle of a triangular notch for maximum discharge ?
In radiative heat transfer, a grey surface is the one, which has
In radiative heat transfer, a grey surface is the one, which has
