Steel will respond to hardening by heat treatment processes, only when the minimum carbon content in it is __________ percent.
Steel will respond to hardening by heat treatment processes, only when the minimum carbon content in it is __________ percent.
Dies for wire drawing are generally made of
Dies for wire drawing are generally made of
Brine (15% concentration) can be stored in a vessel made of
Brine (15% concentration) can be stored in a vessel made of
The main purpose of galvanising iron sheets is to
The main purpose of galvanising iron sheets is to
__________ is a donor impurity for semi-conductors.
__________ is a donor impurity for semi-conductors.
18/8 stainless steel means, that it contains
18/8 stainless steel means, that it contains
Lead pipes are not safe for carraying drinking water, because water, containing dissolved oxygen attacks lead thereby forming poisonous Pb(OH)₂. Lead pipes are readily corroded by
Lead pipes are not safe for carraying drinking water, because water, containing dissolved oxygen attacks lead thereby forming poisonous Pb(OH)₂. Lead pipes are readily corroded by
Alpha iron is stable __________ °C.
Alpha iron is stable __________ °C.
High resistance electrical heating elements/wire are not made of
High resistance electrical heating elements/wire are not made of
Babbit metal (used for making bearings) comprises of
Babbit metal (used for making bearings) comprises of
Nickel and copper are the basic constituents of
Nickel and copper are the basic constituents of
Iron alloyed with carbon upto 2% is called
Iron alloyed with carbon upto 2% is called
Pipes for bi-cycle frames are made of __________ steel.
Pipes for bi-cycle frames are made of __________ steel.
Which of the following is the most widely used insulating material for steam carray-ing pipelines?
Which of the following is the most widely used insulating material for steam carray-ing pipelines?
__________ can replace tungsten in high speed steel,
__________ can replace tungsten in high speed steel,
Maximum consumption of lead is in the manufacture of
Maximum consumption of lead is in the manufacture of
Tubes of multiple effect evaporator used for concentration of sugar cane juice are made of
Tubes of multiple effect evaporator used for concentration of sugar cane juice are made of
Austenitic manganese steel used for making jaws of crushing machines contains about __________ percent manganese.
Austenitic manganese steel used for making jaws of crushing machines contains about __________ percent manganese.
Ball bearings are normally made of __________ steel.
Ball bearings are normally made of __________ steel.
Nickel base alloys with __________ are known as monel metal.
Nickel base alloys with __________ are known as monel metal.
A suitable material of construction to use with fuming sulphuric acid is
A suitable material of construction to use with fuming sulphuric acid is
High speed steel tools retain their hardness upto a temperature of __________ °C.
High speed steel tools retain their hardness upto a temperature of __________ °C.
Which of the following is not an alloy of nickel and chromium?
Which of the following is not an alloy of nickel and chromium?
In drop forging process, the forging is done by dropping the __________ at high velocity.
In drop forging process, the forging is done by dropping the __________ at high velocity.
A metallic alloy in which one of the constituent metal is __________ , is called an amalgam.
A metallic alloy in which one of the constituent metal is __________ , is called an amalgam.
To improve the machinability of steel, it is generally subjected to
To improve the machinability of steel, it is generally subjected to
Which of the following is universally employed as the low expansion metal in the bimetallic thermometer, which is an iron-nickel alloy containing 36% nickel and has very low co-efficient of expansion (l/20th of ordinary metals)?
Which of the following is universally employed as the low expansion metal in the bimetallic thermometer, which is an iron-nickel alloy containing 36% nickel and has very low co-efficient of expansion (l/20th of ordinary metals)?
Sulphuric acid pickling tanks are lined with
Sulphuric acid pickling tanks are lined with
The chlorinator used in the manufacture of DDT is made of
The chlorinator used in the manufacture of DDT is made of
__________ iron is produced, when molten pig iron is allowed to cool gradually.
__________ iron is produced, when molten pig iron is allowed to cool gradually.
Brine solution is stored/treated in __________ lined vessels/pipes.
Brine solution is stored/treated in __________ lined vessels/pipes.
Steel balls for ball bearings are generally made of __________ steel.
Steel balls for ball bearings are generally made of __________ steel.
The material used in the filament of electric bulbs is
The material used in the filament of electric bulbs is
The softest material just next to talc in the Mho's scale is
The softest material just next to talc in the Mho's scale is
Zinc is highly __________ at room temperature.
Zinc is highly __________ at room temperature.
High speed cutting tool steels contain about __________ percent of tungsten.
High speed cutting tool steels contain about __________ percent of tungsten.
Chrome vanadium steels usually contain 0.8 to 1.1% Cr, 0.25 to 0.35% C and < 0.25% V. It is
Chrome vanadium steels usually contain 0.8 to 1.1% Cr, 0.25 to 0.35% C and < 0.25% V. It is
Pick the odd man out of the following.
Pick the odd man out of the following.
Copper is dissolved from its ore by H₂SO₄ in a percolation tank made of
Copper is dissolved from its ore by H₂SO₄ in a percolation tank made of
Liners of a ball mill are never made of
Liners of a ball mill are never made of
Glass lined vessels are not used for handling/storing
Glass lined vessels are not used for handling/storing
In SO₃ absorber (Contact Process), packing material used is of
In SO₃ absorber (Contact Process), packing material used is of
The process of heating the cold pressed metallic powder is called __________ in powder metallurgy.
The process of heating the cold pressed metallic powder is called __________ in powder metallurgy.
18-4-1 high speed steel contains 18%, 4% and 1% respectively of
18-4-1 high speed steel contains 18%, 4% and 1% respectively of
Most of the common metals have __________ crystal structure.
Most of the common metals have __________ crystal structure.
The heat treatment process applied to cold formed steel parts is
The heat treatment process applied to cold formed steel parts is
__________ is not a case hardening process.
__________ is not a case hardening process.
SO₃ is absorbed using H₂SO₄ in a
SO₃ is absorbed using H₂SO₄ in a
__________ iron is produced, when molten pig iron is chilled suddenly.
__________ iron is produced, when molten pig iron is chilled suddenly.
Which of the following metals in not used for coating of the base metal to guard it against corrosion?
Which of the following metals in not used for coating of the base metal to guard it against corrosion?
Failure of a material is termed as fatigue failure, if it fails below the yield point. The resistance to fatigue failure of a material is measured by the
Failure of a material is termed as fatigue failure, if it fails below the yield point. The resistance to fatigue failure of a material is measured by the
Presence of even very minute amount (say 0.1%) of __________ in copper, reduces its electrical conductivity very seriously.
Presence of even very minute amount (say 0.1%) of __________ in copper, reduces its electrical conductivity very seriously.
Percentage elongation of a material is a measure of its
Percentage elongation of a material is a measure of its
Lead pipes are not safe for carrying drinking water because water containing dissolved oxygen attacks lead thereby forming poisonous Pb (OH)2. Lead pipes are readily corroded by
Lead pipes are not safe for carrying drinking water because water containing dissolved oxygen attacks lead thereby forming poisonous Pb (OH)2. Lead pipes are readily corroded by
The material of construction of pressure mills used for squeezing out the juice from sugar cane is
The material of construction of pressure mills used for squeezing out the juice from sugar cane is
For handling sulphuric acid of 95% strength, the suitable material of construction for pipes is
For handling sulphuric acid of 95% strength, the suitable material of construction for pipes is
Gunmetal and bronze are not corroded by the action of
Gunmetal and bronze are not corroded by the action of
Presence of high amount of silicon in cast iron
Presence of high amount of silicon in cast iron
Which of the following constituents of cast iron is mainly responsible for imparting it an anti-corrosive property?
Which of the following constituents of cast iron is mainly responsible for imparting it an anti-corrosive property?
Percentage of silver in German silver is
Percentage of silver in German silver is
The high expansion metal normally used in the bimetallic thermometer is __________ temperature measurement.
The high expansion metal normally used in the bimetallic thermometer is __________ temperature measurement.
The addition of antimony in tin-based alloys improves its
The addition of antimony in tin-based alloys improves its
The increase in hardness of metal due to its cold working is termed as the __________ hardening.
The increase in hardness of metal due to its cold working is termed as the __________ hardening.
A bearing metal should not have
A bearing metal should not have
The most distinguished property of malleable cast iron is its high
The most distinguished property of malleable cast iron is its high
Invar contains the highest percentage of
Invar contains the highest percentage of
Clock pendulums are usually made of __________ steel.
Clock pendulums are usually made of __________ steel.
Thermometer bulb & capillary in case of mercury filled pressure spring expansion thermometer is normally made of __________ as mercury does not amalgamate with it.
Thermometer bulb & capillary in case of mercury filled pressure spring expansion thermometer is normally made of __________ as mercury does not amalgamate with it.
18/8 steel is a/an __________ stainless steel.
18/8 steel is a/an __________ stainless steel.
Brinell Hardness Number (BHN) for talc is approximately in the range of
Brinell Hardness Number (BHN) for talc is approximately in the range of
Gas holder of a gobar (cowdung) gas plant is made of
Gas holder of a gobar (cowdung) gas plant is made of
Coke oven walls are lined with __________ bricks.
Coke oven walls are lined with __________ bricks.
Nickel as a material of construction
Nickel as a material of construction
Balls in a ball mill are usually made of
Balls in a ball mill are usually made of
Steel tower used for the storage of oleum
Steel tower used for the storage of oleum
Hydrochloric acid is __________ corrosive to common metals.
Hydrochloric acid is __________ corrosive to common metals.
Which of the following has the least carbon percentage?
Which of the following has the least carbon percentage?
Fermenter used in the production of pen-cillin by deep fermentation proces is a __________ lined steel vessel
Fermenter used in the production of pen-cillin by deep fermentation proces is a __________ lined steel vessel
Addition of nickel to copper improves its
Addition of nickel to copper improves its
Steel pipes are normally manufactured by __________ process.
Steel pipes are normally manufactured by __________ process.
Concentrated HCl at 30°C can be stored in a vessel made of
Concentrated HCl at 30°C can be stored in a vessel made of
Acid proof stoneware
Acid proof stoneware
Rubber lined vessels are corroded by the action of
Rubber lined vessels are corroded by the action of
Which of the following is produced by condensation polymerisation?
Which of the following is produced by condensation polymerisation?
Which of the following undergoes granular fracture?
Which of the following undergoes granular fracture?
An alloy used as thermocouple material comprises of 40% nickel and 60% copper. It is called
An alloy used as thermocouple material comprises of 40% nickel and 60% copper. It is called
Which of the following alloy steels has the energy saving properties making it suitable for use in electrical machines?
Which of the following alloy steels has the energy saving properties making it suitable for use in electrical machines?
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
Lead alone is not used in storing equipment, because it
Lead alone is not used in storing equipment, because it
Hydrochloric acid is stored in a __________ steel vessel.
Hydrochloric acid is stored in a __________ steel vessel.
Common house hold glass (i.e., soda-lime glass) is a/an __________ material.
Common house hold glass (i.e., soda-lime glass) is a/an __________ material.
Carbon percentage in medium carbon steel is around
Carbon percentage in medium carbon steel is around
A magnetic material becomes __________ above the Curie temperature.
A magnetic material becomes __________ above the Curie temperature.
In hot wire aneomometer used for gas flow measurement, the wire is normally made of
In hot wire aneomometer used for gas flow measurement, the wire is normally made of
White cast iron as compared to grey cast iron is
White cast iron as compared to grey cast iron is
Which of the following is not a nickel based alloy?
Which of the following is not a nickel based alloy?
Approximate value of the modulus of elasticity for steel is about __________ x l0⁶kg/cm².
Approximate value of the modulus of elasticity for steel is about __________ x l0⁶kg/cm².
How many molecules per unit cell are there in a face centred cubic lettice?
How many molecules per unit cell are there in a face centred cubic lettice?
Nickel and molybdenum are the basic constituents of
Nickel and molybdenum are the basic constituents of
Presence of even 0.005% of __________ in copper makes it highly brittle, rendering it useless for wire-drawing.
Presence of even 0.005% of __________ in copper makes it highly brittle, rendering it useless for wire-drawing.
