The percentage of carbon in grey iron castings usually varies between
The percentage of carbon in grey iron castings usually varies between
Basic solution is one which has pH value
Basic solution is one which has pH value
Grey cast iron
Grey cast iron
When a steel containing __________ 0.8% carbon is cooled slowly below the lower critical point, it consists of ferrite and pearlite.
When a steel containing __________ 0.8% carbon is cooled slowly below the lower critical point, it consists of ferrite and pearlite.
Iron ore is usually found in the form of
Iron ore is usually found in the form of
Dislocations in materials refer to the following type of defect
Dislocations in materials refer to the following type of defect
The hardness is the property of a material due to which it
The hardness is the property of a material due to which it
Delta-iron occurs between the temperature ranges of
Delta-iron occurs between the temperature ranges of
Maximum percentage of carbon in austenite is
Maximum percentage of carbon in austenite is
Constantan an alloy used in thermocouples is an alloy of
Constantan an alloy used in thermocouples is an alloy of
Smelting is the process of
Smelting is the process of
Tensile strength of steel can be safely increased by
Tensile strength of steel can be safely increased by
Inconel contains
Inconel contains
Addition of silicon to aluminium results in
Addition of silicon to aluminium results in
There are fourteen atoms in a unit cell of
There are fourteen atoms in a unit cell of
Induction hardening is basically a
Induction hardening is basically a
Dye penetrant method is generally used to locate
Dye penetrant method is generally used to locate
Neutral solution is one which has pH value
Neutral solution is one which has pH value
Lead is poured into the joint between two pipes. These pipes may be made of
Lead is poured into the joint between two pipes. These pipes may be made of
The percentage carbon content in wrought iron is about
The percentage carbon content in wrought iron is about
The alloying element which can replace tungsten in high speed steels is
The alloying element which can replace tungsten in high speed steels is
In nodular iron, graphite is in the form of
In nodular iron, graphite is in the form of
The ratio of the volume occupied by the atoms to the total volume of the unit cell is called
The ratio of the volume occupied by the atoms to the total volume of the unit cell is called
In spheroidising process, the steel is
In spheroidising process, the steel is
Corundum contains more than 95%
Corundum contains more than 95%
In malleable iron, carbon is present in the form of
In malleable iron, carbon is present in the form of
Beryllium bronze contains
Beryllium bronze contains
Which of the following metal is used in making electrical resistance wire for electric furnaces and heating elements?
Which of the following metal is used in making electrical resistance wire for electric furnaces and heating elements?
Bell metal contains
Bell metal contains
Age hardening is related to
Age hardening is related to
The material in which the atoms are arranged chaotically, is called
The material in which the atoms are arranged chaotically, is called
Which of the following represents the allotropic forms of iron?
Which of the following represents the allotropic forms of iron?
The lower critical point for all steels is
The lower critical point for all steels is
Steel with __________ carbon is known as hypo-eutectoid steel.
Steel with __________ carbon is known as hypo-eutectoid steel.
Mild steel belongs to the following category
Mild steel belongs to the following category
Cupola produces following material
Cupola produces following material
Which of the following element results in presence of free graphite in C.I.?
Which of the following element results in presence of free graphite in C.I.?
Stress relaxation is the phenomenon
Stress relaxation is the phenomenon
The machinability of steel is increased by
The machinability of steel is increased by
The toughness of a material __________ when it is heated.
The toughness of a material __________ when it is heated.
Basic constituents of Monel metal are
Basic constituents of Monel metal are
The aluminium alloy, mainly used, for anodized utensil manufacture, is
The aluminium alloy, mainly used, for anodized utensil manufacture, is
Which of the following property is desirable for materials used in tools and machines?
Which of the following property is desirable for materials used in tools and machines?
When elements like nickel, chromium, copper and molybdenum are added to the molten cast iron, it produces
When elements like nickel, chromium, copper and molybdenum are added to the molten cast iron, it produces
The machinability of steel is improved by adding
The machinability of steel is improved by adding
Age-hardening is related with
Age-hardening is related with
The hardness and tensile strength in austenitic stainless steel can be increased by
The hardness and tensile strength in austenitic stainless steel can be increased by
Addition of lead and bismuth to aluminium results in
Addition of lead and bismuth to aluminium results in
The blade of a power saw is made of
The blade of a power saw is made of
Gamma-iron occurs between the temperature ranges of
Gamma-iron occurs between the temperature ranges of
Malleable cast iron
Malleable cast iron
The ultimate tensile strength and yield strength of most of the metals, when temperature falls from 0 to 100°C will
The ultimate tensile strength and yield strength of most of the metals, when temperature falls from 0 to 100°C will
The presence of hydrogen in steel causes
The presence of hydrogen in steel causes
Which is false statement about properties of aluminium?
Which is false statement about properties of aluminium?
White cast iron has
White cast iron has
Vanadium in high speed steels
Vanadium in high speed steels
The property of a material which enables it to retain the deformation permanently, is called
The property of a material which enables it to retain the deformation permanently, is called
The main alloying elements high speed steel in order of increasing proportion are
The main alloying elements high speed steel in order of increasing proportion are
Silicon when added to copper improves
Silicon when added to copper improves
Combined carbon in iron makes the metal
Combined carbon in iron makes the metal
Machining properties of steel are improved by adding
Machining properties of steel are improved by adding
Tungsten when added to steel __________ the critical temperature.
Tungsten when added to steel __________ the critical temperature.
In mottled cast iron, carbon is available in
In mottled cast iron, carbon is available in
Taps dies and drills contain carbon
Taps dies and drills contain carbon
Isotropic materials are those which have the same
Isotropic materials are those which have the same
An engineer's hammer is made of
An engineer's hammer is made of
The heat treatment process used for softening hardened steel is
The heat treatment process used for softening hardened steel is
Aluminium bronze contains
Aluminium bronze contains
The presence of sulphur in pig iron makes
The presence of sulphur in pig iron makes
Cartridge brass can be
Cartridge brass can be
Addition of manganese to aluminium results in
Addition of manganese to aluminium results in
The addition of which of the following improves machining of copper?
The addition of which of the following improves machining of copper?
Which is false statement about normalizing? Normalizing is done to
Which is false statement about normalizing? Normalizing is done to
Nodular iron has
Nodular iron has
Chilled cast iron has
Chilled cast iron has
Which of the following impurity in cast iron makes it hard and brittle?
Which of the following impurity in cast iron makes it hard and brittle?
German silver is an alloy of
German silver is an alloy of
German silver contains
German silver contains
Nickel when added to copper improves
Nickel when added to copper improves
Cyaniding is the process of
Cyaniding is the process of
The brown smoke during the operation of a Bessemer converter indicates that the
The brown smoke during the operation of a Bessemer converter indicates that the
Drop forging dies contain carbon of the order of
Drop forging dies contain carbon of the order of
Acidic solution is one which has pH value
Acidic solution is one which has pH value
The usual composition of a soldering alloy is
The usual composition of a soldering alloy is
Induction hardening is the process of
Induction hardening is the process of
Which of the following is not the correct method of increasing fatigue limit?
Which of the following is not the correct method of increasing fatigue limit?
For a steel containing 0.8% carbon
For a steel containing 0.8% carbon
The material widely used for making pendulums of clocks is
The material widely used for making pendulums of clocks is
The metal suitable for bearings subjected to heavy loads, is
The metal suitable for bearings subjected to heavy loads, is
The metal suitable for bearings subjected to light loads, is
The metal suitable for bearings subjected to light loads, is
Nickel in steel
Nickel in steel
Nodular cast iron is produced by adding ________ to the molten cast iron.
Nodular cast iron is produced by adding ________ to the molten cast iron.
In the lower part of the blast furnace (zone of fusion), the temperature is
In the lower part of the blast furnace (zone of fusion), the temperature is
For the allotropic forms of iron, the points of arrest are
For the allotropic forms of iron, the points of arrest are
Free carbon in iron makes the metal
Free carbon in iron makes the metal
Solder is an alloy consisting of
Solder is an alloy consisting of
The hardness of steel primarily depends on
The hardness of steel primarily depends on
Addition of copper to aluminium results in
Addition of copper to aluminium results in
The hardness of steel increases if it contains
The hardness of steel increases if it contains
