Engineering Materials

Recrystallization temperature can be lowered by

Ductility of a material can be defined as

Malleability of a material can be defined as

The ability of a material to absorb energy in the plastic range is called

Muntz metal contains copper and zinc in the ratio of

Bronze alloy contains

Which of the following statement is true about brittle fracture?

Brass contains

Pick up wrong statement about wrought iron

Maximum percentage of carbon in ferrite is

The electric process of steel making is especially adapted to

Chromium in steel

A cold chisel is made of

Cast iron is characterized by minimum of following percentage of carbon

Eutectoid steel contains following percentage of carbon

Cast iron is a

Cast iron has

Carbon steel is

High carbon steel carries carbon percentage

According to Indian standard specifications, plain carbon steel designated by 40 C8 means that the carbon content is

Iron ore is usually found in the form of

German silver contains

Drop forging dies contain carbon of the order of

Combined carbon in iron makes the metal

Free carbon in iron makes the metal

In mottled cast iron, carbon is available in

The presence of hydrogen in steel causes

Maximum percentage of carbon in austenite is

The hardness and tensile strength in austenitic stainless steel can be increased by

Machining properties of steel are improved by adding

Super conduction by metals is observed in the temperature range of

Ferromagnetic alpha iron exists in temperature range of

Gamma iron exits at following temperature

Dow metal contains

The material in which the atoms are arranged regularly in some directions but not in others, is called

The property of a material due to which it breaks with little permanent distortion, is called

Which of the following is an amorphous material?

Which of the following is used for bearing liner?

White cast iron contains carbon in the form of

Weld decay is the phenomenon found with

The following types of materials are usually the most ductile

Nimonic contains __________ percentage of nickel as that of Inconel.

Which one of the following metals would work-harden more quickly than the others?

Sulphur in pig iron tends to make it

In low carbon steels, presence of small quantities of sulphur improves

The ultimate tensile strength of low carbon steel by working at a high strain rate will

Normalising of steel is done to

Hardness of steel depends on

The coordination number of a face centered cubic space lattice is

The composition of silver solder is

The portion of the blast furnace below its widest cross-section is called

The silicon steel is widely used for

Connecting rod is usually made of

Blast furnace is used to produce

Compressive strength of grey cast iron in tonnes/cm is of the order of

Y-alloy contains

Wrought iron

White cast iron

When the steel is normalized, its

Amorphous material is one

The percentage of carbon in grey iron castings usually varies between

Dye penetrant method is generally used to locate

The material widely used for making pendulums of clocks is

Taps dies and drills contain carbon

Solder is an alloy consisting of

Malleable cast iron

Bell metal contains

Which is false statement about normalizing? Normalizing is done to

Chilled cast iron has

The aluminium alloy, mainly used, for anodized utensil manufacture, is

Bronze is an alloy of

Manganese is added in low carbon steel to

The elastic stress strain behavior of rubber is

The following element can't impart high strength at elevated temperature

In process annealing, the hypo eutectoid steel is

In a hardening process, the hypo-eutectoid steel is

The temperature required for full annealing in hypereutectoid steel is

Duralumin contains

Admiralty gun metal contains

In grey cast iron, carbon is present in the form of

In malleable iron, carbon is present in the form of

Nodular iron has

Nickel in steel

Dislocations in materials refer to the following type of defect

The main alloying elements high speed steel in order of increasing proportion are

Induction hardening is basically a

Which of the following is not the correct method of increasing fatigue limit?

The property of a material which enables it to retain the deformation permanently, is called

The brown smoke during the operation of a Bessemer converter indicates that the

The charge of the blast furnace consists of

Pearlite consists of

Balls for ball bearings are made of

The property of a material essential for spring materials is

Grey cast iron has

In which of the following cases, consideration of creep is important

Iron-carbon alloys containing 1.7 to 4.3% carbon are known as

Pipes for bicycle frames are made of

Which of the following metal is used for nuclear energy?

Aluminium bronze contains aluminium and copper in the ratio of

When elements like nickel, chromium, copper and molybdenum are added to the molten cast iron, it produces

Iron is

Corundum contains more than 95%

For a steel containing 0.8% carbon

Age hardening is related to

Inconel contains

The presence of sulphur in pig iron makes

There are fourteen atoms in a unit cell of

Which is false statement about properties of aluminium?

Cartridge brass can be

Which of the following is the binding material in cemented carbides?

Monel metal contains

Inconel is an alloy of

The alloying element which increases residual magnetism and coercive magnetic force in steel for magnets is

Manganese in steel increases its

Free cutting steels

The cupola is used to manufacture

Tungsten in high speed steel provides

1841 high speed steel contains

The machinability of steel is improved by adding

Nodular cast iron is produced by adding ________ to the molten cast iron.

Addition of manganese to aluminium results in

Addition of copper to aluminium results in

Addition of lead and bismuth to aluminium results in

Addition of silicon to aluminium results in

The hardness of steel primarily depends on

Beryllium bronze contains

Aluminium bronze contains

The ultimate tensile strength and yield strength of most of the metals, when temperature falls from 0 to 100°C will

The blade of a power saw is made of

German silver is an alloy of

Specify the sequence correctly

Cementite consist of

Preheating is essential in welding

Which of the following material has nearly zero coefficient of expansion?

When filing or machining cast iron makes our hands black, then it shows that ________ is present in cast iron.

When medium carbon steel is heated to coarsening temperature

Which of the following when used in ordinary low carbon steels, makes the metal ductile and of good bending qualities?

Recrystallization temperature is one

The lower critical point for all steels is

Tensile strength of steel can be safely increased by

Basic constituents of Monel metal are

Steel with __________ carbon is known as hypo-eutectoid steel.

In spheroidising process, the steel is

Lead is poured into the joint between two pipes. These pipes may be made of

Constantan an alloy used in thermocouples is an alloy of

The hardness of steel increases if it contains

Gamma-iron occurs between the temperature ranges of

Delta-iron occurs between the temperature ranges of

Cast iron is manufactured in

The molecules in a solid move

Hardness of upper bainite (acicular structure) is about

A reversible change in the atomic structure of the steel with a corresponding change in the properties is known as

A reversible change in the atomic structure of steel with corresponding change in the properties is known as

Hardness of martensite is about

A coarse grained steel

Which of the following pipes is least corrosion resistant?

Points of arrest for iron correspond to

The charge is fed into the blast furnace through the

Isotropic materials are those which have the same

The material in which the atoms are arranged chaotically, is called

Tungsten when added to steel __________ the critical temperature.

Which of the following represents the allotropic forms of iron?

The addition of which of the following improves machining of copper?

Vanadium in high speed steels

Basic solution is one which has pH value

Neutral solution is one which has pH value

Acidic solution is one which has pH value

The toughness of a material __________ when it is heated.

Which of the following metal is used in making electrical resistance wire for electric furnaces and heating elements?

In the lower part of the blast furnace (zone of fusion), the temperature is

Which of the following impurity in cast iron makes it hard and brittle?

An engineer's hammer is made of

The alloying element which can replace tungsten in high speed steels is

Grey cast iron

Which of the following element results in presence of free graphite in C.I.?

The percentage carbon content in wrought iron is about

Age-hardening is related with

A specimen of aluminium metal when observed under microscope shows

The correct sequence for descending order of machinability is

The ability of a material to resist fracture due to high impact loads, is called

Brass (alloy of copper and zinc) is an example of

Carbon in iron is an example of

An alloy steel which is work hardenable and which is used to make the blades of bulldozers, bucket wheel excavators and other earth moving equipment contain iron, carbon and

The percentage of carbon in pig iron varies from

The carbon in the pig iron varies from

The percentage of carbon in cast iron varies from

An important property of high silicon (12 - 18%) cast iron is the high

Which of the following material has maximum ductility?

The ability of a material to resist softening at high temperature is known as

The defect which takes place due to imperfect packing of atoms during crystallization is known as

The alloy used for making electrical resistances and heating elements is

The strength is the ability of a material to resist

The stiffness is the ability of a material to resist

Which of the following statement is wrong?

Delta iron occurs at temperature of

Which of the following elements does not impart hardness to steel?

The steel widely used for motor car crankshafts is

Corrosion resistance of steel is increased by addition of

By severely deforming a metal in a particular direction it becomes

Iron-carbon alloys containing carbon ________ 4.3% are known as hyper-eutectic cast irons.

Which of the following statements are true for annealing of steels?

Which is false statement about annealing? Annealing is done to

Eutectoid reaction occurs at

When steel containing less than 0.8% carbon is cooled slowly from temperatures above or within the critical range, it consists of

Pick up the wrong statement

The machinability of steel is increased by

The hardness is the property of a material due to which it

White cast iron has

When a steel containing __________ 0.8% carbon is cooled slowly below the lower critical point, it consists of ferrite and pearlite.

The ratio of the volume occupied by the atoms to the total volume of the unit cell is called

Smelting is the process of

Induction hardening is the process of

Cyaniding is the process of

Stress relaxation is the phenomenon

In nodular iron, graphite is in the form of

Phosphor bronze contains

A material is known as allotropic or polymorphic if it

Sulphur in cast iron

An example of amorphous material is

Steel made from phosphate iron is

The alloying element which reduces the formation of iron sulphide in steel is

In low carbon steels, ________ raises the yield point and improves the resistance to atmospheric corrosion.

Permalloy is a

Process of Austempering results in

Which is false statement about tempering? Tempering is done to

An important property of malleable cast iron in comparison to grey cast iron is the high

Malleable cast iron is produced

The unique property of cast iron is its high

Pick up the wrong statement Nickel and chromium in steel help in

Annealing of white cast iron results in production of

Beryllium bronze has

The type of space lattice found in gamma-iron is

The type of space lattice found in alpha-iron is

The maximum internal diameter of a blast furnace is about

The hardness of steel depends upon the

The purpose of heat treatment is to

The tensile strength of wrought iron is maximum

Sulphur in steel

Connecting rod is, usually, made from

Ball bearings are, usually, made from

A small percentage of boron is added to steel in order to

An eutectoid steel consists of

Brass is an alloy of

The transistor is made of

Surveying tapes are made of a material having low coefficient of expansion and enough strength. The alloy used is

In compression, a prism of brittle material will break

Hardness of lower bainite (tempered martensite) is about

The compressive strength of cast iron is __________ that of its tensile strength.

Chromium when added to steel _________ the tensile strength.

Shock resisting steels should have

White metal contains

Which of the following has a fine gold colour and is used for imitation jewellery?

Large forgings, crank shafts, axles normally contain carbon up to

Cemented carbide tools are not found to be suitable for cutting

The aluminium alloy made by melting aluminium with 2 to 10% magnesium and 1.75% copper is called

A steel containing 16 to 18% chromium and about 0.12% carbon is called

Which of the following is added in low carbon steels to prevent them from becoming porous?

The correct composition of Babbitt metal is

'Killed steels' are those steels

Tin base white metals are used where the bearings are subjected to

Elinvar, an alloy used in precision instruments, hair springs for watches, etc. contains the following element as principal alloying element

Which of the following statement is incorrect about duralumin?

Pearlite is a combination of

Austenite is a combination of

If a refractory contains high content of silicon, it means refractory is

The bond formed by transferring electrons from one atom to another is called

Which of the following constituents of steels is softest and least strong?

Which of the following property is desirable in parts subjected to shock and impact loads?

Crystal structure of a material is, generally, examined by

Macrostructure of a material is, generally, examined by

Structural steel contains following principal alloying elements

The most effective inhibitor of grain growth, when added in small quantities is

Monel metal is an alloy of

Delta metal is an alloy of

Materials after cold working are subjected to following process to relieve stresses

Argentite is the principal ore or raw material for

Melting point of iron is

The metallic structure of mild steel is

The basic constituents of Hastelloy are

The crystal structure of gamma iron is

The coke in the charge of blast furnace

The crystal of alpha iron is

Which of the following alloys does not contain tin?

Railway rails are normally made of

Which of the following display properties similar to that of steel?

When low carbon steel is heated up to upper critical temperature

When low carbon steel is heated up to lower critical temperature

The lower critical temperature

The temperature at which ferromagnetic alpha iron transforms to paramagnetic alpha iron is

The unit cells

Pig iron is the name given to

Which of the following impurity in cast iron promotes graphite nodule formation and increases the fluidity of the molten metal?

Wrought iron is

Which of the following alloys does not have copper as one of the constituents?

Which is false statement about case hardening? Case hardening is done by

The machinability of aluminium increases when _________ is added to aluminium.

In high speed steels, manganese is used to tougher the metal and to increase its

Following elements have face-centered cubic structure

The crystal structure of brass is

Which of the following has highest specific strength of all structural materials?

Blast furnace produces following by reduction of iron ore

Shock resistance of steel is increased by adding

Corrosion resistance of steel is increased by adding

Cobalt in steel

Which of the following property is desirable for materials used in tools and machines?

Cupola produces following material

Mild steel belongs to the following category

The usual composition of a soldering alloy is

The metal suitable for bearings subjected to light loads, is

The metal suitable for bearings subjected to heavy loads, is

Silicon when added to copper improves

Nickel when added to copper improves

For the allotropic forms of iron, the points of arrest are

Hematite iron ore contains iron about

Thermoplastic materials are those materials which

Admiralty brass used for steam condenser tubes contains copper and zinc in the following ratio

Alnico, an alloy used extensively for permanent magnets contains iron, nickel, aluminium and cobalt in the following ratio

Heavy duty leaf and coil springs contain carbon of the following order

Cold rolled steel sheets contain carbon of the following order

In full annealing, the hypo eutectoid steel is heated from 30°C to 50°C above the upper critical temperature and then cooled

Steel containing ferrite and pearlite is

Ductile cast iron

Which of the following steel making process is being adopted at Rourkela (in India) Steel Plant?

Quenching is not necessary when hardening is done by

The alloy, mainly used for corrosion resistance in stainless steels is

The loss of strength in compression with simultaneous gain in strength in tension due to overloading is known as

In basic Bessemer process, the furnace is lined with

Babbitt metal is a

Which of the following iron exist between 910°C and 1403°C?

In induction hardening ________ is high.

According to Indian standard specifications, SG 400/15 means

Paramagnetic alpha iron changes to gamma iron at

Pure iron is the structure of

Gun metal contains

Which is the false statement about wrought iron? It has

Foundry crucible is made of

Perminvar alloy having constant permeability is an alloy of

Tungsten in steel

Closed packed hexagonal space lattice is found in

Body centered cubic space lattice is found in

A material is said to be allotropic, if it has

The surface hardness of the following order is achieved by nitriding operation

Slow plastic deformation of metals under a constant stress is known as

An alloy of copper, tin and zinc is known as

Depth of hardness of steel is increased by addition of

Which of the following metal shrinks most from molten state to solid state?

Steel contains

Which of the following statement is correct?

The heat treatment process used for softening hardened steel is

The percentage of carbon in low carbon steel is