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1
Q

materials that are used as raw material for any sort of
construction or manufacturing in an organized way of engineering applications.

A

ENGINEERING MATERIALS

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2
Q

polycrystalline bodies which are having number of differentially
oriented fine crystals.

A

METALS

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3
Q

metals are having iron as common element.

A

FERROUS METALS

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4
Q

metals are having very low permeability.

A

NON-FERROUS METALS

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5
Q

non-crystalline in nature. This exists in amorphic or
mesomorphic forms

A

NON-METALS

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6
Q

Engineering materials can also be classified as

A
  1. Metals and Alloys
  2. Ceramic Materials
  3. Organic Materials
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7
Q

are having very a low mechanical strength, which sometimes does not
match with the mechanical strength required for certain applications

A

PURE METAL

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8
Q

are the composition of two or more metals and non-metals together. Alloys are
having good mechanical strength, low temperature coefficient of resistance.

A

ALLOYS

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9
Q

non-metallic solids

A

CERAMIC MATERIALS

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10
Q

are usually long chain organic macro-molecules with co-valent
bonds. Each molecule is formed from a large number of unitary molecules known
as Monomer

A

POLYMER

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11
Q

are macro-physical combination of different phases where the aim
is to combine beneficial properties of the constituent materials.

A

COMPOSITE

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12
Q

are having carbon as a common element

A

ORGANIC MATERIALS

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13
Q

properties, which directly influence the choice of material, can be
summarized under the following categories:

A
  1. Physical properties
  2. Mechanical properties
  3. Chemical properties
  4. Electrical properties
  5. Magnetic Properties
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14
Q

“the mass per unit volume”. kg/m³

A

DENSITY OF MATERIAL

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15
Q

defined as the ratio of density of material with respect to density of a reference
material or substance.

A

SPECIFIC DENSITY OF MATERIALS

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16
Q

temperature at which the substance changes from one
state to another state

A

STATE CHANGE TEMPERATURE

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17
Q

represents the expansion in material with increase in temperature.

A

COEFFICIENT IN THERMAL EXPANSION (AREA,LINEAR,VOLUME)

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18
Q

the amount of heat required to increase the
temperature of unit mass of material by 1°C.

A

SPECIFIC HEAT OF MATERIAL

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19
Q

the amount of heat required/released by change
in unit mass of material from one state to another state (Phase change)

A

LATENT HEAT

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20
Q

property of material which represents that how easily a material can flow in liquid
state. It is reciprocal to the viscosity of a material

A

FLUIDITY OF MATERIALS

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21
Q

property of a material which presents that how easily the two pieces of material
can be welded together by applying pressure or heat or both.

A

WELD ABILITY OF MATERIALS

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22
Q

property of a material by which it regains its original dimensions on removal
of load or force.

A

ELASTICITY OF MATERIAL

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23
Q

increasing the load beyond the limit of elasticity, the material retains
it molded state.

A

PLASTICITY OF MATERIALS

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24
Q

quantity of voids in solid materials

A

POROSITY OF MATERIALS

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25
the amount of heat transmitted by unit thickness of material normal to the unit area surface in unit time when the temperature gradient across the material piece is unity in steady state condition".
THERMAL CONDUCTIVITY OF MATERIAL
26
property of materials which represents that how easily the electricity can be conducted by the material. It is denoted by ‘σ’. It is the reciprocal of resistivity of material. It unit is mho/meter.
ELECTRICAL CONDUCTIVITY OF MATERIAL
27
property of a material which opposes the deformation or breakdown of material in presence of external forces or load
STRENGTH
28
ability of a material to be deformed and to return to the original shape
ELASTICITY
29
ability to resist deformation
STIFFNESS
30
ability of the material to bend easily
FLEXIBILITY
31
ability of a metal to be deformed considerably without ruptur
PLASTICITY
32
ability of material to get stretched into a wire by pulling or drawing. High temp=High_____
DUCTILITY
33
susceptibility to extreme deformation in rolling or hammering
MALLEABILITY
34
ability of a material to absorb the energy and gets plastically deformed without fracturing
TOUGHNESS
35
ability of material to absorb the energy when it is deformed elastically by applying stress and release the energy when stress is removed.
RESILIENCE
36
ability of a material to resist to permanent shape change due to external stress. (scratch,identation,rebound)
HARDNESS
37
tendency to fracture without appreciable deformation.
BRITTLENESS
38
property of a material which indicates the tendency of material to move slowly and deform permanently under the influence of external mechanical stress
CREEP AND SLIP
39
weakening of material caused by the repeated loading of the material.
FATIGUE
40
somewhat indefinite property that refers to the relative ease with which a material can be cut.
MACHINABILITY
41
indicates the elements which are combined together to form that material
CHEMICAL COMPOSITION
42
represents how atoms are bounded to each other to form the material.
ATOMIC BONDING
43
forms by exchanging of valence electrons between atoms
IONIC BONDING
44
forms by sharing of electrons between atoms.
COVALENT BONDS
45
found in metals(bonds)
METALLIC BOND
46
ability of material to resist the oxidation in atmospheric condition
CORROSION RESISTANCE
47
indicates that how they react with other materials.
ACIDITY AND ALKALINITY
48
property of material which resists the flow of electric current through material.
RESISTIVITY
49
property of material with allow the flow of electric current through material
CONDUCTIVITY
50
property of material which indicates the ability of material to withstand at high voltages.
DIELECTRIC STRENGTH
51
indicates the change in resistance of material with change in temperature
TEMPERATURE COEFFICIENT OF RESISTANCE
52
junction formed by joining to two metals is heated, a small voltage in the range of millivolt is produced
THERMOELECTRICITY
53
property of magnetic material which indicates that how easily the magnetic flux is build up in material
PERMEABILITY
54
even after removal of external magnetic field, some magnetization exists, which is called residual magnetism
RETENTIVITY
55
external magnetic motive force (ATs) required to overcome the residual magnetism is called “c_____ f_____” of material.
COERCIVE FORCE
56
property of magnetic material which resists to buildup of magnetic flux in material.
RELUCTANCE
57
Hexagonal Shades of red and reddish brown 70-60% 5- 6 HARDNESS
HEMATITE
58
Isometric Steel grey or black 72-62% 5.5- 6.5 HARDNESS
MAGNETITE
59
Amorphous Yellowish brown 63-59% 4- 5.5 HARDNESS
LIMONITE
60
Hexagonal Pale yellow to dark brown and black if Mn is present in excess 48% 3.5- 4 HARDNESS
SIDERITE
61
Isometric Dark yellow to yellowish brown 46% 6- 6.5 HARDNESS
PYRITE
62
form of mining in which the soil and the rock covering the mineral deposits are removed
SURFACE MINING
63
used to extract ore from below the surface of the earth safely, economically and with as little waste as possible
UNDERGROUND MINING
64
Crude ore, or ore mined in the natural state, seldom occurs in a pure state and requires some form of beneficiation
BENEFICIATION PRODUCTION OF PIG IRON

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