2
Exac materials Exam question with accurate detailed
|| || || || || || ||
answers
material selection properties-what are the requirement for the most suitable structural
|| || || || || || || || || || ||
material? - ✔✔the structural material that combine stiffness and elasticity are considered
|| || || || || || || || || || || ||
the most suitable material.
|| || ||
material selection properties-elasticity? - ✔✔The ability of a material to bounce back after
|| || || || || || || || || || || || ||
being disturbed ||
- the ability of the body to deform under stress, bend, stretch and compress when the
|| || || || || || || || || || || || || || || || ||
external forces are applied and return to its original shapes when the forces are removed.
|| || || || || || || || || || || || || ||
material selection properties-elastic limit? - ✔✔Maximum stress that a material will
|| || || || || || || || || || ||
withstand without permanent deformation. || || ||
material selection properties-Ductile material - ✔✔A material which can be drawn out into
|| || || || || || || || || || || || ||
a wire. This implies that plastic strain occurs under enough stress.
|| || || || || || || || || ||
- the material that undergo plastic deformation before breakage are called ductile material.
|| || || || || || || || || || || ||
material selection properties-plastic deformation - ✔✔permanent deformation caused by
|| || || || || || || || ||
strain when stress exceeds a certain value
|| || || || || ||
material selection properties-Brittle material - ✔✔A material that undergoes little
|| || || || || || || || || ||
deformation under increasing force, until it breaks suddenly. example glass || || || || || || || || ||
material selection properties-stiffness? - ✔✔The resistance of an elastic body to deflection
|| || || || || || || || || || || ||
by an applied force.
|| || ||
,2
the force that is applied to the material to bring it to the elastic limit.
|| || || || || || || || || || || || || ||
material selection properties-what is dimension stability of the material? - ✔✔the property
|| || || || || || || || || || || ||
of the material to keep its dimension properties especially when the direct affect of the
|| || || || || || || || || || || || || || ||
moisture content or atmosphere are applied to it. dimension ability is important when
|| || || || || || || || || || || || ||
considering material selection. || ||
material selection properties-water and vapor resistance - ✔✔the resistance to water and
|| || || || || || || || || || || ||
vapour is an important factor in selection of the material for construction.
|| || || || || || || || || || ||
material selection properties-thermal conductivity - ✔✔The ability of an object to transfer
|| || || || || || || || || || || ||
heat
material selection properties-material selection and light, radiant heat, transmission ? -
|| || || || || || || || || || ||
✔✔the material property that reflect or absorb light are important factors for deciding a
|| || || || || || || || || || || || || ||
material selection || ||
the reflection or absorption of radiant heat should also be considered in selecting the
|| || || || || || || || || || || || || ||
material.
material selection properties- what is density and hardness of a material? - ✔✔the ability to
|| || || || || || || || || || || || || || ||
resist wear and abrasiveness. durability of a material.
|| || || || || || ||
important factor when considering material section.
|| || || || ||
material selection properties - combustion
|| || || || ||
combustion - ✔✔the property of the material to resist combustion.
|| || || || || || || || || ||
-withstand exposure to fire. || || ||
,2
-not produce toxic smoke/gases or smell.
|| || || || ||
material selection properties - colour, texture, scale , shapes - ✔✔important factor
|| || || || || || || || || || || ||
considering design requirement and presentation of the material. || || || || || || || ||
many material are produces in certain shapes and sizes, it varries with the manufacture
|| || || || || || || || || || || || || ||
little bit but relatively small. this is also a factor to consider when selection of the material.
|| || || || || || || || || || || || || || || || ||
eg- bricks, stock dimension etc.
|| || || ||
material selection properties? - ✔✔elasticity || || || ||
ductile material ||
stiffness
plastic deformation || ||
resistance to water and vapor || || || ||
brittle material ||
resistance to exposure to heat, not producing toxic waste etc.
|| || || || || || || || || ||
absorption of light, || || ||
absorption of sound || ||
colour/texture /shape ||
combustion ||
thermal conductivity ||
What is a life cycle assessment? - ✔✔the selection and valuation of material should not only
|| || || || || || || || || || || || || || ||
limit to its functional aspect, aesthetic and economic aspect but should also consider the
|| || || || || || || || || || || || || || ||
impact of the the environmental factors.|| || || || || ||
, 2
The investigation and valuation of the environmental impacts of a given product or service
|| || || || || || || || || || || || || ||
caused or necessitated by its existence.
|| || || || ||
the life cycle assessment of a material includes,
|| || || || || || || ||
-extraction of the raw material. || || || || ||
-processing of the raw material. || || || || ||
-manufacturing, packaging and transportation of the finished product || || || || || || ||
-maintenance of the material in use. || || || || || ||
-possible recycling and reuse of the material and its final disposal.
|| || || || || || || || || ||
Life Cycle Assessment of material include three component? - ✔✔-input
|| || || || || || || || ||
-life cycle inventory
|| ||
-output
what is input component of life cycle assessment? - ✔✔raw material, energy and water
|| || || || || || || || || || || || ||
processes are ||
- acquisition of raw material---- the extractions of raw material and its impact on the
|| || || || || || || || || || || || || || ||
environment. Is the material extracted is renewable or nonrenewable eg. metals are non
|| || || || || || || || || || || || ||
renewable ||
where as timber can be renewable resource
|| || || || || ||
-processing, manufacturing and packaging ----what are energy and water requirement for
|| || || || || || || || || || ||
the processing, manufacturing and packaging.
|| || || || ||
-transportation and distribution || ||
-construction use and distribution . || || || ||
-disposal, recycling and reuse. || || ||
Exac materials Exam question with accurate detailed
|| || || || || || ||
answers
material selection properties-what are the requirement for the most suitable structural
|| || || || || || || || || || ||
material? - ✔✔the structural material that combine stiffness and elasticity are considered
|| || || || || || || || || || || ||
the most suitable material.
|| || ||
material selection properties-elasticity? - ✔✔The ability of a material to bounce back after
|| || || || || || || || || || || || ||
being disturbed ||
- the ability of the body to deform under stress, bend, stretch and compress when the
|| || || || || || || || || || || || || || || || ||
external forces are applied and return to its original shapes when the forces are removed.
|| || || || || || || || || || || || || ||
material selection properties-elastic limit? - ✔✔Maximum stress that a material will
|| || || || || || || || || || ||
withstand without permanent deformation. || || ||
material selection properties-Ductile material - ✔✔A material which can be drawn out into
|| || || || || || || || || || || || ||
a wire. This implies that plastic strain occurs under enough stress.
|| || || || || || || || || ||
- the material that undergo plastic deformation before breakage are called ductile material.
|| || || || || || || || || || || ||
material selection properties-plastic deformation - ✔✔permanent deformation caused by
|| || || || || || || || ||
strain when stress exceeds a certain value
|| || || || || ||
material selection properties-Brittle material - ✔✔A material that undergoes little
|| || || || || || || || || ||
deformation under increasing force, until it breaks suddenly. example glass || || || || || || || || ||
material selection properties-stiffness? - ✔✔The resistance of an elastic body to deflection
|| || || || || || || || || || || ||
by an applied force.
|| || ||
,2
the force that is applied to the material to bring it to the elastic limit.
|| || || || || || || || || || || || || ||
material selection properties-what is dimension stability of the material? - ✔✔the property
|| || || || || || || || || || || ||
of the material to keep its dimension properties especially when the direct affect of the
|| || || || || || || || || || || || || || ||
moisture content or atmosphere are applied to it. dimension ability is important when
|| || || || || || || || || || || || ||
considering material selection. || ||
material selection properties-water and vapor resistance - ✔✔the resistance to water and
|| || || || || || || || || || || ||
vapour is an important factor in selection of the material for construction.
|| || || || || || || || || || ||
material selection properties-thermal conductivity - ✔✔The ability of an object to transfer
|| || || || || || || || || || || ||
heat
material selection properties-material selection and light, radiant heat, transmission ? -
|| || || || || || || || || || ||
✔✔the material property that reflect or absorb light are important factors for deciding a
|| || || || || || || || || || || || || ||
material selection || ||
the reflection or absorption of radiant heat should also be considered in selecting the
|| || || || || || || || || || || || || ||
material.
material selection properties- what is density and hardness of a material? - ✔✔the ability to
|| || || || || || || || || || || || || || ||
resist wear and abrasiveness. durability of a material.
|| || || || || || ||
important factor when considering material section.
|| || || || ||
material selection properties - combustion
|| || || || ||
combustion - ✔✔the property of the material to resist combustion.
|| || || || || || || || || ||
-withstand exposure to fire. || || ||
,2
-not produce toxic smoke/gases or smell.
|| || || || ||
material selection properties - colour, texture, scale , shapes - ✔✔important factor
|| || || || || || || || || || || ||
considering design requirement and presentation of the material. || || || || || || || ||
many material are produces in certain shapes and sizes, it varries with the manufacture
|| || || || || || || || || || || || || ||
little bit but relatively small. this is also a factor to consider when selection of the material.
|| || || || || || || || || || || || || || || || ||
eg- bricks, stock dimension etc.
|| || || ||
material selection properties? - ✔✔elasticity || || || ||
ductile material ||
stiffness
plastic deformation || ||
resistance to water and vapor || || || ||
brittle material ||
resistance to exposure to heat, not producing toxic waste etc.
|| || || || || || || || || ||
absorption of light, || || ||
absorption of sound || ||
colour/texture /shape ||
combustion ||
thermal conductivity ||
What is a life cycle assessment? - ✔✔the selection and valuation of material should not only
|| || || || || || || || || || || || || || ||
limit to its functional aspect, aesthetic and economic aspect but should also consider the
|| || || || || || || || || || || || || || ||
impact of the the environmental factors.|| || || || || ||
, 2
The investigation and valuation of the environmental impacts of a given product or service
|| || || || || || || || || || || || || ||
caused or necessitated by its existence.
|| || || || ||
the life cycle assessment of a material includes,
|| || || || || || || ||
-extraction of the raw material. || || || || ||
-processing of the raw material. || || || || ||
-manufacturing, packaging and transportation of the finished product || || || || || || ||
-maintenance of the material in use. || || || || || ||
-possible recycling and reuse of the material and its final disposal.
|| || || || || || || || || ||
Life Cycle Assessment of material include three component? - ✔✔-input
|| || || || || || || || ||
-life cycle inventory
|| ||
-output
what is input component of life cycle assessment? - ✔✔raw material, energy and water
|| || || || || || || || || || || || ||
processes are ||
- acquisition of raw material---- the extractions of raw material and its impact on the
|| || || || || || || || || || || || || || ||
environment. Is the material extracted is renewable or nonrenewable eg. metals are non
|| || || || || || || || || || || || ||
renewable ||
where as timber can be renewable resource
|| || || || || ||
-processing, manufacturing and packaging ----what are energy and water requirement for
|| || || || || || || || || || ||
the processing, manufacturing and packaging.
|| || || || ||
-transportation and distribution || ||
-construction use and distribution . || || || ||
-disposal, recycling and reuse. || || ||
