Engineering Materials Which contains aggregate? Concrete Silicon Cement Glass Al
ID: 1842865 • Letter: E
Question
Engineering Materials
Which contains aggregate? Concrete Silicon Cement Glass Alloy In general, what is a glass? Aerosol Alloy Amorphous solid Composite Crystalline solid Which of the following is made by melting and solidifying together two or more elements, one of which is a metal? Alloy Ceramic Polymer Composite Amorphous solid 4. at is silicone? An oxide B. A polymer An element A composite An alloy What is silicon? An oxide A polymer An element A composite An alloy What is silica? An oxide A polymer An element A composite An alloy Which is a reversible process Creep Fatigue Fracture Plastic deformation Elastic deformation In the context of this course, what is fatigue? Slow, continuous deformation with time Reversible deformation under a load Failure caused by fluctuating loads Failure caused by chemical attack Slow oxidation. In the context of this course, what is toughness? Ability to absorb mechanical energy without fracturing Ability to deform plastically without fracturing Resistance to elastic deformation Resistance to permanent surface indentation or scratching Resistance to high temperatures In the context of this course, what is hardness? Ability to absorb mechanical energy without fracturing Ability to deform plastically without fracturing Resistance to elastic deformation Resistance to permanent surface indentation or scratching Resistance to high temperatures In the context of this course, what is stiffness? Ability to absorb mechanical energy without fracturing Ability to deform plastically without fracturing Resistance to elastic deformation Resistance to permanent surface indentation or scratching Resistance to high temperatures In the context of this course, what is ductility? Ability to absorb mechanical energy without fracturing Ability to deform plastically without fracturing Resistance to elastic deformation Resistance to permanent surface indentation or scratching Resistance to high temperaturesExplanation / Answer
1)a- concrete
aggregates an essential ingredient in concrete.Aggregates, which account for 60 to 75 percent of the total volume of concrete, are divided into two distinct categories--fine and coarse. Fine aggregates generally consist of natural sand or crushed stone.Coarse aggregates are any particles greater than 0.19 inch.
2)c- amorphous solid
it is non crystalline,a hard, brittle substance, typically transparent or translucent, made by fusing sand with soda and lime and cooling rapidly.
4)b-polymer
Silicone include any inert, synthetic compound made up of repeating units of siloxane, which is a chain of alternating silicon atoms and oxygen atoms, frequently combined with carbon or/and hydrogen.
5)c- an element
Silicon is a chemical element with symbol Si
atomic number 14.
A hard and brittle crystalline solid with a blue-gray metallic luster.
It is non-metal with semiconducting properties, used in making electronic circuits.
6)a-an oxide
also known Silicon dioxide, chemical formula SiO
a hard, unreactive, colourless compound which occurs as the mineral quartz and as a principal constituent of sandstone and other rocks
7)d-plastic deformation
Once the forces are no longer applied, the object returns to its original shape.
8)c-failure caused by fluctuating loads
Fatigue occurs when a material is subjected to repeated loading and unloading.
9)A
toughness is the ability of a material to absorb energy and without fracturing.
10)b-ability to deform plastically without fracturing
also resistance to bending, scratching, abrasion or cutting.
11)c-resistance to elastic deformation
resists deformation in response to an applied force
It is the complementary concept is flexibility
12)B-ability to deform plastically without fracturing
ductlity is the ability of a material to change shape (deform) usually by stretching along its length’.
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