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Building Materials

Building Materials
Plastics are compounds of carbon with element

Oxygen
Hydrogen
All of these
Nitrogen

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Building Materials
Seasoning of timber is done

To increase its temperature
To paint its surface
To make it water proof
To remove water

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Building Materials
Initial setting of cement is caused due to

Tetra calcium alumino ferrite
Tri-calcium aluminate
Di-calcium silicate
Tri-calcium silicate

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Building Materials
Sand stone is

Volcanic rock
Igneous rock
Sedimentary rock
Metamorphic rock

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Building Materials
The process of decarbonising the pig iron completely and then adding proper percentage of carbon for manufacturing steel, is called

Open hearth process
Cementation process
Crucible process
Bessemer process

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Building Materials
If the iron ore contains clay as an impurity, the flux added during calcination, is

All listed here
Argillaceous iron ore
Lime stone
Clay

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