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Building Materials

Building Materials
Pig iron is manufactured from the ores by

Calcination and roasting
All of these
Dressing
Smelting

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Building Materials
Softer variety of steel may be obtained by

Crucible process
Cementation process
Open hearth process
Bessemer process

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Building Materials
Asphalt is obtained from

Bitumen distillation
Plastic distillation
Petroleum distillation
None of these

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Building Materials
Steel contains carbon approximately

None to these
1.50% to 5.6%
0.25 %
0.05% to 1.75%

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Building Materials
Percentage of silica in a good brick earth lies between

70 to 80 %
5 to 10 %
50 to 60 %
20 to 30 %

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Building Materials
The rocks which are formed due to pouring of magma at the earth's surface are called

Igneous rocks
Volcanic rocks
Hypabyssal rocks
Plutonic rocks

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