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Building Materials

Building Materials
Pig iron is manufactured from the ores by

Smelting
All of these
Calcination and roasting
Dressing

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Building Materials
The size of mould for bricks, is generally kept

Equal to specified size
A little small to specified size
A little large to specified size
10% larger than specified size

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Building Materials
Lime putty

All of above
Can be used only upto three days
Is made from hydraulic lime
Is made by adding lime to water

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Building Materials
Spalling hammer is used for

Rough dressing of stones
Breaking small projection of stones
Driving wooden headed chisels
Carving of stones

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Building Materials
Vanadium steel is generally used for

Bearing balls
Axles and springs
Magnets
Railway switches and crossing

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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
Clay
Lime stone

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