Building Materials
Cast iron

Is obtained by purifying pig iron
All listed here
May contain 2 to 5 per cent of carbon with other impurities
Is manufactured in required shapes

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Building Materials
Pick up correct statement from the following:

Fibre boards are obtained by impregnating a resin product on fibres
Fibre boards are used for light weight standing members
Fibre boards are used for thermal and acoustic control
All listed here

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