Building Materials
Spalling hammer is used for

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

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Building Materials
Pick up correct statement from the following:

All listed here
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

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