Building Materials
Early attainment of strength in rapid hardening cement is mainly due to

Tri-calcium silicate
Tri-calcium aluminate
Gypsum
Finer grinding

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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 thermal and acoustic control
All listed here
Fibre boards are used for light weight standing members

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Building Materials
The plywood

Cannot be bent more easily than ordinary wood of same thickness
Has greater impact resistance to blows than ordinary wood
Has good strength along the panel only
Can be spilt in the plane of the panel

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