Building Construction
Slate

Has a smooth surface and contains alumina and silica
Possesses good water absorption capacity
Splits into thin sheets along its bedding planes
Is a metamorphic rock

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Building Construction
Which one of the following factors is considered for the orientation of buildings?

All listed here
The direction of the prevailing winds in the area
The exposure of the walls and roof of the buildings to the rays of sun
The extent up to which the sunrays penetrate with the verandah

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