Building Construction
Which one of the following piles has a cast iron shoe even after removal of the hollow cylindrical steel casing?

Pedestal pile
Vibro pile
Both (A) and (C) of the above
Simplex pile

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Building Construction
Slate

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

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