Building Construction
Arches in the form of masonry arcs struck from more than four centres, are called

Two curved arches
Drop gothic arches
Gothic arches
Ogee arches

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Building Construction
Negative skin friction

Is a downward drag acting on a pile due to downward movement of the surrounding compressible soil relative to the pile
Both (A) and (B)
Develops due to lowering of ground water
Neither (A) not (B)

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