Building Construction
The foundation which consists of a thick reinforced cement slab covering whole area to support heavy concentrated structural loads, is known as

Strap footing
Combined footing
Raft footing
None of these

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Building Construction
Auger boring

All of these
Is most economical up-to a depth of 5 meters
Is generally employed in cohesive and other self soils above water table
Is the most primitive method for making a hole in the ground

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