Building Construction
The black cotton soil

All of these
Shrinks excessively when dry
Swells excessively when wet
Undergoes volumetric changes

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Building Construction
Pick up the consideration to the taken while designing a hospital from the following:

Casualty unit should be provided a separate entrance
All listed here
The operation theater unit to be detached as it requires sterilized zone but near the ward for the patients and doctor
The mortuary should be detached from the main circulation with a post-mortem room

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Building Construction
During percussion drilling

Ground water observations are hindered due to entry of the slurry in the soil below the bottom of the hole
The soil to a considerable depth below the bottom of the hole gets disturbed
All listed here
Caving or mixing of strata are caused in soft soils or cohesion-less soils

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