Building Construction
Pick up the correct statement about silt soil from the following:

All listed here
The silt soil has particle size from 0.02 mm to 0.06 mm
The least plastic type normally consists of more or less equidimensional grains of quartz
In organic fine grained silt soil possesses no plasticity

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Building Construction
During percussion drilling

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

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