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

In organic fine grained silt soil possesses no plasticity
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
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Building Construction
Rotary drilling

Is not economical for holes of less than 10 cm
Hinders the ground water observations and permeability test
Is not suitable for deposits containing very coarse gravel
All listed here

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