Building Construction
In the method of tube boring of soil investigation, the following is essential:

The tube is raised and lowered by 4 thick rope moving over a pulley suspended on a tripod stand
A tube of about 2 meters length and 20 cm diameter with a cutting edge
A flap valve at the bottom of tube is provided to extract the soil sample
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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
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The least plastic type normally consists of more or less equidimensional grains of quartz

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