Building Construction
For constructing a terrazzo floor, Pick up the incorrect statement from the following:

After final grinding is over, oxalic acid mixed with water is spread over and rubbed hard with soft material
Glass strips are driven into the layer according to the pattern required
A 32 mm thick layer of cement concrete (1 : 2 : 4) is laid on the base course and the surface is made smooth by trowelling
A base course is prepared as in cement concrete flooring

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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
All listed here
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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