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

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
Glass strips are driven into the layer according to the pattern required
A base course is prepared as in cement concrete flooring
After final grinding is over, oxalic acid mixed with water is spread over and rubbed hard with soft material

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Building Construction
During percussion drilling

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

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