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
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

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Building Construction
Rotary drilling

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

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