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

A base course is prepared as in cement concrete flooring
Glass strips are driven into the layer according to the pattern required
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

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Building Construction
Rotary drilling

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

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