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

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Building Construction
Mansard roof is a roof which slopes in

Four directions without break in the slope on each side
Four directions with break in the slope on each side
Two directions with break in the slope on each side
Two directions without break in the slope on each side

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