Building Construction
Stability of an existing structure may be disturbed by

Vibrations caused by traffic movements
Rising of water table
Mining in the neighborhood
All listed here

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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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