Building Construction
Auger boring

Is most economical up-to a depth of 5 meters
Is the most primitive method for making a hole in the ground
Is generally employed in cohesive and other self soils above water table
All of these

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Building Construction
Mansard roof is a roof which slopes in

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

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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 base course is prepared as in cement concrete flooring
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

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