Building Construction
In the method of tube boring of soil investigation, the following is essential:

A flap valve at the bottom of tube is provided to extract the soil sample
All listed here
A tube of about 2 meters length and 20 cm diameter with a cutting edge
The tube is raised and lowered by 4 thick rope moving over a pulley suspended on a tripod stand

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Building Construction
Which one of the following factors is considered for the orientation of buildings?

All listed here
The extent up to which the sunrays penetrate with the verandah
The direction of the prevailing winds in the area
The exposure of the walls and roof of the buildings to the rays of sun

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