Building Construction
The window which projects outside a room of a building for admitting more light and air, is known

Casement window
Dormer window
Lantern window
Bay window

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Building Construction
In a colar beam roof

There is a horizontal tie at the feet of rafters only
There is no horizontal tie beam
There are two horizontal ties, one at the feet and other at the middle of the rafters
There is a horizontal tie at almost the middle of rafters only

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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
A tube of about 2 meters length and 20 cm diameter with a cutting edge
All listed here
The tube is raised and lowered by 4 thick rope moving over a pulley suspended on a tripod stand

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