Building Construction
The type of roof suitable in plains where rainfall is meagre and temperature is high is

Flat roof
Pitched and sloping roof
Shell roof
None of these

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Building Construction
In a colar beam roof

There is a horizontal tie at the feet of rafters only
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
There is no horizontal tie beam

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