Concrete Technology and Design of Concrete Structures
According to IS : 456-1978, the fiexural strength of concrete is

directly proportional to compressive strength
inversely proportional to compressive strength
inversely proportional to square root of compressive strength
directly proportional to square root of compressive strength

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Concrete Technology and Design of Concrete Structures
Select the incorrect statement...

Pretensioning system has greater certainty about its durability.
None of these
For heavy loads and large spans in buildings or bridges, post-tensioning system is cheaper than pretensioning system
The loss of prestress is more in pre-tensioning system than in post-tensioning system.

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Concrete Technology and Design of Concrete Structures
If the foundations of all the columns of a structure are designed on the total live and dead load basis, then

the settlement of exterior columns will be more than interior columns
there will be no settlement of columns
the settlement of interior columns will be more than exterior columns
there will be no differential settlement

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