Concrete Technology and Design of Concrete Structures
Assertion A : The load factor for live load is greater than that for dead load.Reason R : The live loads are more uncertain than dead loads.Select your answer based on the coding system given below :

Both A and R are true and R is the correct explanation of A.
Both A and R are true but R is not the correct explanation of A.
A is false but R is true.
A is true but R is false.

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Concrete Technology and Design of Concrete Structures
Due to circumferential action of the spiral in a spirally reinforced column

Both the capacity of column and ductility of column increase
Capacity of column is decreased
Ductility of column reduces
Capacity of column is decreased but ductility of column increases

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

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

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