Concrete Technology and Design of Concrete Structures
Critical section for shear in case of flat slabs is at a distance of

effective depth of slab from periphery of column/drop panel
at the drop panel of slab
d/2 from periphery of column/capital/ drop panel
at the periphery of column

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Concrete Technology and Design of Concrete Structures
Examine the following statements :i) Factor of safety for steel should be based on its yield stress,ii) Factor of safety for steel should be based on its ultimate stress,iii) Factor of safety for concrete should be based on its yield stress,iv) Factor of safety for concrete should be based on its ultimate stress.The correct statements are

(ii) and (iv)
(i) and (iii)
(ii) and (iii)
(i) and (iv)

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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 :

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

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

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

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