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