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.
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.

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Concrete Technology and Design of Concrete Structures
If the depth of neutral axis for a singly reinforced rectangular section is represented by kd in working stress design, then the value of k for balanced section

is independant of both ast and acbc where d is the effective depth, ast is per-missible stress in steel in tension and ocbc is permissible stress in concrete in bending compression.
depends on both crst and acbc
depends on as, only
depends on aCbC only

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Concrete Technology and Design of Concrete Structures
The critical section for finding maximum bending moment for footing under masonry wall is located

halfway between the middle and edge of the wall
at a distance equal to effective depth of footing from the edge of the wall
at the middle of the wall
at the edge of the wall

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