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19.

As compared to ordinary portland cement, use of pozzuolanic cement                        
A. reduces workability B. increases bleeding
C. increases shrinkage D. increases strength



20.

As per Whitney's theory, the maximum moment of resistance of the balanced section of a beam of width b and effective depth d is given by
where acy is the cylinder compressive strength of concrete                        
A. ^acybd2 B. ^acybd2
C. 0.185acybd2 D. 0.43acybd2



21.

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




22.

Bulking of sand is maximum if moisture content is about                        
A. 2% B. 4%
C. 6% D. 10%



23.

Critical section for shear in case of flat slabs is at a distance of                        
A. effective depth of slab from periphery of column/drop panel B. d/2 from periphery of column/capital/ drop panel
C. at the drop panel of slab D. at the periphery of column



24.

Cube strength of controlled concrete to be used for pretensioned and post-tensioned work respectively should not be less than                        
A. 35 MPa and 42 MPa B. 42 MPa and 35 MPa
C. 42 MPa and 53 MPa D. 53 MPa and 42 MPa



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