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Concrete Technology and Design of Concrete Structures

Concrete Technology and Design of Concrete Structures
Modulus of elasticity of steel as per IS : 456-1978 shall be taken as

200kN/mm²
200 kN/cm²
2xl06N/cm²
20 kN/cm²

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Concrete Technology and Design of Concrete Structures
Sinking of an intermediate support of a continuous beami) reduces the negative moment at supportii) increases the negative moment at supportiii) reduces the positive moment at center of spaniv) increases the positive moment at center of span The correct answer is

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

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Concrete Technology and Design of Concrete Structures
Cube strength of controlled concrete to be used for pretensioned and post-tensioned work respectively should not be less than

42 MPa and 35 MPa
35 MPa and 42 MPa
53 MPa and 42 MPa
42 MPa and 53 MPa

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Concrete Technology and Design of Concrete Structures
According to IS: 456-1978, the column or the strut is the member whose effective length is greater than

The least lateral dimension
4 times the least lateral dimension
2 times the least lateral dimension
3 times the least lateral dimension

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Concrete Technology and Design of Concrete Structures
For a longitudinal reinforcing bar in a column, the minimum cover shall neither be less than the diameter of bar nor less than

45mm
60 mm
40 mm
50 mm

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Concrete Technology and Design of Concrete Structures
Increase in the moisture content in concrete

All of these
increases the strength
does not change the strength
reduces the strength

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