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Concrete Technology and Design of Concrete Structures

Concrete Technology and Design of Concrete Structures
In case of hand mixing of concrete, the extra cement to be added is

5%
15%
10%
20%

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Concrete Technology and Design of Concrete Structures
The relation between modulus of rupture fcr, splitting strength fcs and direct tensile strength fcl is given by

fcr>fcs>fc.
tcr – rcs = tct
fc5>fcr>fC
fcr

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Concrete Technology and Design of Concrete Structures
The ratio of the diameter of reinforcing bars and the slab thickness is

1/5
1/6
1/8
1/4

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Concrete Technology and Design of Concrete Structures
For a continuous slab of 3 m x 3.5 m size, the minimum overall depth of slab to satisfy vertical deflection limits is

75 mm
120 mm
50 mm
100 mm

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Concrete Technology and Design of Concrete Structures
Modulus of rupture of concrete is a measure of

flexural tensile strength
direct tensile strength
split tensile strength
compressive strength

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

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