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Concrete Technology and Design of Concrete Structures

Concrete Technology and Design of Concrete Structures
Ratio of permissible stress in direct compression and bending compression is

greater than 2
less than 1
between 1 and 1.5
between 1.5 and 2.0

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Concrete Technology and Design of Concrete Structures
The design yield stress of steel according to IS: 456-1978 is (where fy is the characteristic yield strength of steel)

0.57 fy
0.67 fy
0.37 fy
0.87 fy

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Concrete Technology and Design of Concrete Structures
The property of fresh concrete, in which the water in the mix tends to rise to the surface while placing and compacting, is called

bulking
segregation
bleeding
creep

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Concrete Technology and Design of Concrete Structures
The main reinforcement in the heel of a T-shaped R.C. retaining wall is provided on

None of these
bottom face perpendicular to wall
both top and bottom faces perpendicular to wall
top face perpendicular to wall

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

15%
10%
20%
5%

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Concrete Technology and Design of Concrete Structures
Air entrainment in the concrete increases

strength
workability
the unit weight
the effects of temperature variations

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