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This is an MCQ-based quiz on Concrete Technology And Design Of Concrete Structures.
This includes Durability, Porosity and density, Fire resistance, Thermal and acoustic insulation properties, and Impact resistance.
The property of fresh concrete, in which the water in the mix tends to rise to the surface while placing and compacting, is called
Segregation
Bleeding
Bulking
Creep
A T-shaped retaining wall mainly conssits of
One cantilever
Two cantilevers
Three cantilevers
Four cantilevers
In a counterfort retaining wall, the main reinforcement in the stem at mid span is provided on
Front face only
Inner face only
Both front face and inner face
None of the above
The average permissible stress in bond for plain bars in tension is
Increased by 10% for bars in compression
Increased by 25% for bars in compression
Decreased by 10% for bars in compression
Decreased by 25% for bars in compression
Poisson’s ratio for concrete
Remains constant
Increases with richer mixes
Decreases with richer mixes
None of the above
Normally prestressing wires are arranged in the
Upper part of the beam
Lower part of the beam
Center
Anywhere
Modulus of rupture of concrete is a measure of
Flexural tensile strength
Direct tensile strength
Compressive strength
Split tensile strength
In order to obtain the best workability of concrete, the preferred shape of aggregate is
Rounded
Elongated
Angular
All of the above
In a counterfort retaining wall, the main reinforcement is provided on the
i) bottom face in front counterfort
ii) inclined face in front counterfort
iii) bottom face in back counterfort
iv) inclined face in back counterfort
The correct answer is
(i) and (ii),
(ii) and (iii)
(i) and (iv)
(iii) and (iv)
The effect of adding calcium chloride in concrete is
i) to increase shrinkage
ii) to decrease shrinkage
iii) to increase setting time
iv) to decrease setting time
The correct answer is
(i) and (iii)
(i)and(iv)
(ii) and (iii)
(ii) and (iv)
