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Civil Engineering
Design Of Concrete Structures
Quiz 2
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Q.1
Maximum quantity of water needed perkg of cement for Mgrade of concrete is
28 liters
30 liters
32 liters
34 liters
Q.2
If the permissible stress in steel in tension isN/mm², then the depth of neutral axis for a singly reinforced rectangular balanced section will be
0.35 d
0.40 d
0.45 d
dependent on grade of concrete also
Q.3
Select the incorrect statement
Lean mixes bleed more as compared to rich ones.
Bleeding can be minimized by adding pozzuolana finer aggregate.
Bleeding can be increased by addition of calcium chloride.
none of the above
Q.4
Select the correct statement
Elastic modulus of high tensile steel is nearly the same as that of mild steel
Elastic modulus of high tensile steel is more than that of mild steel
Carbon percentage in high carbon steel is less than that in mild steel
High tensile steel is cheaper than mild steel
Q.5
The main reinforcement in the toe of a T- shaped R C. retaining wall is provided oni) top face parallel to the wallii) top face perpendicular to the walliii) bottom face paralleUo the walliv) bottom face perpendicular to the wallThe correct answer is
only (ii) is correct
(i) and (ii) are correct
(iii) and (iv) are correct
only (iv) is correct
Q.6
In the design of a front counterfort in a counterfort retaining wall, the main reinforcement is provided oni) bottom face near counterfortii) top face near counterfortiii) bottom face near centre of spaniv) top face near centre of span The correct answer is
only (i)
only (ii)
both (i) and (iv)
both (ii) and (iii)
Q.7
In a ring beam subjected to uniformly distributed loadi) shear force at mid span is zeroii) shear force at mid span is maximumiii) torsion at mid span is zeroiv) torsion at mid span is maximum The correct answer is
(i) and (iii)
(i) and (iv)
(ii) and (iii)
(ii) and (iv)
Q.8
Shrinkage of concrete depends uponi) humidity of atmosphereii) passage of timeiii) stress The correct answer is
(i) and (ii)
(ii) and (iii)
only (iii)
All (i), (ii) and (iii)
Q.9
In counterfort type retaining wallsi) the vertical slab is designed as a continuous slabii) the heel slab is designed as a continuous slabiii) the vertical slab is designed as a cantileveriv) the heel slab is designed as a cantileverThe correct answer is
(i) and (ii)
(i) and (iv)
(ii) and (iii)
(iii) and (iv)
Q.10
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
(i) and (iii)
(i) and (iv)
(ii) and (iii)
(ii) and (iv)
Q.11
The depth of footing for an isolated column is governed byi) maximum bending momentii) shear forceiii) punching shear The correct answer is
only (i)
(i) and (ii)
(i) and (iii)
(i), (ii) and (iii)
Q.12
The permissible diagonal tensile stress in reinforced brick work is
about 0.1 N/mm²
zero
0.3 N/mm² to 0.7 N/mm²
about 1.0 N/mm²
Q.13
The recommended value of modular ratio for reinforced brick work is
18
30
40
58
Q.14
Minimum thickness of load bearing RCC wall should be
50 mm
100 mm
150 mm
200 mm
Q.15
The minimum cover in a slab should neither be less than the diameter of bar nor less than
10 mm
15 mm
25 mm
13 mm
Q.16
For a longitudinal reinforcing bar in a column, the minimum cover shall neither be less than the diameter of bar nor less than
15 mm
25 mm
30 mm
40 mm
Q.17
Poisson’s ratio for concrete
remains constant
increases with richer mixes
decreases with richer mixes
none of the above
Q.18
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
Q.19
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
Q.20
A T-shaped retaining wall mainly conssits of
one cantilever
two cantilevers
three cantilevers
four cantilevers
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