5% by weight of aggregates plus 20% of weight of cement
10% by weight of aggregates plus 10% of weight of cement
5% by weight of aggregates plus 30% of weight of cement
30% by weight of aggregates plus 10% of weight of cement
C. 5% by weight of aggregates plus 30% of weight of cement
Air-entraining agent
Foaming agent
Oily-agent
All the above
Effective depth of slab from periphery of column/drop panel
d/2 from periphery of column/capital/ drop panel
At the drop panel of slab
At the periphery of column
The weight of ingredients of concrete mix, is taken in kilograms
Water and aggregates are measured in litres
20 bags of cement make one tonne
All the above
Increases workability
Decreases workability
Decreases resistance to weathering
Increases strength
5 kg/cm2
8 kg/cm2
10 kg/cm2
15 kg/cm2
wR / 4d
wR/2d
wR/d
2wR/d Where, w = load per unit area of surface of dome R = radius of curvature d = thickness of dome
Lime in excess, causes the cement to expand and disintegrate
Silica in excess, causes the cement to set slowly
Alumina in excess, reduces the strength of the cement
All the above
Where B.M. and S.F. are small
Where the member is supported by other member
At 18 m apart in huge structures
All the above
2 %
4 %
6 %
10 %
A horizontal line
A vertical line
N.W. inclined line
N.E. inclined line
Single size coarse aggregate is roughly 0.45
Graded coarse aggregate is roughly 0.040
Fine aggregate is roughly 0.45
All the above
Front face only
Inner face only
Both front face and inner face
None of the above
0.43 d
0.55 d
0.68 d
0.85 d
0.367 xu
0.416 xu
0.446 xu
0.573 xu
Tensile strength test
Slump test
Compaction factor test
Flexural strength test
The least lateral dimension
2 times the least lateral dimension
3 times the least lateral dimension
4 times the least lateral dimension
Workability admixtures
Accelerators
Retarders
Air entraining agents
10 to 15% more
15 to 20% more
20 to 25% more
25 to 50% more
100 kg/cm2
150 kg/cm2
200 kg/cm2
250 kg/cm2
Segregation
Compaction
Shrinkage
Bulking
5 %
10 %
15 %
20 %
Internal moisture conditions on hydration continue till complete strength is gained
Concrete specimens may be tested at any temperature
Concrete specimens need be of same age
Concrete specimens need be of same size
The front face in one direction
The front face in both directions
The inner face in one direction
The inner face in both directions
Bleeding
Creeping
Segregation
Shrinkage
(i) and (ii)
(i)and(iv)
(ii) and (iii)
(iii) and (iv)
Colorcrete
Silvicrete
Snowcem
All the above
Steel and concrete are same
Steel is lower than that for concrete
Steel is higher than that for concrete
None of the above
Minimum cross sectional area of longitudinal reinforcement in a column is 0.8%
Spacing of longitudinal bars measured along the periphery of column should not exceed 300 mm
Reinforcing bars in a column should not be less than 12 mm in diameter
The number of longitudinal bars provided in a circular column should not be less than four
Ferrous sulphate
Potassium chloride
Ammonia
Nitric acid
Decrease in early strength
Reduction in chemical action with sulphates
Increase in shrinkage
All the above