Voids in coarse aggregates are filled by fine aggregates
Voids in fine aggregates are filled by the cement paste
Volume of fine aggregates is equal to total voids in coarse aggregates plus 10% extra
All the above
D. All the above
Colour
Strength
Controlling setting time
None of these
Siliceous aggregates, has higher co-efficient of expansion
Igneous aggregates, has intermediate coefficient of expansion
Lime stones, has lowest co-efficient of expansion
All the above
Area of each aggregate pile should be large
Height of each aggregate pile should not exceed 1.50 m
Aggregate pile should be left for 24 hours before aggregates are used
All the above
The quality of water governs the strength of concrete
10% excess of water reduces the strength of concrete by 15%
30% excess of water reduces the strength of concrete by 50%
All the above
Decrease in tensile strength but increase in ductility
Increase in tensile strength but decrease in ductility
Decrease in both tensile strength and ductility
Increase in both tensile strength and ductility
Water enables chemical reaction to take place with cement
Water lubricates the mixture of gravel, sand and cement
Strength of concrete structure largely depends upon its workability
All the above
Ordinary Portland cement
Rapid hardening cement
Low heat cement
Blast furnace slag cement
Extremely low
Very low
Low
High
18
30
40
58
Balanced beam
Under-reinforced beam
Over-reinforced beam
None of the above
Economy
Durability
Workability
All the above
Bleeding
Creeping
Segregation
Shrinkage
Continuous grading is not necessary for obtaining a minimum of air voids
The omission of a certain size of aggregate is shown by a straight horizontal line on the grading curve
The omission of a certain size of aggregate in concrete increases the workability but also increases the liability to segregation
All the above
Thin particles
Flat particles
Elongated particles
All the above
1 : 3 : 6
1 : 2 : 4
1 : 1 ½ : 3
1 : 4 : 8
Sodium sulphates
Sodium chlorides
Sodium carbonates and bicarbonates
Calcium bicarbonates
A horizontal line
A vertical line
N.W. inclined line
N.E. inclined line
5 %
10 %
15 %
20 %
Voids in coarse aggregates are filled by fine aggregates
Voids in fine aggregates are filled by the cement paste
Volume of fine aggregates is equal to total voids in coarse aggregates plus 10% extra
All the above
Only in post-tensioned beams
Only in pre-tensioned beams
In both post-tensioned and pre-tensioned beams
None of the above
28 liters
30 liters
32 liters
34 liters
Dead load only
Dead load + live load
Dead load + fraction of live load
Live load + fraction of dead load
Bending moment and shear
Bending moment and torsion
Shear and torsion
Bending moment, shear and torsion
Dams
Massive foundations
R.C.C. structures
All the above
Soffit level
Window sill level
Floor level
All the above
Ordinary Portland cement
Rapid hardening cement
Low heat cement
Blast furnace slag cement
Bulking of sand is caused due to formation of a thin film of surface moisture
Fine sand bulks more than coarse sand
The volume of fully saturated sand, is equal to the volume of dry and loose sand
All the above
Workability admixtures
Accelerators
Retarders
Air entraining agents
Water content and its temperature
Shape and size of the aggregates
Air entraining agents
All the above
Reduces the shrinkage of concrete
Preserves the properties of concrete
Prevents the loss of water by evaporation
All of the above