Increase in water-cement ratio
Increase in fineness of cement
Decrease in curing time
Decrease in size of aggregate
B. Increase in fineness of cement
Construction joints are necessarily planned for their locations
Expansion joints are provided to accommodate thermal expansion
Construction joints are provided to control shrinkage cracks
All the above
Consistency
Compressive strength
Tensile strength
Impact value
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
Space between the exterior walls of a warehouse and bag piles should be 30 cm
Cement bags should preferably be piled on wooden planks
Width and height of the pile should not exceed 3 m and 2.70 m respectively
None of these
Volume stability
Strength
Water resistance
All the above
1.5
2.0
2.5
3.0
Balanced beam
Under-reinforced beam
Over-reinforced beam
None of the above
15,900 litres
16,900 litres
17,900 litres
18,900 litres
8 kg
10 kg
12 kg
14 kg
20 %
25 %
30 %
35 %
Flexural tensile strength
Direct tensile strength
Compressive strength
Split tensile strength
Is always less than 1
Is always greater than 1
Can be more than 1
Can be less than 1
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
Decrease in early strength
Reduction in chemical action with sulphates
Increase in shrinkage
All the above
10 kg
20 kg
30 kg
50 kg
There will be no settlement of columns
There will be no differential settlement
The settlement of exterior columns will be more than interior columns
The settlement of interior columns will be more than exterior columns
Less than 1
Between 1 and 1.5
Between 1.5 and 2
Greater than 2
15 mm
25 mm
30 mm
40 mm
15 mm
20 mm
25 mm
50 mm
Colorcrete
Silvicrete
Snowcem
All the above
To eliminate air holes
To achieve maximum density
To provide intimate contact between the concrete and embedded materials
All the above
Admixtures accelerate hydration
Admixtures make concrete water proof
Admixtures make concrete acid proof
Admixtures give high strength
0.43 d
0.55 d
0.68 d
0.85 d
Insufficient quantity of water makes the concrete mix harsh
Insufficient quantity of water makes the concrete unworkable
Excess quantity of water makes the concrete segregated
All the above
1 : 2 : 4
1 : 3 : 6
1 : 1 ½ : 3
1 : 1 : 2
Fineness test
Consistency test
Test for setting time
Test for tensile strength
4.75 mm
30 mm
60 mm
75 mm
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
2.5 cm
5.0 cm
7.5 cm
10 cm
Construction joints in columns are provided a few cm below the junction of beam
Construction joints in columns are provided at the bottom hunching
Construction joints in beams and slabs are provided within middle third
All the above