2.5 cm
5.0 cm
7.5 cm
10 cm
B. 5.0 cm
Reduces workability
Increases bleeding
Increases shrinkage
Increases strength
3 days
7 days
21 days
28 days
When one thrusts one's hand into a bag of cement, one should feel warm
The colour of the cement is bluish
By rubbing cement in between fingers, one should feed rough
All the above
1 : 1 : 2
1 : 2 : 4
1 : 3 : 6
1 : 4 : 10
1100° and 1200°C
1200° and 1300°C
1300° and 1400°C
1400° and 1500°C
Lime stone
Chalk
Laterite
None of these
Fly ash
Hydrated lime
Calcium chloride
All the above
Expands
Mix
Shrinks
None of these
Colorcrete
Silvicrete
Snowcem
All the above
Cement should be mixed for at least one minute
10% of water is placed in the rotating drum before adding dry material
10% of water is added after placing the other ingredients in the drum
All the above
Increases workability
Decreases workability
Decreases resistance to weathering
Increases strength
10 mm
15 mm
25 mm
13 mm
Pans
Wheel borrows
Containers
Pumps
Calcium chloride acts as a retarder
Calcium chloride acts as an accelerator
Gypsum (calcium sulphate) acts as a retarder
Both (b) and (c)
Higher compressive strength of concrete
Lower compressive strength of concrete
Higher tensile strength of steel
Lower tensile strength of steel
50 mm
75 mm
100 mm
120 mm
30 %
40 %
50 %
60 %
Segregation is necessary for a workable concrete
Consistency does not affect the workability of concrete
If the concrete mix is dry, the slump is maximum
None of these
Course
Medium
Medium to fine
Fine
Colour
Strength
Controlling setting time
None of these
20 %
25 %
30 %
35 %
Rounded
Elongated
Angular
All of the above
With passage of time, the strength of cement increases
With passage of time, the strength of cement decreases
After a period of 24 months, the strength of cement reduces to 50%
The concrete made with storage deteriorated cement, gains strength with time
20 times
25 times
30 times
50 times
The free water is the amount of water added while mixing and the amount of water held on the surface of the aggregates prior to mixing
The total water is the free water and the amount actually absorbed by the aggregates
Neither (a) nor (b)
Both (a) and (b)
Flexural tensile strength
Direct tensile strength
Compressive strength
Split tensile strength
Size and shape of aggregates
Specific gravity of aggregates
Grading of aggregates
Size and shape of the container
100 cm
125 cm
150 cm
200 cm
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
Reduces the strength
Increases the strength
Does not change the strength
All of the above