1 %
2 %
3 %
5 %
D. 5 %
Screeding
Floating
Trowelling
Finishing
Hydrates rapidly
Generates less heat of hydration
Hardens rapidly
Provides less ultimate strength to cement
Length 30 cm, breadth 25 cm, height 30 cm
Length 39 cm, breadth 25 cm, height 32 cm
Length 27 cm, breadth 27 cm, height 48 cm
Length 220 cm, breadth 25 cm, height 40 cm
Shales
Fly ash
Pumicite
All the above
Lime stone and clay
Gypsum and lime
Pozzolana
Lime, pozzolana and clay
L-shaped wall
T-shaped wall
Counterfort type
All of the above
Remains constant
Increases with richer mixes
Decreases with richer mixes
None of the above
100 kg/cm2
150 kg/cm2
200 kg/cm2
250 kg/cm2
Only (i)
Only (ii)
Both (i) and (iv)
Both (ii) and (iii)
24 to 48 hours
3 days
7 days
14 days
Membrane method
Ponding method
Covering surface with bags
Sprinkling water method
M 100
M 150
M 250
M 400
0.003
0.0003
0.00003
0.03
Proportions of the material and water should be the same as to be used at the work site
Cement should be mixed by hand in order to maintain uniformity
Concrete mix should be stored in air-tight containers
Concrete ingredients should be kept at a temperature of 37° ± 2°C
Higher workability indicates unexpected increase in the moisture content
Higher workability indicates deficiency of sand
If the concrete mix is dry, the slump is zero
All the above
Water cement ratio is reduced
Proportion of aggregates is reduced
An allowance for the entrained air is made
All the above
Compressive everywhere
Tensile everywhere
Partly compressive and partly tensile
Zero
The maximum size of a coarse aggregate, is 75 mm and minimum 4.75 mm
The maximum size of the fine aggregate, is 4.75 mm and minimum 0.075 mm
The material having particles of size varying from 0.06 mm to 0.002 mm, is known as silt
All the above
Cement
Aggregates
Water
All the above
Magnesium oxide
Iron oxide
Silica
Lime
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)
M 100
M 150
M 200
M 250
Both A and R is true and R is the correct explanation of A
Both A and R is true but R is not the correct explanation of A
A is true but R is false
A is false but R is true
Reacts fast with water
Generates less heat of hydration
Causes initial setting and early strength of cement
Does not contribute to develop ultimate strength
(i) and (ii)
(ii) and (iii)
Only (iii)
All (i), (ii) and (iii)
Sand obtained from pits, is washed to remove clay and silt
Sand obtained from flooded pits, need not be washed before use
The chloride in sea shore sand and shingle may cause corrosion of reinforcement if the concrete is porous
All the above
100 cm
125 cm
150 cm
200 cm
Fineness test
Consistency test
Test for setting time
Test for tensile strength
More than or equal to one fourth of diameter of main bar
More than or equal to 5 mm
More than 5 mm but less than one-fourth of diameter of main bar
More than 5 mm and also more than one-fourth of diameter of main bar
Air-entraining agent
Foaming agent
Oily-agent
All the above