Zone I
Zone II
Zone III
Zone IV
A. Zone I
According to the petrological characteristics, concrete aggregates are classified as heavy weight, normal weight and light weight
According to the shape of the particles, concrete aggregates are classified as rounded irregular, angular and flaky
According to the surface texture of the particles, the concrete aggregates are classified as glassy, smooth, granular, rough, crystalline, honey combed and porous
All the above
1 %
2 %
3 %
5 %
Affects only the early development of strength
Affects only the ultimate strength
Both (A) and (B)
Does not affect the strength
Very fine sand
Fine sand
Medium sand
Coarse sand
Chemical reaction of cement with sand and coarse aggregates
Evaporation of water from concrete
Hydration of cement
All the above
Flexural tensile strength
Direct tensile strength
Compressive strength
Split tensile strength
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
Siliceous and argillaceous materials
Argillaceous and calcareous materials
Siliceous and calcareous materials
Siliceous, argillaceous and calcareous materials
Upper part of the beam
Lower part of the beam
Center
Anywhere
Only (i)
Only (ii)
Both (i) and (iv)
Both (ii) and (iii)
Screeding
Floating
Trowelling
Finishing
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
7 kg
14 kg
21 kg
35 kg
Balanced beam
Under-reinforced beam
Over-reinforced beam
None of the above
20 mm particles
10 mm particles
4.75 mm particles
All the above
Colorcrete
Silvicrete
Snowcem
All the above
Moist aggregates
Very dry aggregates
Dry aggregates
Saturated surface dry aggregate
Less than 1
Between 1 and 1.5
Between 1.5 and 2.0
Greater than 2
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
The bottom and top ends of slump mould are parallel to each other
The axis of the mould is perpendicular to the end faces
The internal surface of the mould is kept clean and free from set cement
The mould is in the form of a frustum of hexagonal pyramid
Expands
Mix
Shrinks
None of these
0.15
0.12
0.30
1.00
Granite
Magnetite
Barite
Volcanic scoria
2 %
4 %
6 %
10 %
Less water
Fine aggregates
Rich mix
More water and coarse aggregates
Sand stone
Slate
Lime stone
Graphite
0
10
20
30
10 kg
12 kg
14 kg
16 kg
3.5 m
4 m
4.5 m
5 m
fcr - fcs = fcl
fcr > fcs > fcl
fcr < fcs < fcl
fcs > fcr > fcl