Rounded aggregate
Irregular aggregate
Angular aggregate
Flaky aggregate
A. Rounded aggregate
Zone I
Zone II
Zone III
Zone IV
Time of transit
Water-cement ratio
The air in the mix
Size of aggregate
Elastic modulus of high tensile steel is nearly the same as that of mild steel
Elastic modulus of high tensile steel is more than that of mild steel
Carbon percentage in high carbon steel is less than that in mild steel
High tensile steel is cheaper than mild steel
The loss of pre-stress is more in pre-tensioning system than in posttensioning system.
Pre-tensioning system has greater certainty about its durability.
For heavy loads and large spans in buildings or bridges, posttensioning system is cheaper than pre-tensioning system
None of the above
Dead load only
Dead load + live load
Dead load + fraction of live load
Live load + fraction of dead load
Lime in excess, causes the cement to expand and disintegrate
Silica in excess, causes the cement to set slowly
Alumina in excess, reduces the strength of the cement
All the above
5% by weight of aggregates plus 20% of weight of cement
10% by weight of aggregates plus 10% of weight of cement
5% by weight of aggregates plus 30% of weight of cement
30% by weight of aggregates plus 10% of weight of cement
Balanced beam
Under-reinforced beam
Over-reinforced beam
None of 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
6 mm
8 mm
12 mm
16 mm
Water cement ratio
Workability
Grading of aggregate
Fineness modulus
Is maximum at neutral axis
Decreases below the neutral axis and increases above the neutral axis
Increases below the neutral axis and decreases above the neutral axis
Remains same
Dams
Massive foundations
R.C.C. structures
All the above
Not provided
Provided only on inner face
Provided only on front face
Provided both on inner and front faces
Bleeding
Creeping
Segregation
Shrinkage
Mixing of different sizes of sand particles
Mixing of lime with sand
Maximum water with sand
Swelling of sand when wetted
Ordinary Portland cement
Rapid hardening cement
Low heat cement
Blast furnace slag cement
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
Depends upon the amount of water used in the mix
Does not depend upon the quality of cement mixed with aggregates
Does not depend upon the quantity of cement mixed with aggregates
All the above
4.5
5.5
6.5
7.5
Density
Strength
Durability
All the above
Single size coarse aggregate is roughly 0.45
Graded coarse aggregate is roughly 0.040
Fine aggregate is roughly 0.45
All the above
Compressive everywhere
Tensile everywhere
Partly compressive and partly tensile
Zero
Expands
Mix
Shrinks
None of these
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
0.33
0.5
0.75
1.0
Not needed
Provided equally on inner and front faces
Provided more on inner face than on front face
Provided more on front face than on inner face
Increased by 10% for bars in compression
Increased by 25% for bars in compression
Decreased by 10% for bars in compression
Decreased by 25% for bars in compression
In properly graded aggregates, bulk density is more
In single size aggregates, bulk density is least
In single size aggregates, bulk density is maximum
None of these
Magnesium oxide
Iron oxide
Alumina
Lime