Water
Cement
Aggregate
None of these
C. Aggregate
Air-entraining agent
Foaming agent
Oily-agent
All the above
Weakness of concrete
Excessive laitance
Segregation
All the above
Volume stability
Strength
Water resistance
All the above
Wetter mix
Larger proportion of maximum size aggregate
Coarser grading
All the above
Water enables chemical reaction to take place with cement
Water lubricates the mixture of gravel, sand and cement
Strength of concrete structure largely depends upon its workability
All the above
2/3 mean dimension
3/4 mean dimension
3/5 mean dimension
5/8 mean dimension
Increasing the depth of beam
Using thinner bars but more in number
Using thicker bars but less in number
Providing vertical stirrups
1.5
2.0
2.5
3.0
Wholly parabolic
Wholly rectangular
Parabolic above neutral axis and rectangular below neutral axis
Rectangular above neutral axis and parabolic below neutral axis
Less than 1
Between 1 and 1.5
Between 1.5 and 2
Greater than 2
The degree of grinding of cement, is called fineness
The process of changing cement paste into hard mass, is known as setting of cement
The phenomenon by virtue of which cement does not allow transmission of sound, is known as soundness of cement
The heat generated during chemical reaction of cement with water, is known as heat of hydration
Smooth
Granular
Glassy
Honey combed and porous
Shear strength
Tensile strength
Compressive strength
None of these
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
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
Volume of water to that of cement
Weight of water to that of cement
Weight of concrete to that of water
Both (a) and (b) of the above
Has strength less than 10% to 15%
Has more resistance to weathering
Is more plastic and workable
Is free from segregation and bleeding
fcr - fcs = fcl
fcr > fcs > fcl
fcr < fcs < fcl
fcs > fcr > fcl
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
A highly absorptive aggregate reduces the workability of concrete considerably
The specific gravity of aggregate is important for the determination of the moisture content
The absorption and porosity of an aggregate influence the property of the concrete
All the above
0.33
0.5
0.75
1.0
Plain hot rolled wires
Cold drawn wires
Heat treated rolled wires
All have same tensile strength
5 %
10 %
15 %
20 %
Membrane method
Ponding method
Covering surface with bags
Sprinkling water method
Has a definite yield point
Does not show definite yield point but yield point is defined by 0.1% proof stress
Does not show definite yield point but yield point is defined by 0.2% proof stress
Does not show definite yield point but yield point is defined by 2% proof stress,
Portland-pozzolana cement
Quick setting cement
Low heat Portland cement
Rapid hardening cement
Shales
Fly ash
Pumicite
All the above
Density
Strength
Durability
All the above
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
Roads
Retaining walls
Lining of canals
All the above