0.75 - 0.80
0.80 - 0.85
0.85 - 0.92
Above 0.92
D. Above 0.92
0.37 fy
0.57 fy
0.67 fy
0.87 fy
Smaller creep and shrinkage
Greater density and smaller permeability
Improved frost resistance
All the above
3
4
5
7
Increases the strength of concrete
Decreases the strength of concrete
Has no effect on the strength of concrete
None of these
100 kg/cm2
150 kg/cm2
200 kg/cm2
250 kg/cm2
1 : 3 : 6 mix
1 : 1 : 2 mix
1 : 2 : 4 mix
1 : 1.5 : 3 mix
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
Plain hot rolled wires
Cold drawn wires
Heat treated rolled wires
All have same tensile strength
Compressive and tensile
Tensile and compressive
Both compressive
Both tensile
600 mm
750 mm
900 mm
More than 1 m
1/5th of mean dimension
2/5th of mean dimension
3/5th of mean dimension
4/5th of mean dimension
1 : 3 : 6
1 : 1 ½ : 3
1 : 2 : 4
1 : 1 : 2
Only (i)
(i) and (ii)
(i) and (iii)
All (i), (ii) and (iii)
To eliminate air holes
To achieve maximum density
To provide intimate contact between the concrete and embedded materials
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
Moist aggregates
Very dry aggregates
Dry aggregates
Saturated surface dry aggregate
4 mm
6 mm
8 mm
10 mm
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
10 %
12 %
15 %
25 %
20 %
25 %
30 %
35 %
2.5 cm
5.0 cm
7.5 cm
10 cm
0
10
20
30
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
A rich mix of concrete possesses higher strength than that a lean mix of desired workability with excessive quantity of water
The strength of concrete decreases as the water cement ratio increases
Good compaction by mechanical vibrations, increases the strength of concrete
None of these
Decreases the workability
Increases the quantity of water and sand
More than 15% are not desirable
All the above
Colorcrete
Silvicrete
Snowcem
All the above
Equal to the mean size
Twice the mean size
Thrice the mean size
Four times the mean size
5 % less
10 % less
5 % more
10 % more
10 %
20 %
30 %
40 %
Bending moment and shear
Bending moment and torsion
Shear and torsion
Bending moment, shear and torsion