Has strength less than 10% to 15%
Has more resistance to weathering
Is more plastic and workable
Is free from segregation and bleeding
C. Is more plastic and workable
0.75 - 0.80
0.80 - 0.85
0.85 - 0.92
Above 0.92
Top face perpendicular to wall
Bottom face perpendicular to wall
Both top and bottom faces perpendicular to wall
None of the above
Construction joints are necessarily planned for their locations
Expansion joints are provided to accommodate thermal expansion
Construction joints are provided to control shrinkage cracks
All the above
Weight 50 kg
Height 18 cm
Plan area 3000 sq. cm
All the above
1100° and 1200°C
1200° and 1300°C
1300° and 1400°C
1400° and 1500°C
0.15% to 2%
0.8% to 4%
0.8% to 6%
0.8% to 8%
35 MPa and 42 MPa
42 MPa and 35 MPa
42 MPa and 53 MPa
53 MPa and 42 MPa
Rounded
Elongated
Angular
All of the above
100 cm
125 cm
150 cm
200 cm
1 : 2 : 4
1 : 3 : 6
1 : 1 ½ : 3
1 : 1 : 2
The front face in one direction
The front face in both directions
The inner face in one direction
The inner face in both directions
Internal vibrator
Screed vibrator
Form vibrator
None of these
Bending moment is small
Shear force is small
The member is supported by other member
All the above
Rounded spherical
Irregular
Flaky
None of these
1 : 3 : 6 mix
1 : 1 : 2 mix
1 : 2 : 4 mix
1 : 1.5 : 3 mix
100 kg/cm2
150 kg/cm2
200 kg/cm2
250 kg/cm2
15 mm
20 mm
25 mm
50 mm
An increase in water content must be accompanied by an increase in cement content
Angular and rough aggregates reduce the workability of the concrete
The slump of the concrete mix decreases due to an increase in temperature
All the above
± 5 % of average
± 10 % of average
± 15 % of average
± 20 % of average
23°C
0°
- 5.6°C
- 11.7°C
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
Screeding
Floating
Trowelling
Finishing
Magnesium oxide
Iron oxide
Silica
Lime
Only (i)
(i) and (ii)
(i) and (iii)
All (i), (ii) and (iii)
Low-heat Portland cement
Rapid hardening Portland cement
Portland blast slag cement
Portland pozzolana cement
Thin particles
Flat particles
Elongated particles
All the above
Is always less than 1
Is always greater than 1
Can be more than 1
Can be less than 1
10 kg
20 kg
30 kg
50 kg
Segregation
Compaction
Shrinkage
Bulking
Moist aggregates
Very dry aggregates
Dry aggregates
Saturated surface dry aggregate