100 kg/cm2
150 kg/cm2
200 kg/cm2
250 kg/cm2
B. 150 kg/cm2
Increases the strength of concrete
Decreases the strength of concrete
Has no effect on the strength of concrete
None of these
Is always less than 1
Is always greater than 1
Can be more than 1
Can be less than 1
20 kN/cm²
200 kN/cm²
200 kN/mm²
2 × 106 N/cm²
5 %
10 %
15 %
20 %
2
4
6
8
Dams
Massive foundations
R.C.C. structures
All the above
Increasing the depth of beam
Using thinner bars but more in number
Using thicker bars but less in number
Providing vertical stirrups
Front face only
Inner face only
Both front face and inner face
None of the above
Thorough mixing of concrete is required
Proper compaction of concrete is required
Proper curing of concrete is required
All the above
The quality of water governs the strength of concrete
10% excess of water reduces the strength of concrete by 15%
30% excess of water reduces the strength of concrete by 50%
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
M 100
M 200
M 300
M 500
Residual does not exceed 10% when sieved through IS Sieve No. 9
Soundness varies from 5 to 10 mm
Initial setting time is not less than 30 minutes
Compressive stress after 7 days, is not less than 175 kg/cm2
Grading
Curing
Mixing
Batching
Long line method
Freyssinet system
Magnel-Blaton system
Lee-Macall system
Rounded spherical
Irregular
Flaky
None of these
Portland-pozzolana cement
Quick setting cement
Low heat Portland cement
Rapid hardening cement
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
The front face in one direction
The front face in both directions
The inner face in one direction
The inner face in both directions
0.207 l
0.293 l
0.707 l
0.793 l From the driving end of pile which rests on the ground
20 %
25 %
30 %
35 %
Are provided where plane changes abruptly
Are provided to ensure minimum resistance
Do not carry reinforcement across them
All the above
Screeding
Floating
Trowelling
Finishing
Higher initial setting time but lower final setting time
Lower initial setting time but higher final setting time
Higher initial and final setting times
Lower initial and final setting times
30 %
40 %
50 %
60 %
Less than 12
Less than 18
Between 18 and 24
More than 24
0.003
0.0003
0.00003
0.03
23°C
0°
- 5.6°C
- 11.7°C
Sand stone
Slate
Lime stone
Graphite
Shape
Grading
Compaction
All the above