Rapid rate during the first few days and afterwards it continues to increase at a decreased rate
Slow rate during the first few days and afterwards it continues to increase at a rapid rate
Uniform rate throughout its age
None of these
D. None of these
10 to 15% more
15 to 20% more
20 to 25% more
25 to 50% more
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
Fineness test
Consistency test
Setting time test
Soundness test
100 kg/cm2
150 kg/cm2
200 kg/cm2
250 kg/cm2
Shales
Fly ash
Pumicite
All the above
20.5 mm
30.5 mm
40.5 mm
50.5 mm
The concrete gains strength due to hydration of cement
The concrete does not set at freezing point
The strength of concrete increases with its age
All the above
Hydrates rapidly
Generates less heat of hydration
Hardens rapidly
Provides less ultimate strength to cement
7.30
7.35
7.40
7.45
Less than 12
Less than 18
Between 18 and 24
More than 24
100 kg/cm2
150 kg/cm2
200 kg/cm2
300 kg/cm2
Air-entraining agent
Foaming agent
Oily-agent
All the above
Consistency
Compressive strength
Tensile strength
Impact value
Less
More
Equal
None of the above
Forces of tension and compression change but lever arm remains unchanged
Forces of tension and compressions remain unchanged but lever arm changes with the moment
Both forces of tension and compression as well as lever arm change
Both forces of tension and compression as well as lever arm remain unchanged
100 kg
110 kg
120 kg
130 kg
22.5 mm
18.5 mm
16.5 mm
13.5 mm
1.5 and 2.2
2.2 and 1.5
1.5 and 1.5
2.2 and 2.2
Deflect downward
Deflect upward
Deflect downward or upward
None of the above
Dry
Earth moist
Semi-plastic
Plastic
Only in post-tensioned beams
Only in pre-tensioned beams
In both post-tensioned and pre-tensioned beams
None of the above
1 : 3 : 6 mix
1 : 1 : 2 mix
1 : 2 : 4 mix
1 : 1.5 : 3 mix
Portland-pozzolana cement
Quick setting cement
Low heat Portland cement
Rapid hardening cement
15 mm
20 mm
25 mm
50 mm
Course
Medium
Medium to fine
Fine
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
2 %
4 %
6 %
8 %
Granite
Magnetite
Barite
Volcanic scoria
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
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