Item 311
Concrete Knowledge Quiz
Test your knowledge of concrete properties and construction practices with our comprehensive quiz designed for professionals and enthusiasts alike.
Challenge yourself with 10 questions covering topics such as:
- Concrete properties
- Mix designs
- Quality control mechanisms
What property of concrete is adversely affected by air-entrainment admixture?
Consistency
Watertightness
Workability
Strength
Durability
Cold joint is constructed when there is an interruption of __________ in the concreting operation.
60 min.
45 min.
30 min.
90 min.
The maximum size of coarse aggregates to be used in Item 311.
25 mm, Grading “B”
50 mm, Grading “C”
75 mm, Grading “A”
63 mm, Grading “D”
What is the primary Quality Control / Mechanism for the production of concrete mixture?
Type of cement
Design Mix
Job-Mix formula
Flexural Strength
Admixtures
Slump test is a very important test in fresh concrete to determine __________?
Quality of concrete
Consistency
Workability
Durability
Consistency and Workability
Workability and Durability
Concrete beam sample when tested by Third-Point Method shall have a flexural strength of __________ when tested @ 14 days. (Mpa)
4.5
4.8
3.8
3.5
If slag is used as coarse aggregate in Item 311, the minimum density is __________.
1140 kg/m3
1220 kg/m3
1120 kg/m3
1210kg/m3
The diameter of Wire Mesh in lateral and longitudinal directions shall not be less than __________ and the weight shall not be less than __________.
6.5 mm, 3 kg/m2
7.0 mm, 3.10kg/m2
6.0 mm, 3 kg/m2
7.5 mm, 4 kg/m2
If the concrete pavement is well cured at any particular age, the most important single factor affecting the strength is __________.
Cement factor
The well-graded aggregates
Water-cement ratio
Non-provision of admixtures
Curing
The concrete in the area represented by the cores will be considered adequate if the average strength of the cores is equal to at least _____ of the specified strength, and if no single core is less than _____ of the specified strength.
80%, 70%
85%, 70%
85%, 75%
80%, 75%
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