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Civil Engineering - Concrete Technology

Exercise : Concrete Technology - Section 2
31.
Pick up the correct statement from the following:
Segregation is necessary for a workable concrete
Consistency does not affect the workability of concrete
If the slump increases, workability decreases
If the concrete mix is dry, the slump is maximum
None of these.
Answer: Option
Explanation:
No answer description is available. Let's discuss.
32.
Specified compressive strengh of concrete is obtained from cube tests at the end of
3 days
7 days
14 days
21 days
28 days.
Answer: Option
Explanation:
No answer description is available. Let's discuss.
33.
An aggregate is said to be flaky, if its least dimension is less than
2/3 mean dimension
3/4 mean dimension
3/5 mean dimension
5/8 mean dimension
none of these.
Answer: Option
Explanation:
No answer description is available. Let's discuss.
34.
Pick up the incorrect statement from the following:
A rich mix of concrete possesses higher strength than that a lean mix of desired workability with excessive equantity of water
The strength of concrete decreases as the water cement ratio increases
If the water cement ratio is less than 0.45, the concrete is not workable and causes honey-combed structure
Good compaction by mechanical vibrtions, increases the strength of concrete
None of these.
Answer: Option
Explanation:
No answer description is available. Let's discuss.
35.
The percentage of the aggregate of F.M. 2.6 to be combined with coarse aggregate of F.M. 6.8 for obtaining the aggregates of F.M. 5.4, is
30%
40%
50%
60%.
Answer: Option
Explanation:
No answer description is available. Let's discuss.
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