Civil Engineering - Concrete Technology
Exercise :: Concrete Technology - Section 4
| 36. |
Pick up the incorrect statement from the following: |
| A. |
Tricalcium silicate (C3S) hydrates rapidly | | B. |
Tricalcium silicate (C3S) generates more heat of hydration | | C. |
Tricalcium silicate (C3S) develops early strength | | D. |
Tricalcium silicate (C3S) has more resistance to sulphate attack | | E. |
None of these. |
Answer: Option D
Explanation:
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| 37. |
Permissible compressive strength of M 200 concrete grade is |
| A. |
100 kg/cm2 | | B. |
150 kg/cm2 | | C. |
200 kg/cm2 | | D. |
250 kg/cm2 | | E. |
300 kg/cm2 |
Answer: Option C
Explanation:
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| 38. |
In slump test, each layer of concrete is compacted by a steel rod 60 cm long and of 16 mm diameter for |
| A. |
20 times | | B. |
25 times | | C. |
30 times | | D. |
40 times | | E. |
50 times |
Answer: Option B
Explanation:
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| 39. |
If the average compressive strength is 4000 kg/cm2 and standard deviation is 500, the co-efficient of variation is |
Answer: Option B
Explanation:
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| 40. |
For preparing ordinary concrete, the quantity of water used, is |
| A. |
5% by weight of aggregates plus 20% of weight of cement | | B. |
10% by weight of aggregates plus 10% of weight of cement | | C. |
5% by weight of aggregates plus 30% of weight of cement | | D. |
30% by weight of aggregates plus 10% of weight of cement | | E. |
none of these. |
Answer: Option C
Explanation:
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