Civil Engineering - Concrete Technology
Exercise :: Concrete Technology - Section 1
| 16. |
The maximum amount of dust which may be permitted in aggregates is |
| A. |
5% of the total aggregates for low workability with a coarse grading | | B. |
10% of the total aggregates for low workability with a fine grading | | C. |
20% of the total aggregates for a mix having high workability with fine grading | | D. |
all the above. |
Answer: Option D
Explanation:
|
| 17. |
Proper proportioning of concrete, ensures |
| A. |
desired strength and workability | | B. |
desired durability | | C. |
water tightness of the structure | | D. |
resistance to water | | E. |
all the above. |
Answer: Option E
Explanation:
|
| 18. |
The bulk density of aggregates does not depend upon : |
| A. |
size and shape of aggregates | | B. |
specific gravity of aggregates | | C. |
grading of aggregates | | D. |
size and shape of the container | | E. |
none of these. |
Answer: Option D
Explanation:
|
| 19. |
Curing |
| A. |
reduces the shrinkage of concrete | | B. |
preserves the properties of concrete | | C. |
prevents the loss of water by evaporation | | D. |
all of the above. |
Answer: Option D
Explanation:
|
| 20. |
While compacting the concrete by a mechanical vibrator, the slump should not exceed |
Answer: Option B
Explanation:
|
