Concrete Technology Part 1

January 21, 2020

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1. The property of fresh concrete, in which the water in the mix tends to rise to the surface while placing and compacting, is called
2. The strength of concrete after one year as compared to 28 days strength is about
3. The percentage of water for making a cement paste of normal consistency varies from
4. A concrete cube of 15 cm and a cylinder of 150 mm diameter and 300 mm height are tested for compressive strength, the strength of the cube compared to cylinder will be
5. The cement concrete, from which entrained air and excess water are removed after placing it in position, is called
6. The setting time of cement is the governing factor for
7. The failure strain of concrete under direct compression and under flexure are respectively
8. Workability of concrete is inversely proportional to
9. According to IS 456, under normal circumstances, the maximum cement content in kg/cum (including fly ash and slag) allowed
10. The strength of concrete using air entraining cement gets reduced by
11. According to IS: 269-1976, the requirement of an ordinary Portland cement is that
12. Tensile strength of concrete is approximately______________of the compressive strength of concrete.
13. Approximate value of shrinkage strain in concrete is
14. The degree of grinding of cement is called
15. The compressive strength of an ordinary Portland cement (1:3 cement mortar cube) after 7 days test should not be less than
16. Tensile strength of concrete is measured by
17. The phenomenon by virtue of which the cement does not undergo large change in volume when treated with water is known as
18. The chemical reaction between cement and water is
19. The cement, widely used in retaining walls is
20. As the cube size increases, the strength of concrete
21. Modulus of rupture of concrete gives
22. The fineness of cement is measured in terms of
23. The ratio of 7 days and 28 days cube strength is
24. The property of the ingredients to separate from each other while placing the concrete is called
25. The aggregate is said to be elongated when
26. Too much fineness of cement
27. The resistance of an aggregate to wear is known as
28. The binding material in the mortar is also called   [ SSC JE 2019]
29. Strength of concrete increases with
30. Workability of concrete is directly proportional to
31. The removal of excess air after placing concrete helps in increasing the strength of concrete by
32. Strength of commonly used concrete for constructing low rise residential buildings is
33. Increase in moisture content in concrete
34. The resistance of an aggregate to the effect of hydration of cement and weather is called
35. Which of the following cement is expected to have the highest compressive strength after 3 days?

 

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A Demrot is the founder of VideRime Online Learning, a leading engineering website. He did his BE Civil and M.Tech Structure from RGPV University, Bhopal and has been working as an Assistant Professor in a reputed college.

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