Concrete Technology Part 1

January 21, 2020

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

 

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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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