1. Higher strength of cement is obtained by:
2. As per IS: 456, allowable pH value of water than can be used for making concrete is?
3. Which amongst the following is not a deleterious substance in Fine Aggregate?
4. The fineness of cement is specified by
5. Setting time of cement indicates
6. For a normal concrete, higher the impact value
7. Which cement is most sensitive to loss of strength on poor storage?
8. FA of Grading zone II of IS: 383 is
9. Plasticiser and water reducing agent are
10. The action of ggbs is
11. As per Indian Standard, sea water can be used for making
12. Maximum size of CA depends upon
13. Retarders are often used
14. Which amongst the following has the highest surface area
15. In a stockpile of coarse aggreagtes, which combination is likely to segregate the least?
16. Which is the most effective method of stockpiling aggregates to prevent segregation?
17. What type of damage / deterioration may take place in a stockpile of aggregates?
18. Water used for curing should be?
19. The moisture content in FA plays a vital role in
20. Compared to concrete made with only OPC, curing period required for concrete made with fly is?
21. What represents a bad practice with regard to compaction of concrete?
22. Why are cold joints formed?
23. The purpose of curing is to
24. A TM with low slump concrete reaches site1 Hr late on hot day. Next TM is not likely to reach for another hour. In such a case, you will
25. Curing is avoidable only in
26. As per IS, RMC without retarders can be accepted how long after mixing?
27. What is yield of concrete?
28. The speed of concrete pouring depends on?
29. To a reference mix, addition of which ingredient will lead to a longer mixing time?
30. For stiff concrete, most appropriate needle vibrator will have
31. Which combination of cement type and weather will require most prolonged curing of concrete??
32. Lowering w/c of concrete improves
33. A concrete pour is generally to be treated as mass concrete when
34. Durability of a concrete structure can be accurately measured by
35. Influence of type of CA on concrete's strength is more in concretes with
36. Which factor has the greatest influence on workability of concrete?
37. Which factor affects rate of gain of strength of concrete?
38. What is carbonation of concrete?
39. Concrete in pile cap of a bridge across a creek will have what exposure condition as per IS 456?
40. What has highest impact on shrinkage of concrete?
41. If sugar is added to the mix, it will?
42. Maturity of concrete is a function of
43. Effect of confining pressure on concrete is to cause?
44. Which is the most appropriate method to test the workability of concrete having high workabilty?
45. How is rate of loading cube related to failure load
46. As per IS:456, each sample of concrete should comprise of
47. How best can we ascertain the quality of compaction?
48. Correct measure of efficiency of a concrete mixer is?
49. Which amongst the following test provides information about concrete durability?
50. Strenth of concrete is supposed to follow which type of distribution?
51. Rebound hammer test measures which property of concrete?
52. UPV method measure which property of concrete?
53. In a wall/column the likelyhood of core strength is
54. Strength of dry cubes vis-à-vis wet cube is?
55. Three different factors each cause variation of SD=1 in cube strength.Their combined effect will result in SD of nearly
56. Use of Metakaoline in concrete is
57. For pumpability of concrete, which statement is true?
58. Which among the following concrete structure will require control of concrete temperature to avoid adverse effect of temperature rise??
59. Which method of transporting concrete is least likely to result in segregation of concrete?
60. Which among the following aspects affects durability of concrete?