Structural Design Online Test – Paper 3

1. The ratio of effective length of a column which is fixed at both ends to the distance between the supports is about

2. In a slab, the pitch of the main reinforcement should not exceed its effective depth

3. Shear in a concrete beam is caused by

4. Concrete gains strength due to

5. The limits of the percentage of the longitudinal reinforcement in a column are given by

6. Distribution reinforcement in a simply supported slab is provided to distribute

7. The ratio of modulus of elasticity of steel to that of concrete is

8. Bottom reinforcement in a beam is subjected to

9. As the size of the cube increases, the strength of the cube

10. The long column takes a lesser load as compared to a short column due to

11. Large size aggregate is better in yield high strength but in no case greater than

12. In a singly reinforced beam, if the concrete is stressed to its allowable limit earlier than steel, the section is said to be

13. Which of the following factors influence the strength of concrete?

14. Factor of safety is given by

15. The maximum reinforcement in a column to consider the practical problem is

16. Generally, the compressive strength of the cover block is more than the compressive strength of the concrete. The main function of the cover block is

17. As per IS: 456, the column is considered as a short column if its slenderness ratio is more than

18. The effective span of a simply supported slab is

19. Shrinkage in concrete increases its

20. The maximum ratio of span to depth ratio of a slab simply supported and spanning in one direction is

21. After casting, an ordinary cement concrete on drying

22. For an RCC section, select the most true statement from the following

23. Fineness modulus of fine aggregate is between

24. In an over-reinforced concrete section, the failure starts at

25. An air entraining agent when added in concrete improves

26. The neutral axis of a T-beam exists

27. In R.C.C. beams, the tension reinforcement can be cut off at a point when it is no longer needed if

28. Buckling occurs in a column

29. The beam section is redesigned if the shear stress exceeds the allowable shear stress by ... times

30. The radius of bar bend to form a hook should not be less than

31. The cover provided in the column having size less than 200 mm x 200 mm is

32. A doubly reinforced beam is used

33. Surface vibrator is effective only when the thickness of concrete does not exceed

34. The shear reinforcement in an RCC beam is provided to resist

35. Weep holes are provided in retaining and breast walls to

36. In the case of the foundation of rigid base, the distribution pressure on the soil is

37. Strength of concrete increases with

38. A rib slab is provided for

39. The workability of concrete is directly proportional to

40. The quantity of coarse aggregate required in 100 m³ of concrete having mix 1:2:4

41. The enlarged head of a supporting column of a flat slab is technically known as

42. For a continuous slab of 3m x 3.5m size, the minimum overall depth of the slab to satisfy vertical deflection limit is

43. The slenderness ratio of an RCC column is given by (Where, r=radius of gyration, l=effective length, B=width, D=diameter)

44. The main reason for providing a number supported beam is to resist in that zone

45. The minimum thickness of the cover at the end of a reinforcing bar should be twice the diameter of the bar, subjected to a minimum of

46. In R.C.C. works, the proportion of the mixture 1:1.5:3, the volume of the cement is in

47. Main reinforcement in an RCC beam is used for

48. The maximum strain in the tension reinforcement in the section of a flexural member at failure shall not be less than (if fy is the characteristic strength of steel and Es is the modulus of elasticity of steel)

49. If A is the fineness modulus of coarse aggregate, B of combined aggregates, and C of fine aggregates, then P the proportion of fine to combined aggregates, is given by

50. If the thickness of the slab is 100 mm then the maximum diameter of the bar placed in the slab should be