SSC JE Exam - rcc design beams slabs footings columns staircases retaining walls water tanks limit state and working stress methods One Line Questions & Answers

1. In the working stress method, the stress in concrete at the extreme fiber is limited to: — 0.45 fck

2. The limiting depth of the neutral axis for a singly reinforced rectangular beam in Fe 415 steel is approximately: — 0.46 d

3. For a slab supporting a heavy load and having a large span, the shear reinforcement is generally required when the average shear stress exceeds: — 1.0 N/mm²

4. The minimum percentage of tension reinforcement in a singly reinforced rectangular beam is: — 0.85 / fy

5. For a two-way slab simply supported on all four sides, the ratio of the longer span to the shorter span, beyond which it is considered a one-way slab, is: — 1.5

6. The load factor for dead load and live load in limit state design, according to IS 456:2000, is typically: — 1.5 for dead load, 1.5 for live load (when acting together)

7. The limiting deflection for a simply supported beam, as per IS 456:2000, is generally taken as a fraction of the span. The common fraction is: — 1/250

8. The maximum amount of compression reinforcement in a beam, according to IS 456:2000, is: — 3% of the gross cross-sectional area

9. The minimum clear cover for main reinforcement in a reinforced concrete beam exposed to weather is: — 25 mm

10. The lap length of reinforcement bars in tension is generally taken as: — 40 times the bar diameter

11. The maximum percentage of steel reinforcement in a column is limited to: — 8%

12. The minimum diameter of shear reinforcement (stirrups) in a beam is generally: — 8 mm

13. The modular ratio 'm' is defined as the ratio of the modulus of elasticity of steel to the modulus of elasticity of concrete, i.e., m = Es / Ec. Its value is approximately: — 15

14. The minimum diameter of longitudinal reinforcing bars in a column is: — 12 mm

15. According to IS 456:2000, the maximum diameter of reinforcing bars that can be used in a one-way slab without shear reinforcement is: — 12 mm

16. The function of transverse reinforcement (stirrups) in a beam is to resist: — Shear force

17. The design of a footing is governed by: — Punching shear and bending moment

18. For footing design, the maximum bending moment is usually calculated at the: — Edge of the column

19. For a cantilever beam, the effective span is taken as: — Unsupported length

20. The effective span of a simply supported beam is taken as: — Clear span plus half the width of the support

21. The development length of a bar is the length of embedment required to develop the: — Bond strength between the bar and concrete

22. The maximum spacing of shear reinforcement (stirrups) in a beam, according to IS 456:2000, is the least of: — Effective depth, 300 mm, or 4 times the web thickness

23. The stress block parameters in limit state design for concrete are based on the: — Whitney's stress block

24. The limiting moment of resistance of a singly reinforced rectangular beam depends on: — Grade of concrete, grade of steel, and effective depth

25. The bond stress in plain bars is generally: — Lower than in deformed bars

26. In the design of staircases, the tread is the horizontal part and the riser is the: — Vertical part

27. For water tanks, the concrete mix should be: — Rich mix

28. For a rectangular column, the minimum eccentricity is taken as: — Length/500 + lateral dimension/30

29. The main reinforcement in a one-way slab is provided along the: — Shorter span

30. The minimum grade of concrete for plain concrete footings is: — M15

31. The minimum grade of concrete for reinforced concrete work exposed to moderate conditions as per IS 456:2000 is: — M20

32. In the limit state of collapse, the partial safety factor for loads is applied to: — Service loads

33. In the limit state of serviceability, the deflection is checked for: — Characteristic load

34. In the working stress method, the stress distribution in concrete is assumed to be: — Linear

35. In the working stress method, the stress distribution in concrete and steel at the ultimate load is assumed to be: — Linear in both concrete and steel

36. The minimum reinforcement in a slab is provided to: — Prevent cracking due to temperature and shrinkage

37. In the limit state of collapse, the design load is obtained by multiplying the service load by a: — Load factor

38. The effective width of a flange for a continuous T-beam is taken as: — Span/12 + width of web + 3 * thickness of flange

39. The shear strength of concrete is primarily dependent on: — Compressive strength of concrete

40. In a doubly reinforced beam, the additional compression reinforcement is provided when: — The required strength exceeds that of a singly reinforced beam

41. The critical section for shear in a beam, according to IS 456:2000, is at: — The face of the support

42. The effective length of a column is the product of its unsupported length and a factor that depends on: — The end conditions of the column

43. The minimum thickness of a water tank wall to resist hydrostatic pressure is determined by: — The diameter of the tank and the head of water

44. The depth of the foundation for a retaining wall is primarily determined by: — The soil bearing capacity and the overturning moment

45. In limit state design of reinforced concrete, the limit state of collapse corresponds to: — Rupture of the structure

46. For a column subjected to axial load and bending, the stress distribution is assumed to be: — Linear

47. In a retaining wall, the soil pressure acting on the backfill is: — Trapezoidal distribution

48. The slenderness ratio of a column is the ratio of its effective length to its: — Least lateral dimension

49. A T-beam is considered as a rectangular beam when the neutral axis is located: — Within the flange

rcc design beams slabs footings columns staircases retaining walls water tanks limit state and working stress methods - One Line Questions