Design of Steel Structures (Practice Test MCQs)

50 Score: 0 Attempted: 0/50

1. The primary purpose of reinforcement in concrete is:
(A) To resist compressive stresses
(B) To resist tensile stresses
(C) To increase weight
(D) To prevent shrinkage

2. The grade of concrete M25 represents:
(A) 25 MPa compressive strength at 14 days
(B) 25 MPa compressive strength at 28 days
(C) 25 kg/cm² tensile strength at 28 days
(D) 25% water-cement ratio

3. The minimum clear cover for RCC beams is:
(A) 15 mm
(B) 20 mm
(C) 25 mm
(D) 40 mm

4. The main purpose of stirrups in RCC beams is:
(A) To resist torsion
(B) To resist shear
(C) To resist compression
(D) To provide ductility

5. The maximum permissible compressive strain in concrete as per IS 456 is:
(A) 0.002
(B) 0.0035
(C) 0.004
(D) 0.0025

6. The limiting value of the water-cement ratio for RCC as per IS 456 for durability is:
(A) 0.45
(B) 0.50
(C) 0.55
(D) 0.60

7. The modular ratio is the ratio of:
(A) Modulus of elasticity of steel to concrete
(B) Modulus of elasticity of concrete to steel
(C) Tensile strength of concrete to steel
(D) Shear strength of concrete to steel

8. The characteristic strength of concrete is defined as:
(A) Average strength of cubes
(B) Mean strength + 1.65σ
(C) Strength below which not more than 5% of test results are expected to fall
(D) Ultimate strength of concrete

9. The balanced section in RCC design is one in which:
(A) Steel reaches yield stress first
(B) Concrete reaches ultimate stress first
(C) Both steel and concrete reach their permissible stresses simultaneously
(D) No stresses develop

10. The minimum percentage of longitudinal reinforcement in RCC beams is:
(A) 0.8%
(B) 0.85%
(C) 0.9%
(D) 1%

11. In a singly reinforced beam, the reinforcement is provided:
(A) Only on compression side
(B) Only on tension side
(C) On both tension and compression sides
(D) None of the above

12. The effective span of a simply supported RCC beam is:
(A) Clear span
(B) Center-to-center of supports
(C) Lesser of clear span + effective depth or center-to-center of supports
(D) Clear span + bearing length

13. The minimum grade of concrete for RCC work as per IS 456 is:
(A) M10
(B) M15
(C) M20
(D) M25

14. Development length depends on:
(A) Diameter of bar
(B) Bond stress
(C) Grade of steel
(D) All of the above

15. The term “under-reinforced section” means:
(A) Steel yields before concrete crushes
(B) Concrete crushes before steel yields
(C) Both fail simultaneously
(D) Section has no reinforcement

16. The bond between steel and concrete is mainly due to:
(A) Adhesion only
(B) Friction only
(C) Mechanical interlocking and adhesion
(D) Tensile strength of steel

17. Shear reinforcement in a beam is not required if:
(A) Shear stress is less than permissible limit
(B) Moment is very high
(C) Span is long
(D) Beam is doubly reinforced

18. The main purpose of dowel bars in RCC construction is:
(A) To transfer bending moment
(B) To allow horizontal movement and transfer load between slabs
(C) To increase reinforcement percentage
(D) To reduce cracking

19. The minimum cover for reinforcement in a footing is:
(A) 25 mm
(B) 40 mm
(C) 50 mm
(D) 75 mm

20. The effective depth of a beam is measured from:
(A) Top of beam to centroid of tension reinforcement
(B) Top of beam to bottom fiber
(C) Neutral axis to bottom fiber
(D) Center of compression steel

21. In RCC slabs, the main reinforcement is placed:
(A) Parallel to short span
(B) Parallel to long span
(C) In both directions equally
(D) At 45°

22. Two-way slabs are those in which:
(A) Slab bends in one direction only
(B) Slab bends in two directions
(C) Reinforcement is only in one direction
(D) None of the above

23. The minimum thickness of a flat slab is governed by:
(A) Moment of resistance
(B) Shear force
(C) Deflection control
(D) Tensile strength

24. The lapping length in tension should not be less than:
(A) 24Φ
(B) 40Φ
(C) 50Φ
(D) 60Φ

25. In a doubly reinforced beam:
(A) Steel is provided only on tension side
(B) Steel is provided on both tension and compression sides
(C) Only shear reinforcement is used
(D) No concrete is in compression

26. The partial safety factor for concrete as per IS 456 (Limit State) is:
(A) 1.0
(B) 1.15
(C) 1.5
(D) 1.7

27. The partial safety factor for steel as per IS 456 (Limit State) is:
(A) 1.0
(B) 1.15
(C) 1.5
(D) 2.0

28. The maximum percentage of reinforcement in a column is:
(A) 4%
(B) 5%
(C) 6%
(D) 8%

29. The minimum percentage of steel in a slab is:
(A) 0.12% for Fe-250
(B) 0.15% for Fe-415
(C) Both A and B
(D) 0.2%

30. The main reinforcement in a column is provided:
(A) In the form of stirrups
(B) As longitudinal bars with lateral ties
(C) Only on one side
(D) None of the above

31. The minimum number of longitudinal bars in a rectangular column is:
(A) 2
(B) 3
(C) 4
(D) 6

32. The minimum number of longitudinal bars in a circular column is:
(A) 2
(B) 4
(C) 5
(D) 6

33. The main purpose of lateral ties in columns is:
(A) To provide bending strength
(B) To hold longitudinal bars in position and prevent buckling
(C) To transfer loads
(D) To prevent corrosion

34. Slender columns are those having:
(A) Slenderness ratio less than 12
(B) Slenderness ratio between 12–50
(C) Slenderness ratio more than 12
(D) Slenderness ratio more than 50

35. The ultimate strength of RCC beam is governed by:
(A) Tensile strength of concrete
(B) Compressive strength of concrete
(C) Yield strength of steel
(D) Both steel and concrete strength

36. The main cause of bond failure is:
(A) Excessive reinforcement
(B) Inadequate development length
(C) High strength concrete
(D) Use of deformed bars

37. The type of slab used in parking floors is:
(A) Flat slab
(B) One-way slab
(C) Waffle slab
(D) Both A and C

38. The effective length of a column with both ends restrained is:
(A) 0.5L
(B) 0.65L
(C) 0.7L
(D) L

39. The effective length of a column with one end fixed and other free is:
(A) 0.5L
(B) L
(C) 2L
(D) 1.5L

40. A flat slab is supported by:
(A) Beams only
(B) Columns with or without drop panels
(C) Load-bearing walls
(D) None of the above

41. The minimum diameter of bars used in stirrups is:
(A) 6 mm
(B) 8 mm
(C) 10 mm
(D) 12 mm

42. The minimum grade of concrete for prestressed concrete as per IS 1343 is:
(A) M20
(B) M30
(C) M35
(D) M40

43. The most common type of failure in under-reinforced RCC beams is:
(A) Brittle failure
(B) Ductile failure
(C) Bond failure
(D) Shear failure

44. The live load considered for a residential building as per IS 875 is:
(A) 1 kN/m²
(B) 2 kN/m²
(C) 3 kN/m²
(D) 4 kN/m²

45. The shrinkage reinforcement is provided to:
(A) Resist thermal stresses
(B) Prevent cracks due to shrinkage
(C) Improve ductility
(D) Reduce deflection

46. The maximum spacing of main bars in slabs shall not exceed:
(A) 100 mm
(B) 200 mm
(C) 300 mm
(D) 450 mm

47. The neutral axis of a beam is:
(A) The axis where tensile stress is maximum
(B) The axis where compressive stress is maximum
(C) The axis where stress is zero
(D) The centroid of steel section

48. The design philosophy of Limit State Method ensures:
(A) Only strength requirements
(B) Only serviceability requirements
(C) Both strength and serviceability requirements
(D) Economic design only

49. The most economical shape of a RCC water tank is:
(A) Rectangular
(B) Circular
(C) Square
(D) Polygonal

50. The creep in concrete is influenced by:
(A) Water-cement ratio
(B) Age of concrete
(C) Stress level
(D) All of the above

Design of Steel Structures (Practice Test MCQs)

1. Basic/Foundation Subjects

2. Core Civil Engineering Subjects

3. Advanced/Applied Subjects

4. Management and Planning

5. Environmental & Sustainable Development