Design of Steel Structures 1000+ MCQ with answer for IBPS SO

1. If d is the distance between the flange angles,
A. Vertical stiffeners are provided in steel plate girders if the web is less than d/85
B. Vertical stiffeners are provided in high tensile steel plate girders if the web is less than d/175
C. Horizontal stiffeners are provided in steel plate girders if the web is less than d/200
D. All the above
Answer : D

2. The net area of round bars to resist the tension, is the area of cross section at
A. Mid-section
B. Root of the thread
C. Difference of (a) and (b)
D. None of these
Answer : B

3. The stress in the wall of a thin cylinder subjected to internal pressure, is
A. Hoop compression
B. Shear
C. Torsional shear
D. Hoop tension
Answer : D

4. Pick up the correct statement from the following:
A. When the gauge distance is larger than the pitch, the failure of the section may occur in a zig-zag line
B. When the gauge distance is smaller than the pitch, the failure of the section may occur in a straight right angle section through the centre of rivet holes
C. When the gauge distance and pitch are both equal, the failure to the section becomes more likely as the diameter of the holes increases
D. All the above
Answer : D

5. The critical load for a column of length I hinged at both ends and having flexural rigidity El, is given by
A. P_c = ?²EI/l²
B. P_c = ?EI/l²
C. P_c = ?EI/I²
D. None of these
Answer : A

6. The ratio of the span L of the filler joists to the depth d from the underside of the joist to the top of the structural concrete, should not exceed
A. 60
B. 45
C. 35
D. 25
Answer : C

7. Length of an outstanding leg of a vertical stiffener, may be taken equal to
A. 1/10th of clear depth of the girder plus 15 mm
B. 1/20th of clear depth of the girder plus 20 mm
C. 1/25th of clear depth of the girder plus 25 mm
D. 1/30th of clear depth of the girder plus 50 mm
Answer : C

8. According to IS : 800-1962 the permissible bending stress in steel slab plates, is
A. 1500 kg/cm²
B. 1420 kg/cm²
C. 2125 kg/cm²
D. 1890 kg/cm²
Answer : D

9. The live load for a sloping roof with slope 15°, where access is not provided to roof, is taken as
A. 0.65 kN/m²
B. 0.75 kN/m²
C. 1.35 kN/m²
D. 1.50 kN/m²
Answer : A

10. If the depth of the section of an upper column is smaller than the lower column
A. Filler plates are provided with column splice
B. Bearing plates are provided with column splice
C. Filler plates and bearing plates are provided with column splice
D. None of these
Answer : D

11. In case of timber structures, the simple bending formula M = fz may be applied for
A. Rectangular beams up to 300 mm depth
B. All rectangular beams
C. Solid circular beams only
D. All square cross-section beams
Answer : A

12. Load factor is
A. Always equal to factor of safety
B. Always less than factor of safety
C. Always greater than factor of safety
D. Sometimes greater than factor of safety
Answer : C

13. To keep the intensity of bearing pressure between the column base and concrete, compressive throughout the length of the column base, the ratio of the moment M to axial load P should be
A. < L/3
B. < L/6
C. > L/3
D. > L/6
Answer : B

14. The channels get twisted symmetrically with regard to its axis
A. Parallel to flanges
B. Parallel to web
C. Perpendicular to flanges
D. Perpendicular to web
Answer : B

15. In moment resistant connections, the moment resistance of riveted connection depends upon
A. Shear in rivets
B. Compression in rivets
C. Tension in rivets
D. Strength of rivets in bearing
Answer : C

16. The distance between e.g. of compression and e.g. of tension flanges of a plate girder, is known as
A. Overall depth
B. Clear depth
C. Effective depth
D. None of these
Answer : C

17. The bracing provided in the plane of end posts is called
A. Sway bracing
B. Portal bracing
C. Top lateral bracing
D. Bottom lateral bracing
Answer : B

18. In factory buildings, the horizontal beams spanning between the wall columns supporting a wall covering, are called
A. Stringers
B. Trimmers
C. Girts
D. Lintels
Answer : C

19. Strengths of a rivet in single shearing, in bearing and in tearing are 3425 kg, 4575 kg and 5025 kg respectively. If the load in the member is 35 tonnes, the number of rivets required, is
A. 10
B. 11
C. 12
D. 13
Answer : D

20. The cross-section of a standard fillet is a triangle whose base angles are
A. 45° and 45°
B. 30° and 60°
C. 40° and 50°
D. 20° and 70°
Answer : A

21. According to the Unwin's formula, if t is thickness of the plate in mm, the nominal diameter of the rivet, is
A. d = 1.91 t
B. d = 1.91 t2
C. d = 1.91 ?t
D. d = 1.91 ?t
Answer : C

22. The load on a lintel is assumed as uniformly distributed if the height of the masonry above it, is upto a height of
A. The effective span
B. 1.25 times the effective span
C. 1.50 times the effective span
D. 2.0 times the effective span
Answer : B

23. The minimum width B of a solid casing for a cased beam, is equal to
A. B = b + 25 mm
B. B = b + 50 mm
C. B = b + 75 mm
D. B = b + 100 mm
Answer : D

24. On steel structures the dead load is the weight of
A. Steel work
B. Material fastened to steel work
C. Material supported permanently
D. All the above
Answer : D

25. Generally the purlins are placed at the panel points so as to avoid
A. Axial force in rafter
B. Shear force in rafter
C. Deflection of rafter
D. Bending moment in rafter
Answer : D

26. The heaviest I-section for same depth is
A. ISMB
B. ISLB
C. ISHB
D. ISWB
Answer : C

27. If W and L are the total superimposed load and the span of a plate girder in metres, the approximate self weight (W) of the girder, is taken as
A. M = WL/100
B. M = WL/200
C. M = WL/300
D. M = WL/400
Answer : C

28. If L is the overall length of a combined footing having A as its area, d being the distance between the centre of gravity of the base and centre of the base, the larger width b is
A. (A/L) + (3Ad/L²)
B. (A/L) + (6Ad/L²)
C. (A/L) - (6Ad/L²)
D. (A/L) - (3Ad/L²)
Answer : B

29. The portal bracing in a truss bridge is used to
A. Transfer load from top of end posts to bearings
B. Keep the rectangular shape of the bridge cross-section
C. Stiffen the structure laterally
D. Prevent the sides-way buckling of top chord
Answer : A

30. The maximum permissible span of asbestos cement sheets is
A. 650 mm
B. 810 mm
C. 1250 mm
D. 1680 mm
Answer : D

31. If d is the distance between the flange angles of a plate girder, vertical stiffeners are provided at a distance not greater than
A. d but not less than 0.20 d
B. 1.25 d but not less than 0.33 d
C. 1.5 d but not less than 0.33 d
D. 2.0 d but not less than 0.50 d
Answer : B

32. Rolled steel Tee-sections are used
A. As columns
B. With flat strips to connect plates in steel rectangular tanks
C. As built up sections to resist axial tension
D. None of these
Answer : B

33. Bending compressive and tensile stresses respectively are calculated based on
A. Net area and gross area
B. Gross area and net area
C. Net area in both cases
D. Gross area in both cases
Answer : B

34. As per IS: 800, in the plastic design, which of the following pairs are correctly matched?
Working Loads Load factor
(i) Dead load 1.7
(ii) Dead Load + imposed load 1.7
(iii) Dead load + load due to wind or 1.3 seismic forces
(iv) Dead load + imposed load + load 1.7 due to wind or seismic forces
Of these statements
A. (i) and (ii) are correct
B. (i), (ii) and (iii) are correct
C. (ii) and (iii) are correct
D. Only (i) is correct
Answer : A

35. Rolled steel angle sections are classified as
A. Equal angles
B. Unequal angles
C. Bulb angles
D. All the above
Answer : D

36. For steel members not exposed to weather, the thickness of steel should not be less than
A. 4.5 mm
B. 6 mm
C. 8 mm
D. 10 mm
Answer : B

37. The moment-curvature relation at a plastic hinge is
A. Linear
B. Parabolic
C. Constant moment for all curvatures
D. Constant curvature for all moments
Answer : C

38. Intermediate vertical stiffeners in a plate girder need be provided if the depth of web exceeds
A. 50 t
B. 85 t
C. 200 t
D. 250 t Where t is thickness of web
Answer : B

39. Maximum permissible slenderness ratio of a member normally acting as a tie in a roof truss, is
A. 180
B. 200
C. 250
D. 350
Answer : D

40. The distance measured along one rivet line from the centre of a rivet to the centre of adjoining rivet on an adjacent parallel rivet line, is called
A. Pitch of rivet
B. Gauge distance of rivet
C. Staggered pitch
D. All the above
Answer : C

41. The most commonly used sections in lateral system to carry shear force in built up columns, are
A. Rolled steel flats
B. Rolled angles
C. Rolled channels
D. All the above
Answer : D

42. Theinternal pressure coefficient on walls for buildings with large permeability is taken as
A. ± 0.2
B. ±0.5
C. ± 0.7
D. 0
Answer : C

43. An imaginary line along which rivets are placed, is known as
A. Rivet line
B. Back line
C. Gauge line
D. All the above
Answer : D

44. In a built up section carrying a tensile force, the flanges of two channels are turned outward
A. To simplify the transverse connections
B. To minimise lacing
C. To have greater lateral rigidity
D. All the above
Answer : C

45. The main assumption of the method of simple design of steel frame work, is:
A. Beams are simply supported
B. All connections of beams, girders and trusses are virtually flexible
C. Members in compression are subjected to forces applied at appropriate eccentricities
D. All the above
Answer : D

46. The economical depth d of a web plate in which allowable bearing stress is f_b, and the maximum bending moment is M, as suggested by Rawater and Clark, is
A. d = ?(M/f_b)
B. d = 1.5 ?(M/f_b)
C. d = 2.5 ?(M/f_b)
D. d = 4.5 ?(M/f_b)
Answer : D

47. If the 20 mm rivets are used in lacing bars, then the minimum width of lacing bar should be
A. 40 mm
B. 60 mm
C. 80 mm
D. 100 mm
Answer : B

48. Pick up the correct statement from the following:
A. The minimum pitch should not be less than 2.5 times the gross diameter of the river
B. The minimum pitch should not be less than 12 times the gross diameter of the rivet
C. The maximum pitch should not exceed 10 times the thickness or 150 mm whichever is less in compression
D. All the above
Answer : A

49. The beam outside a wall upto floor level above it, is known as
A. Rafter
B. Purlin
C. Spandrel beam
D. Lintel
Answer : C

50. In case of plastic design, the calculated maximum shear capacity of a beam as per IS: 800 shall be
A. 0.55 Aw.fy
B. 0.65 Aw.fy
C. 0.75 Aw.fy
D. 0.85 Aw.fy Where, Aw = effective cross-sectional area resisting shear fy = yield stress of the steel
Answer : A