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Sunday, April 26, 2020

Questions asked in SSC JE 2017 Exam (Design of steel structures)

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2017(All sets)


1. Number of rivet required in a joint is
a) Load/shear strength of a rivet
b) Load/tearing strength of a rivet
c) Load tearing strength of a rivet
d) None of these

2. Effective length of a column effectively held in position and restrained in direction at one end but neither held in position nor restrained in direction at the other end is
a) L
b) 0.67L
c) 0.85L
d) 2L



3. A compression member consisting of angle sections may be a
a) Continuous member
b) Discontinuous single angle strut
c) Discontinuous double angle strut
d) All option are correct

4. If the area of cross-section of a single angle discontinuous strut is 30 cm2 and allowable working stress corresponding to its slenderness ration is 625 kg/cm2, the safe load carrying capacity of the member is
a) 10 tonnes
b) 12 tonnes
c) 15 tonnes
d) 18 tonnes

5. If the depth of two column sections are equal, then the column splice is provided
a) With filler plated
b) With bearing plates
c) With filler and bearing plates
d) None of these

6. When a tension member is made of four angles with a plate as web, the allowance for holes is made as
a) Two holes for each angel and one hole for the web
b) One hole for each angle and one hole for the web
c) One hole for each angle and two holes for the web
d) None of these

7. The bam outside a wall up to floor level above it, is known as
a) Rafter
b) Lintel
c) Spandrel beam
d) None of these

8. For a cantilever beam of length L continuous at the support and unrestrained against torsion at the support and free at the end, the effective length ‘I is equal to
a) I = L
b) I = 2L
c) I = 0.5 L
d) I = 3L

9. Spans of continuous filler are considered approximately equal if the longest span does not exceed the shortest span by more than
a) 0.05
b) 0.1
c) 0.15
d) 0.2

10. The flange splice in plate girder is subjected to:
a) Axial force only
b) Bending moment and axial force
c) Bending moment and shear force
d) Shear force and bending moment

11. Which of the following statements istrue?
a) Most of the loads applied to a building are environmental load.
b) Most of the loads are dead followed by live loads.
c) remains constant
d) Depends upon case

12. How does an increase in the pitch of the pitch of the roof affects the amount of load that can be placed on it?
a) In increases
b) It decrease
c) Remains constant
d) Depends upon case

13. What will be the rain load ( in psf) if dS is 2 inches and dh is 1 inches?
a) 5.2
b) 10.4
c) 15.6
d) 20.8

14. Net sectional area of a tension member is equal to its cross section area _____________ .
a) Plus the area of the rivet holes
b) Divided by the area of rivet holes
c) Multiplied by the area of the rivet holes
d) Minus the area of the rivet holes

15. When a tension member consists of two channel sections, the allowance for rivet hole is made for two holes form
a) Each web
b) Each flange
c) Each web or one hole from each flange whichever is more
d) Each web or one hole from each flange whichever is less

16. Design of a riveted joint, is based on the assumption
a) Load is uniformly distributed among all the rivets
b) Shear stress on a rivet is uniformly distributed over its gross area
c) Bearing stress is uniform between the contact surfaces of the plate and the rivet
d) All option are correct

17. Effective length of a column effectively held in position and restrained in directions at both ends is
a) L
b) 0.67 L
c) 0.85 L
d) 1.5 L

18. The slenderness ratio of a column is zero when its length
a) Is zero
b) Is equal to its radius of gyration
c) Is supported on all sides throughout its length
d) None of these

19. Outstanding length of a compression member consisting of a channel is measured as
a) Half of the nominal width
b) Nominal width of the section
c) From the edge to the first row of rivets
d) None of these

20. The equivalent axial load may be defined as the load which produces a stress equal to
a) Maximum stress produced by the eccentric load
b) Maximum stressed fiber
c) Bending stress
d) None of these

21. For the economical design of a combined footing to support two equal column loads the projections of beams in lower tie are kept such that bending moment under column is equal to
a) Bending moment at the center of the beam
b) Half the bending moment at the center of the beam
c) Twice the bending moment at the center of the beam
d) None of these

22. The gross section of the web of a beam is defined as
a) Depth of the beam multiplied by its web thickness
b) Width of the flange multiplied by its web thickness
c) Sum of the flange width and depth of the beam multiplied by the web thickness
d) None of these

23. The effective length L of a simply supported beam with ends restrained against torsion, and also the ends of compression flange partially restrained against lateral bending is given by
a) L = span
b) L = 0.85 span
c) L = 0.75 span
d) L = 0.7 span

24. The connection of one beam to another beam b means of an angle at the bottom and an angle at the top, is known as
a) Unstiffened seated connection
b) Stiffened seated connection
c) Seated connection
d) None of these

25. The equivalent length of a column of length L having both the end fixed is
a) 2L
b) L
c) L/2
d) L / √2

26. A riveted joint may experience
a) Shear failure
b) Shear failure of plates
c) Bearing failure
d) All option are correct

27. If p and d are pitch and gross diameter of rivets, the efficiency (η) of the riveted joint is given by
a) η = p / (p-d)
b) η = p/ (p+d)
c) η = (p-d) / p
d) η = (p+d)/p

28. If the moment of inertia of a section about its axis is 1 and its effective sectional area is A, its radius of gyration r about the axis is
a) r = √(𝐴𝐼)
b) r = √(𝐴𝐼)
c) r = √(𝐴𝐼)
d) None of these

29. Allowable working stress corresponding to the slenderness ratio of double angles placed back to back and connected to one side of a gusset plate is reduced to
a) 50%
b) 60%
c) 70%
d) 80%

30. According to I.S : 800- 1871, lacing bars resist transverse shear equal to _____________.
a) 1.0% of the axial load
b) 2.0% of the axial load
c) 2.5% of the axial load
d) 3.0% of the axial load

31. Pick up the correct statement from the following
a) Loaded columns are supported on column bases
b) Column bases transmit the column load to the concrete foundation
c) Column load is spread over a large area on concrete
d) All option are correct

32. 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

33. The average shear stress (in kg/ cm2) for rolled beam section, is
a) 845
b) 945
c) 1025
d) 1500

34. Web crippling generally occurs ast the point where
a) Bending moment is maximum
b) Shearing force is minimum
c) Concentrated loads act
d) Deflection is maximum

35. The shape factor of standard rolled beam section varies from
a) 1.10 to 1.20
b) 1.20 to 1.30
c) 1.30 to 1.40
d) 1.40 to 1.50

36. IN plastic analysis, the shape factor for a triangular section is
a) 1.5
b) 1.34
c) 2.34
d) 25

37. A riveted joint may experience
a) Tearing failure of plates
b) Bearing failure of plates
c) Splitting failure of plates at the edges
d) All options are correct

38. The maximum axial load which is just enough to keep a column in a small deflected shape is called
a) crippling load
b) Buckling load
c) Critical load
d) All option are correct

39. Slenderness ratio of a compression member is
a) Moment of Inertia/Radius of gyration
b) Effective length/Area of cross- section
c) Radius of gyration/Area of cross- section
d) None of these

40. Pick up the correct statement from the following
a) Tacking rivets are used if the minimum distance between centers of two adjacent rivets exceeds 12t or 200 mm, whichever is less
b) Tacking rivets are not considered to calculate stress
c) Tacking rivets are provided throughout the length of a compression member composed of two components back to back
d) All option are correct

41. The thickness of a single flat lacing should not be less than
a) 1/30th length between inner end rivets
b) 1/40th length between inner end rivets
c) 1/50th length between inner end rivets
d) 1/60th length between inner end rivets

42. To keep the intensity of bearing pressure between the column base and concrete compressive and to vary from zero to 2P/BL, the ratio of the moment M to the axial load P should be
a) L/2
b) L/3
c) L/4
d) L/6

43. IS : 800- 1971 recommends that in a splice plate the number of rivets carrying calculated shear stress through a packing greater than 6 mm thick, is to be increased by 2.5% for every
a) 1.00 mm thickness of packing
b) 1.50 mm thickness of packing
c) 2.0 mm thickness of packing
d) None of these

44. To the calculated area of cover plates of a built-up beam, an allowance for rivet holes to be added is
a) 0.1
b) 0.13
c) 1.6
d) 1.7

45. In plastic analysis, the shape factor for a rectangular section is
a) 1.4
b) 1.5
c) 1.6
d) 1.7

46. Pick up the correct statement from the following
a) The point of intersection of the bending/axis with the cross section of the beam, is called shear center
b) For I sections, the shear center coincides with the centroid of the cross section of the beam
c) For channels, the shear center does not coincide its centroid
d) All options are correct

47. The ratio of crippling loads of a column having both the ends fixed to the column having both the ends hinged is
a) 1
b) 2
c) 3
d) 4

48. In a built-up section carrying tensile force, the flanges of two channels are turned outward
a) To simplify the transverse connections
b) To minimize lacing
c) To have greater lateral rigidity
d) All option are correct

49. A tension member, if subjected to possible reversal of stress due to wind, the slenderness ration of the member should not exceed
a) 180 b) 200
c) 250 d) 350

50. The one that has least carbon content is:
a) Wrought iron
b) Cast iron
c) Mild steel
d) Pig steel

51. 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 mid-section and root of the thread
d) None of these

52. 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 many occur in a straight right angle section through the center 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 hole increases
d) All option are correct

53. The strength of a riveted lap joint is equal to its
1. Shearing strength
2. Bearing strength
3. Tearing strength
a) Only 1
b) Only 2
c) Only 3
d) Least of 1, 2 and 3

54. If flexural rigidity of a column thoselength is L the critical load will be
a) PC = 𝜋EI /(4L2)
b) PC = 𝜋2 EI /(4L2)
c) PC = 𝜋EI2/(4L2)
d) None of these

55. Maximum permissible slenderness ration of compressive members which carry dead and superimposed load is
a) 350
b) 250
c) 180
d) 80

56. When plates are exposed to weather, tacking rivets are provided at a pitch in line not exceeding
a) 8t
b) 16t
c) 24t
d) 32t

57. In double lacing, the thickness ‘t’ of flat lacing is
a) t is less than 1/40th length between inner end rivets
b) t is less than 1/50th length between inner end rivets
c) t is less than 1/60th length between inner end rivets
d) t is less than 1/70th length between inner end rivets

58. Column footing is provided
a) to spread the column load over a larger area
b) To ensure that intensity of bearing pressure between the column footing and soil does not exceed permissible bearing capacity of the soil
c) To distribute the column load over soil through the column footing
d) All option are correct

59. In a truss girder of a bridge, a diagonal consists of mild steel flat 400 I.S.F. and carries a pull of 80 tones. If the gross diameter of the rivet is 26 mm the number of rivets required in the splice is
a) 26
b) 27
c) 28
d) 25

60. The rolled steel I-sections are most commonly used as beams because these provide:
1. Large moment of inertia with
less cross-sectional area
2. Greater lateral stability

a) Only 1
b) Only 2
c) 1 and 2
d) None of these

61. For simply supported beams, the maximum permitted deflection is
a) 1/325 of the span
b) 1/300 of the span
c) 1/350 of the span
d) None of these

62. The load on a lintel is assumed as uniformly distributed if the height of the masonry above it, is up to 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

63. According to the Unwin’s formula, if t is the thickness of the plate in mm, the nominal diameter of the rivet is
a) d = 1.91t
b) d = 1.91 t2
c) d = 1.91 √𝑡
d) None of these

64. Effective length of a column effectively held in position at both ends and restrained in direction at one end is
a) L
b) 0.67 L
c) 0.85 l
d) 1.5 L

65. The most economical section for a column is
a) Rectangular
b) Solid round
c) Flat strip
d) Tubular section

66. If the unsupported length of a stanchion is 4 meters and least radius of gyration of its cross-section is 5, the slenderness ratio of the stanchion is
a) 60
b) 70
c) 80
d) 90

67. A column splice is used to increase
a) Length of the column
b) Strength of the column
c) Cross-sectional area of the column
d) None of these

68. A structural member subjected to tensile force in a direction parallel to its longitudinal axis, is generally known as:
a) A tie
b) A tie member
c) A tension member
d) All option are correct

69. A major beam in a building structure is known as
a) A girder
b) A floor beam
c) A main beam
d) All option are correct

70. In rolled steel beams, shear force is mostly resisted by
a) Web only
b) Flanges only
c) Web and flanges together
d) None of these

71. For a cantilever beam of length L built-in at the support and restrained against torsion at the free end, the effective projecting length ‘I’ is
a) 1 = 0.7L
b) 1 = 0.75L
c) 1 = 0.85L
d) None of these

72. Pick up the correct statement from the following:
a) The steel beams placed in plain cement concrete are known as reinforced beams
b) The filler joists are generally continuous over three supports only
c) Continuous filters are connected to main beams by means of cleat angels
d) Continuous fillers are supported by main steel beams

73. The slenderness ratio of column is zero when its
a) Effective length is equal to actual length
b) Length is very large
c) Length is equal to its radius of gyration
d) None of these

74. In a tension member if one or more than on rivet holes are off the line, the failure of the member depends upon
a) Pitch
b) Gauge
c) Diameter of the rivet holes
d) The section multiplied by the area of the rivet hole

75. For double angles carrying tension, placed back to back and connected to either side of the gusset plate, the sectional area of the section, is equal to the cross sectional areal of
a) The section
b) The section plus area of rivet holes
c) The section minus area of rivet holes
d) The section multiplied by the area of the rivet hole

76. Efficiency of a riveted joint us defined as the ration of
a) Least strength of a riveted joint to the strength of solid plate
b) Greatest strength of a riveted joint to the strength of solid plate
c) Least strength of a riveted plate to the greatest strength of the riveted joint.
d) All option are correct

77. The critical load for a column of length 𝑙 hinged at both ends and having flexural rigidity EI, is given by
a) PC = 𝜋EI/ (L2)
b) PC = 𝜋2 EI / (L2)
c) PC = 𝜋EI2 / (L2)
d) None of these

78. For determination of allowable stress in axial compression, Indian standard Institution has adopted
a) Euler’s formula
b) Rankine formula
c) Engesser formula
d) Secant formula

79. When large value of radius of gyration is not required
a) Channels are placed back to back
b) Channel flanges are kept inward
c) Channel flanges are kept outward
d) None of these

80. Perforated cover plates are particularly suitable for built up sections consisting of
a) Channels placed back to back
b) Channels placed toe to toe
c) Four angle box section
d) All option are correct

81. In a grillage footing, the maximum shear force occurs at the
a) Edge of grillage beam
b) Center of base plate
c) Center of grillage beam
d) None of these

82. Lug angle is
a) Used with single angel member
b) Not used with double angle member
c) Used with channel member
d) All option are correct

83. When the length of a tension member is too long
a) A wire rope is used
b) A rod is used
c) A bar is used
d) A single angle is used

84. The allowable stress in axial tension is generally kept less if thickness of the member is more than
a) 10 mm
b) 12 mm
c) 15 mm
d) 20 mm



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