SSC JE - Design of Steel Structures 1000+ MCQ [Solved] PDF Download

1. 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
Answer : A

2. When a tension member consists of two channel sections, the allowance for rivet hole is made for two holes from
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
Answer : D

3. Steel tanks are mainly designed for
A. Weight of tank
B. Wind pressure
C. Water pressure
D. Earthquake forces
Answer : C

4. With usual notations of the letters, the shear stress f_s at any point of the cross-section is given by
A. f_s =FQ/It
B. f_s =Ft/IQ
C. f_s =It/FQ
D. f_s =IF/Qt
Answer : A

5. Pick up the correct statement from the following:
A. Vertical stiffeners may be placed in pairs one on each side of the web
B. Single vertical stiffeners may be placed alternately on opposite sides of the web
C. Horizontal stiffeners may be placed alternately on opposite sides of the web
D. All the above
Answer : D

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

7. If d is the distance between the flange angles, the vertical stiffeners in plate girders are spaced not greater than
A. d
B. 1.25 d
C. 1.5 d
D. 1.75 d
Answer : C

8. Compression force in two end posts, the pin of a rocker bearing in a bridge is designed for
A. Bearing and shear
B. Bending and shear
C. Bearing and bending
D. Bearing, shear and bending
Answer : D

9. 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

10. Shape factor is a property which depends
A. Only on the ultimate stress of the material
B. Only on the yield stress of the material
C. Only on the geometry of the section
D. Both on the yield stress and ultimate stress of material
Answer : C

11. Assuming the values of maximum deviation ?P and ?E to be 25% of the computed value of P and E respectively, the minimum value of the factor of safety is
A. 1.00
B. 0.67
C. 1.67
D. 2.67
Answer : C

12. 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

13. The mechanism method and the statical method give
A. Lower and upper bounds respectively on the strength of structure
B. Upper and lower bounds respectively on the strength of structure
C. Lower bound on the strength of structure
D. Upper bound on the strength of structure
Answer : B

14. When a load is transferred through one surface to another surface in contact, the stress is known as
A. Tensile stress
B. Compressive stress
C. Shearing stress
D. None of these
Answer : D

15. A 20 mm dia steel bar which is subjected to an axial tension of 2300 kg/cm² produces a strain of 0.004 cm. If Young's modulus of steel is 2.1 × kg/cm², the bar is
A. In the elastic range
B. In the plastic range
C. At yield point
D. None of these
Answer : A

16. In a truss girder of a bridge, a diagonal consists of mild steel flat 4001.S.F. and carries a pull of 80 tonnes. If the gross-diameter of the rivet is 26 mm, the number of rivets required in the splice, is
A. 6
B. 7
C. 8
D. 9
Answer : C

17. If the area of cross-section of a single angle discontinuous strut is 30 cm2 and allowable working stress corresponding to its slenderness ratio 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
Answer : C

18. An axial loaded column is supported on a slab base whose projection is 8 cm. If the intensity of pressure from concrete is 40 kg/cm² and allowable bending stress in slab base is 1890 kg/cm², the thickness (t) of the slab base, is
A. t = ?(21/64)
B. t = ?(64/21)
C. t = 21/64
D. t = 64/21
Answer : B

19. A beam is defined as a structural member subjected to
A. Axial loading
B. Transverse loading
C. Axial and transverse loading
D. None of these
Answer : B

20. Poisson's ratio for steel within elastic limit, ranges from
A. 0.15 to 0.20
B. 0.25 to 0.24
C. 0.25 to 0.33
D. 0.33 to 0.35
Answer : C

21. 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

22. For a cantilever beam of length L built-in at the support and restrained against torsion at the free end, the effective projecting length l is
A. l = 0.7 L
B. l = 0.75 L
C. l = 0.85 L
D. l = 0.5 L
Answer : B

23. The effective length of a battened strut effectively held in position at both ends but not restrained in direction is taken as
A. 1.8 L
B. L
C. 1.1 L
D. 1.5 L
Answer : C

24. The side thrust T on the tie rods provided at the end beam of jack arch of rise R, is calculated from the formula
A. T = WL/4R
B. T = WR/8L
C. T = WL/8R
D. T = WL/2R
Answer : C

25. Pick up the correct statement from the following:
A. The slenderness ratio of lacing bars for compression members should not exceed 145
B. The minimum width of lacing bar connected with rivets of nominal diameter 16 mm, is kept 50 mm
C. The minimum thickness of a flat lacing bar is kept equal to onefortieth of its length between inner end rivets
D. All the above
Answer : D

26. 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

27. A web plate is called unstiffened if the ratio of clear depth to thickness is less than
A. 35
B. 50
C. 65
D. 85
Answer : D

28. Modified moment of inertia of sections with a single web, is equal to moment of inertia of the section about Y-Y axis at the point of maximum bending moment and is multiplied by the ratio of
A. Area of compression flange at the minimum bending moment to the corresponding area at the point of maximum bending moment
B. Area of tension flange at the minimum bending moment of the corresponding area at the point of maximum bending moment
C. Total area of flanges at the maximum bending moment to the corresponding area at the point of maximum bending moment
D. None of these
Answer : C

29. Lug angle is
A. Used with single angle member
B. Not used with double angle member
C. Used with channel member
D. All the above
Answer : D

30. Pitch of tacking rivets, when double angles connected back to back and acting as tension members should not be more than
A. 500 mm
B. 600 mm
C. 1000 mm
D. 300 mm
Answer : C

31. The effect of racking forces is considered in the design of (i) Lateral braces (ii) Chord members The correct answer is
A. Only (i)
B. Only (ii)
C. Both (i) and (ii)
D. None of the above
Answer : A

32. A structural member subjected to compressive stress in a direction parallel to its longitudinal axis, is generally known as
A. Column
B. Stanchion
C. Post
D. All the above
Answer : D

33. 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/Effective length
D. Radius of gyration/ Area of cross-section
Answer : C

34. When the bolts are subjected to reversal of stresses, the most suitable type of bolt is
A. Black bolt
B. Ordinary unfinished bolt
C. Turned and fitted bolt
D. High strength bolt
Answer : D

35. If the moment of inertia of a section about its axis is I and its effective sectional area is A, its radius of gyration r about the axis, is
A. r = I/A
B. r = ?(I/A)
C. r = ?(I/A)
D. r = ?(A/I)
Answer : B

36. 2.Compression members composed of two channels back-to-back and separated by a small distance are connected together by riveting so that the minimum slenderness ratio of each member between the connections, does not exceed
A. 40
B. 50
C. 60
D. 70
Answer : A

37. A single angle in tension is connected by one leg only. If the areas of connecting and outstanding legs are respectively a and b, net effective area of the angle, is
A. a - [b/{1 + 0.35 (b/a)}]
B. a + [b/{1 + 0.35 (b/a)}]
C. a - [b/{1 + 0.2 (b/a)}]
D. a + [b/{1 + 0.2 (b/a)}]
Answer : B

38. Which of the following conditions is to be satisfied both in elastic and plastic analysis?
A. Equilibrium condition
B. Yield condition
C. Plastic moment condition
D. Mechanism condition
Answer : A

39. The connection of intermediate vertical stiffeners to the web, not subjected to external loads, shall be designed for a minimum shear force (kN/m) of
A. 75 t²/h
B. 125 t³/h²
C. 125 t²/h
D. 175 t²/h Where, t = the web thickness in mm and h = the outstand of stiffener in mm
Answer : C

40. As per ISI, rolled steel beam sections are classified into
A. Two series
B. Three series
C. Four series
strong>D. Five series
Answer : D

41. When the upper column does not provide full bearing area over lower column, the column splice is provided with the following assumption
A. Bearing plate is assumed as a short beam to transmit the axial load to the lower column section
B. Axial load is assumed to be taken by flanges
C. Load transmitted from the flanges of upper column and reactions from the flanges of lower columns are equal and form a couple
D. All the above
Answer : D

42. For a compression member with double angle section, which of the following section will give larger value of minimum radius of gyration?
A. Equal angles back to back
B. Unequal legged angles with long legs back to back
C. Unequal legged angles with short legs back to back
D. Both (B) and (C)
Answer : B

43. The beams supporting the steps of a stair are generally known as
A. Headers
B. Trimmers
C. Stringers
D. Spandrel beams
Answer : C

44. For the steel member exposed to weather and accessible for repainting, the thickness of steel should not be less than (accepting the webs of Indian Standard rolled steel joists and channels).
A. 4 mm
B. 6 mm
C. 8 mm
D. 10 mm
Answer : B

45. The overlap of batten plates with the main members in welded connections should be more than
A. 3 t
B. 4 t
C. 6 t
D. 8 t Where t = thickness of the batten plate
Answer : B

46. According to IS Specifications, the effective length of a column effectively held in position at both ends and restrained in direction at one end is taken as
A. 0.67 L
B. 0.8 L
C. L
D. 1.5 L
Answer : B

47. Minimum pitch provided in riveted steel tanks is
A. 1.5 d
B. 2.0 d
C. 2.5 d
D. 3.0 d Where d is diameter of rivets
Answer : D

48. The main advantage of a steel member, is:
A. Its high strength
B. Its gas and water tightness
C. Its long service life
D. All the above
Answer : D

49. Which of the following types of riveted joint is free from bending stresses?
A. Lap joint
B. Butt joint with single cover plate
C. Butt joint with double cover plates
D. None of the above
Answer : C

50. Study the following statements. (i) Top lateral bracing prevents the sides-way buckling of the chord. (ii) Sway bracing keeps the rectangular shape of the bridge crosssection. (iii) Sway bracing transfers the load from top of end posts to bearings. The correct answer is
A. Only (i)
B. Both (i) and (ii)
C. Both (i) and (iii)
D. All (i), (ii) and (iii)
Answer : B