Design of Steel Structures MCQ Solved Paper for CEED

1. The web crippling due to excessive bearing stress can be avoided by
A. Increasing the web thickness
B. Providing suitable stiffener
C. Increasing the length of the bearing plates
D. None of the above
Answer : C

2. 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 in the rivet is neglected
D. All the above
Answer : D

3. If P is the wind pressure in kg/cm², v is the velocity in km/hour and K is a constant of proportionality, then
A. P = K/v²
B. v = K/P²
C. P = Kv²
D. P = Kv
Answer : C

4. 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

5. The thickness t 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
Answer : B

6. 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

7. 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

8. Stiffeners are used in a plate girder
A. To reduce the compressive stress
B. To reduce the shear stress
C. To take the bearing stress
D. To avoid bulking of web plate
Answer : D

9. The effective length of a fillet weld should not be less than
A. Two times the weld size
B. Four times the weld size
C. Six times the weld size
D. Weld size
Answer : B

10. 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

11. Cold driven rivets range from
A. 6 to 10 mm in diameter
B. 10 to 16 mm in diameter
C. 12 to 22 mm in diameter
D. 22 to 32 mm in diameter
Answer : C

12. The slenderness ratio of a column supported throughout its length by a masonry wall is
A. Zero
B. 10
C. 100
D. Infinity
Answer : A

13. If a pair of angles placed back to back in tension are connected by one leg of each angle, the net effective area of the section, 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 : D

14. 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

15. A fillet weld whose axis is parallel to the direction of the applied load, is known as
A. Diagonal filler weld
B. End fillet weld
C. Side fillet weld
D. All the above
Answer : C

16. For the economical design of a combined footing to support two equal column loads, the projections of beams in lower tier are kept such that bending moment under column is equal to
A. Bending moment at the centre of the beam
B. Half the bending moment at the centre of the beam
C. Twice the bending moment at the centre of the beam
D. None of these
Answer : A

17. 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

18. Economical depth of a plate girder corresponds to
A. Minimum weight
B. Minimum depth
C. Maximum weight
D. Minimum thickness of web
Answer : A

19. The ratio of plastic section modulus to elastic section modulus
A. Is equal to 1
B. Is always less than 1
C. Is always greater than 1
D. Can be less than 1
Answer : C

20. In plastic analysis, the shape factor for circular sections, is
A. 1.5
B. 1.6
C. 1.697
D. None of these
Answer : C

21. 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

22. Tacking rivets in compression plates not exposed to the weather, have a pitch not exceeding 300 mm or
A. 16 times the thickness of outside plate
B. 24 times the thickness of outside plate
C. 32 times the thickness of outside plate
D. 36 times the thickness of outside plate
Answer : C

23. The bracing between two columns of a steel tank will be designed to resist
A. Horizontal shear due to wind or earthquake only
B. Horizontal, shear due to wind or earthquake + 2.5% of column loads
C. Column loads + 2.5% of horizontal shear due to wind or earthquake
D. Column loads + full horizontal shear due to wind or earthquake
Answer : B

24. Bolts are most suitable to carry
A. Shear
B. Bending
C. Axial tension
D. Shear and bending
Answer : C

25. 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

26. The minimum pitch of rivet holes of diameter d should not be less than
A. d
B. 1.25 d
C. 1.5 d
D. 2.5 d
Answer : D

27. 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

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 maximum spacing of vertical stiffeners is
A. 1.33 d
B. 1.25 d
C. 1.5 d
D. 1.75 d Where d is the distance between flange angles
Answer : C

30. 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

31. A simply supported beam carrying a central load, will be safe in deflection if the ratio of its span to depth, is
A. < 19
B. < 24
C. > 19
D. > 24
Answer : B

32. The allowable stress in axial tension for rolled I-sections and channels, is taken as
A. 1420 kg/cm²
B. 1500 kg/cm²
C. 2125 kg/cm²
D. 1810 kg/cm²
Answer : B

33. 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

34. The use of tie plates in laced columns is
A. Prohibited
B. Not prohibited
C. Permitted at start and end of lacing system only
D. Permitted between two parts of the lacing
Answer : C

35. 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

36. 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

37. 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

38. Rolled steel beams are designated by Indian Standard series and its
A. Weight per metre and depth of its section
B. Depth of section and weight per metre
C. Width of flange and weight per metre
D. Weight per metre and flange width
Answer : B

39. 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

40. If p and d are pitch and gross diameter of rivets, the efficiency (?) of the riveted joint, is given by
A. ? = p/p - d
B. ? = p/p + d
C. ? = p - d/p
D. ? = p + d/p
Answer : C

41. When a 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
Answer : B

42. The thickness of the web of a mild steel plate girder is less than d/200. If only one horizontal stiffener is used, it is placed at
A. The neutral axis of the section
B. 2/3rd of the depth of the neutral axis from the compression flange
C. 2/5th of the depth of the neutral axis from the compression flange
D. 2/5th of the height of the neutral axis from tension flange
Answer : C

43. If the thickness of a structural member is small as compared to its length and width, it is classified as
A. One dimensional
B. Two dimensional
C. Three dimensional
D. None of these
Answer : B

44. The rolled steel I-sections are most commonly used as beams because these provide
A. Large moment of inertia with less cross-sectional area
B. Large moment of resistance as compared to other section
C. Greater lateral stability
D. All the above
Answer : D

45. The best arrangement to provide unified behaviour in built up steel columns is by
A. Lacing
B. Battening
C. Tie plates
D. Perforated cover plates
Answer : A

46. If the thickness of plate to be connected by a rivet is 16 mm, then suitable size of rivet as per Unwin's formula will be
A. 16 mm
B. 20 mm
C. 24 mm
D. 27 mm
Answer : C

47. 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

48. For a column of height L fixed in position and direction both at its top and bottom, its effective length, is
A. L
B. 1/?2 × L
C. ½ L
D. 2L
Answer : C

49. Pick up the correct statement from the following:
A. Tacking rivets are used if the minimum distance between centres of two adjacent rivets exceeds 12 t 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 the above
Answer : D

50. The maximum slenderness ratio of a steel column, the design of which is governed by wind or seismic forces is
A. 150
B. 180
C. 250
D. 350
Answer : C