CLAT PG - Design of Steel Structures 1000+ MCQ [Solved] PDF Download

1. 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

2. The maximum permissible slenderness ratio of a member carrying loads resulting from wind, is
A. 180
B. 200
C. 250
D. 300
Answer : C

3. According to IS: 800-1962, the coefficient of expansion of steel per degree centigrade per unit length, is taken as
A. 0.000008
B. 0.000010
C. 0.000012
D. 0.000014
Answer : C

4. If the thickness of thinnest outside plate is 10 mm, then the maximum pitch of rivets in tension will be taken as
A. 120 mm
B. 160 mm
C. 200 mm
D. 300 mm
Answer : B

5. Bearing stiffeners are provided at (i) The supports (ii) The mid span (iii) The point of application of concentrated loads The correct answer is
A. Only (i)
B. Both (i) and (ii)
C. Both (i) and (iii)
D. (i), (ii) and (iii)
Answer : C

6. 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

7. To minimize the total cost of a roof truss, the ratio of the cost of truss to the cost of purlins shall be
A. 1
B. 2
C. 3
D. 4
Answer : B

8. A beam may be designed as a cased beam if
A. Section is of double open channel form with the webs not less than 40 mm apart
B. Overall depth and width of the steel section do not exceed 750 and 450 mm respectively
C. Beam is solidly encased in concrete with 10 mm aggregate having 28 days strength 160 kg/cm2
D. All the above
Answer : D

9. With a percentage increase of carbon in steel, decreases its
A. Strength
B. Hardness
C. Brittleness
D. Ductility
Answer : D

10. In a fillet weld placed on the sides of the base, the metal experiences
A. Shear
B. Tension
C. Compression
D. All the above
Answer : D

11. Factor of safety is the ratio of
A. Yield stress to working stress
B. Tensile stress to working stress
C. Compressive stress to working stress
D. Bearing stress to working stress
Answer : A

12. 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

13. According to IS Specifications, the maximum pitch of rivets in compression is
A. Lesser of 200 mm and 12 t
B. Lesser of 200 mm and 16 t
C. Lesser of 300 mm and 32 t
D. Lesser of 3 00 mm and 24 t Where t is thickness of thinnest outside plate or angle
Answer : A

14. The minimum edge distance of a rivet line connecting two or more plates, is kept equal to 37 mm plus (where t is the thickness in mm of the thinner outside plate).
A. 2 t
B. 4 t
C. 6 t
D. 8 t
Answer : B

15. 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
Answer : C

16. Hudson's formula gives the dead weight of a truss bridge as a function of
A. Bottom chord area
B. Top chord area
C. Effective span of bridge
D. Heaviest axle load of engine
Answer : A

17. The greatest permissible clear dimension of the web of thickness t in the panel of a plate girder, is restricted to
A. 180 t
B. 220 t
C. 230 t
D. 270 t
Answer : D

18. 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

19. When a tension member is made of four angles with a plate as a web, the allowance for holes is made as
A. Two holes for each angle 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. Two holes for each angle and two holes for the web
Answer : C

20. 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

21. Horizontal stiffener in a plate girder is provided to safeguard against
A. Shear buckling of web plate
B. Compression buckling of web plate
C. Yielding
D. All of the aove
Answer : B

22. The central deflection of a simply supported steel beam of length L with a concentrated load W at the centre, is
A. WL³/3EI
B. WL⁴/3EI
C. WL³/48EI
D. 5WL⁴/384EI
Answer : C

23. 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

24. 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
Answer : C

25. 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

26. 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 the above
Answer : C

27. 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

28. 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

29. If f_bt and f_c are the co-existent bending tensile stress and shear stress in a member, the equivalent stress f_c is
A. ?(f_bt² + f_c²)
B. ?(f_bt² + ½f_c²)
C. ?(f_bt² + 3f_c²)
D. ?(f_bt² - 3f_c²)
Answer : C

30. The method of design of steel framework for greatest rigidity and economy in weight, is known as
A. Simply design
B. Semi-rigid design
C. Fully rigid design
D. None of these
Answer : C

31. 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

32. 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

33. The average shear stress for rolled steel beam section, is
A. 845 kg/cm²
B. 945 kg/cm²
C. 1025 kg/cm²
D. 1500 kg/cm²
Answer : B

34. The ratio of hydrostatic stress to the volumetric strain within the elastic range, is called
A. Modulus of elasticity
B. Shear modulus of elasticity
C. Bulk modulus of elasticity
D. All the above
Answer : D

35. In case of timber structures, the form factor for solid circular crosssection is taken as
A. 1.18
B. 1.414
C. 1.67
D. 1.81
Answer : A

36. 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
Answer : B

37. 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 fibre
C. Bending stress
D. None of these
Answer : A

38. 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

39. The effective length of a compression member of length L, held in position and restrained in direction at both ends, is
A. L
B. 0.67 L
C. 0.85 L
D. 1.5 L
Answer : B

40. 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

41. 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

42. 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 l is equal to
A. l = L
B. l = 2L
C. l = 0.5L
D. l = 3L
Answer : D

43. If d is the distance between te 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

44. The effective length of a compression member of length L held in position and restrained in direction at one end and effectively restrained in direction but not held in position at the other end, is
A. L
B. 0.67 L
C. 0.85 L
D. 1.5 L
Answer : A

45. 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

46. The spans are considered approximately equal if the longest span does not exceed the shortest span by more than
A. 5 %
B. 10 %
C. 15 %
D. 20 %
Answer : C

47. 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

48. 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

49. 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

50. 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