FAQ’s for Structural Design Jobs
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1. Pitch of tacking rivets, when double angles connected back-to-back and acting as tension members should not be more than
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2. The allowable shear stress in the web of mild steel beams decreases with (where ‘h’ is height and t is thickness)
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3. For rivets in tension with counter-sunk heads, the tensile value shall be
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4. Lug angles
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5. In case of plastic design, the calculated maximum shear capacity of a beam as per IS:800 shall be (where, Aw = effective cross-sectional area resisting shear fy = yield stress of the steel)
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6. The elastic strain for steel is about
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7. In case of timber structures, the simple bending formula M = fz may be applied for
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8. The centrifugal force due to curvature of track is assumed to act on the bridge at a height of
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9. If the loaded length of span in meters of a railway steel bridge carrying a single track is 6 m, then impact factor is taken as
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10. Hudson’s formula gives the dead weight of a truss bridge as a function of
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11. Which of the following sections should preferably be used at places where torsion occurs?
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12. The bracing between two columns of a steel tank will be designed to resist
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13. Steel tanks are mainly designed for
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14. The external wind pressure acting on a roof depends on
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15. The internal pressure coefficient on walls for buildings with large permeability is taken as
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16. The forces acting on the web splice of a plate girder are
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17. Bearing stiffeners are provided at i) the supports, ii) the mid span, iii) the point of application of concentrated loads. The correct answer is
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18. The slenderness ratio of lacing bars should not exceed
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19. The effective length of a battened column is increased by
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20. Lacing bars in a steel column should be designed to resist
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21. According to IS Specifications, the maximum pitch of rivets in compression is (where t is thickness of thinnest outside plate or angle)
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22. A butt weld is specified by
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23. When the bolts are subjected to reversal of stresses, the most suitable type of bolt is
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24. By providing sufficient edge distance, which of the following failures of riveted joint can be avoided?
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25. If the thickness of plate to be connected by a rivet is 16mm, then suitable size of rivet as per Unwin’s formula will be
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26. An under-reinforced section means
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27. With usual notations the depth of the neutral axis of a balanced section, is given by
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28. At-beam behaves as a rectangular beam of a width equal to its flange if its neutral axis
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29. By over-reinforcing a beam, the moment of resistance can be increased not more than
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30. The steel generally used in R.C.C. work, is
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31. The maximum ratio of span to depth of a slab simply supported and spanning in two directions, is
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32. Enlarged head of a supporting column of a flat slab is technically known as
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33. The maximum thickness of the cover at the end of a reinforcing bar should not be less than twice the diameter of the bar subject to a minimum of
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34. The width of the flange of a L-beam, should be less than
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35. The maximum ratio of span to depth of a slab simply supported and spanning in one direction, is
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36. Which of the following methods of structural analysis is a displacement method?
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37. When a uniformly distributed load, shorter than the span of the girder, moves from left to right, then the conditions for maximum bending moment at a section is that
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38. A single rolling load of 8 kN rolls alone a girder of 15 m span. the absolute maximum bending moment will be
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39. For a two-hinged arch, if one of the supports settles down vertically, then the horizontal thrust
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40. In the slope deflection equations, the deformations are considered to be caused by
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41. In moment distribution method, the sum of distribution factors of all tha members meeting at any joint is always
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42. A steel rod 1 meter long having square cross section is pulled under a tensile load of 8 tones the extension in the rod was 1 mm only. if E steel=2x106kg/cm2, the side of the rod, is
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43. The maximum deflection due to a load W at the free end of a cantilever of length L and having flexural rigidity EI, is?
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44. The maximum deflection due to a uniformly distributed load w/unit length over entire span of a cantilever of length l and of flexural rigidly EI, is?
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45. A rod of uniform cross-section A and length L force P. The young’s modules E of the material, is?
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46. A simply supported beam A carries a point load at its mid span. Another identical beam B carries the same load but uniformly distributed over the entire span. The ratio of the maximum deflections of the beams A and B, will be?
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47. Normally in a truss structure, tension occurs at/for?
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48. In frame structure, what transfers the load to columns?
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49. The diameter of base of conical flare of a steel stack is 9where d is the diameter of the cylindrical part)
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50. The effect of racking forces is considered in the design of ( i) lateral braces, ii) chord members) The correct answer is
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