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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. Lug angles

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3. The minimum thickness of a steel plate, which is directly exposed to weather and is not accessible for cleaning and repainting, should be:

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4. 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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5. The shape factor of an isosceles triangle for bending about the axis parallel to the base is:

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6. The ratio of plastic section modulus to elastic section modulus

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7. The mechanism method of plastic analysis satisfies

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8. The mechanism method and the statical method give

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9. The portal bracing in a truss bridge is used to

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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. The allowable tensile stress in structural mild steel plates for steel tank is assumed as

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12. Area of openings for buildings of large permeability is more than

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13. Rivets connecting flange angles to cover plates in a plate girder are subjected to

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14. The forces acting on the web splice of a plate girder are

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15. Horizontal stiffener in a plate girder is provided to safe guard against

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16. Shear buckling of web in a plate girder is prevented by using

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17. Lacing bars in a steel column should be designed to resist

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18. Angle of inclination of the lacing bar with the longitudinal axis of the column should preferably be between

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19. The best arrangement to provide unified behavior inbuilt up steel columns is by

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20. If the 20 mm rivets are used in lacing bars, then the minimum width of lacing bar should be

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21. The maximum slenderness ratio of a steel column, the design of which is governed by wind or seismic forces is

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22. The effective length of a fillet weld should not be less than

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23. In the cross-section of a weld, throat is the

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24. Bolts are most suitable to carry

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25. The difference between gross diameter and nominaldia meter for the rivets up to 25 mm diameter is

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26. When the axis of load lies in the plane of rivet group, then the most heavily loaded rivet will be the one which

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27. If the thickness of thinnest outside plate is 10 mm, then the maximum pitch of rivets in tension will be taken as

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28. The minimum number of main steel bars provided in R.C.C.

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29. If the length of an intermediate span of a continuous slab is 5m, the length of the end span is kept

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30. The minimum thickness of s flat slab is taken

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31. In a pre-stressed member, it is advisable to use

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32. If the width of the foundation for two equal columns is restricted, the shape of the footing generally adopted, is

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33. 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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34. For a two-hinged arch, if one of the supports settles down vertically, then the horizontal thrust

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35. Bending moment at any section in a conjugate beam gives in the actual beam

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36. In the slope deflection equations, the deformations are considered to be caused by

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37. A truss containing j joints and m members, will be a simple truss if?

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38. A lift of weight W is lifted by a rope with an acceleration f. if the area of cross-section of the rope is A, the stress in the rope is?

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39. A simply supported beam carries varying load from zero at one end and W at the other end. If the length of the beam is a, the maximum bending moment will be?

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40. 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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41. A cantilever of length is subjected to a bending moment at its free end If EI is the rigidity of the section, the deflection of the free end, is?

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42. For a continuous slab of 3m 3.5m size, the minimum overall depth of slab to satisfy vertical deflection limits is?

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43. 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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44. The maximum spacing of vertical stiffeners is (where d is the distance between flange angles)

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45. The range of economical spacing of trusses varies from

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46. Horizontal stiffener in a plate girder is provided to safeguard against

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47. Minimum pitch of the rivets shall not be less than where d is gross diameter of rivet

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48. When the axis of load lies in the plane of rivet group, then the most heavily loaded rivet will be the one which (where, Fa is the load shared by each rivet due to axial load and F mis the shearing load due to moment in any rivet.)

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49. Which of the following types of riveted joint is free from bending stresses ?

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50. The difference between gross diameter and nominal diameter for the rivets up to 25 mm diameter is

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