21. If the thickness of thinnest outside plate is 10 mm, then the maximum pitch of rivets in tension will be taken as
22. The difference between gross diameter and nominal diameter for the rivets up to 25 mm diameter is
23. The slenderness ratio of a column supported throughout its length by a masonry wall is
24. The external wind pressure acting on a roof depends on
25. 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
26. Minimum pitch provided in riveted steel tanks is (where d is diameter of rivets)
27. The allowable tensile stress in structural mild steel plates for steel tank is assumed as
28. Other conditions being same, the load factor in indeterminate structures is
29. In case of timber structures, the simple bending formula M = fz may be applied for
30. As per IS : 875, for the purposes of specifying basic wind velocity, the country has been divided into
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