Design of Steel Structures

221. The external wind pressure acting on a roof depends on

1. Degree of permeability of roof
2. Slope of roof
3. Both (A) and (B)
4. None of the above

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222. The failure of a web plate takes place by yielding if the ratio of the clear depth to thickness of the web, is less than

1. 45
2. 55
3. 62
4. 82

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

1. Axial forces
2. Shear and axial forces
3. Shear and bending forces
4. Axial and bending forces

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224. The greatest gauge of long rivets should not exceed (where d is the diameter of the holes).

1. 2 d
2. 4 d
3. 6 d
4. 8 d

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225. The greatest permissible clear dimension of the web of thickness t in the panel of a plate girder, is restricted to

1. 180 t
2. 220 t
3. 230 t
4. 270 t

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226. The gross diameter of a rivet is the diameter of

1. Cold rivet before driving
2. Rivet after driving
3. Rivet hole
4. None of these

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227. The gross section of the web of a beam is defined as

1. Depth of the beam multiplied by its web thickness
2. Width of the flange multiplied by its web thickness
3. Sum of the flange width and depth of the beam multiplied by the web thickness
4. None of these

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228. The heaviest I-section for same depth is

1. ISMB
2. ISLB
3. ISHB
4. ISWB

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229. The Indian standard code which deals with steel structures, is

1. IS : 875
2. IS : 800
3. IS : 456
4. IS : 1893

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230. The internal pressure coefficient on walls for buildings with large permeability is taken as

1. ± 0.2
2. ±0.5
3. ± 0.7
4. 0

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