Design of Steel Structures

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

1. 95.0 MPa on net area
2. 105.5 MPa on net area
3. 105.5 MPa on gross area
4. 150.0 MPa on gross area

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182. The area Ap of cover plates in one flange of a built up beam, is given by

1. A_p = Z_repr + Z_beam/h
2. A_p = Z_repr + Z_beam/A
3. A_p = Z_repr × Z_beam/h
4. A_p = Z_repr - Z_beam/h

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183. The average shear stress for rolled steel beam section, is

1. 845 kg/cm²
2. 945 kg/cm²
3. 1025 kg/cm²
4. 1500 kg/cm²

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184. The basic wind speed is specified at a height 'h' above mean ground level in an open terrain. The value of 'h' is

1. 10 m
2. 20 m
3. 25 m
4. 50 m

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185. The beam outside a wall upto floor level above it, is known as

1. Rafter
2. Purlin
3. Spandrel beam
4. Lintel

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186. The beams supporting the steps of a stair are generally known as

1. Headers
2. Trimmers
3. Stringers
4. Spandrel beams

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187. The bending moment for filler joists at the middle of an intermediate span, is

1. WL²/10
2. - WL²/10
3. - WL²/12
4. WL²/12

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188. The best arrangement to provide unified behaviour in built up steel columns is by

1. Lacing
2. Battening
3. Tie plates
4. Perforated cover plates

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189. The bracing between two columns of a steel tank will be designed to resist

1. Horizontal shear due to wind or earthquake only
2. Horizontal, shear due to wind or earthquake + 2.5% of column loads
3. Column loads + 2.5% of horizontal shear due to wind or earthquake
4. Column loads + full horizontal shear due to wind or earthquake

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190. The bracing provided in the plane of end posts is called

1. Sway bracing
2. Portal bracing
3. Top lateral bracing
4. Bottom lateral bracing

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