Design of Steel Structures

241. The maximum permissible span of asbestos cement sheets is

1. 650 mm
2. 810 mm
3. 1250 mm
4. 1680 mm

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242. The maximum slenderness ratio of a compression member carrying both dead and superimposed load is

1. 180
2. 200
3. 250
4. 350

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

1. 150
2. 180
3. 250
4. 350

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244. The maximum spacing of vertical stiffeners is

1. 1.33 d
2. 1.25 d
3. 1.5 d
4. 1.75 d
   Where d is the distance between flange angles

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245. The maximum tensile and compressive bending stress in extreme fibres of rolled I-sections and channels on the effective section, is

1. 1500 kg/cm²
2. 1420 kg/cm²
3. 1650 kg/cm²
4. 2285 kg/cm²

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246. The mechanism method and the statical method give

1. Lower and upper bounds respectively on the strength of structure
2. Upper and lower bounds respectively on the strength of structure
3. Lower bound on the strength of structure
4. Upper bound on the strength of structure

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247. The mechanism method of plastic analysis satisfies

1. Equilibrium and mechanism conditions
2. Equilibrium and plastic moment conditions
3. Mechanism and plastic moment conditions
4. Equilibrium condition only

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248. The method of design of steel framework for greatest rigidity and economy in weight, is known as

1. Simply design
2. Semi-rigid design
3. Fully rigid design
4. None of these

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249. The minimum edge distance of a rivet line connecting two or more plates, is kept equal to 37 mm plus (where t is the thickness in mm of the thinner outside plate).

1. 2 t
2. 4 t
3. 6 t
4. 8 t

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250. The minimum pitch of rivet holes of diameter d should not be less than

1. d
2. 1.25 d
3. 1.5 d
4. 2.5 d

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