Strength of Materials

231. The nature of the stress in horizontal members of the truss shown in below figure may be

1. Compressive
2. Tensile
3. Shear
4. Zero

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232. The necessary condition for forces to be in equilibrium is that these should be

1. Coplanar
2. Meet at one point
3. Both (A) and (B) above
4. All be equal

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233. The neutral axis of a beam cross-section must

1. Pass through the centroid of the section
2. Be equidistant from the top of bottom films
3. Be an axis of symmetry of the section
4. None of these

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234. The number of points of contraflexure in a simple supported beam carrying uniformly distributed load, is

1. 0
2. 1
3. 2
4. 3

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235. The phenomenon of slow extension of materials having constant load, i.e. increasing with the time is called

1. Creeping
2. Yielding
3. Breaking
4. None of these

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236. The phenomenon of slow growth of strain under a steady tensile stress, is called

1. Yielding
2. Creeping
3. Breaking
4. None of these

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237. The point of contraflexure occurs in

1. Cantilever beams only
2. Continuous beams only
3. Over hanging beams only
4. All types of beams

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238. The possible loading in various members of framed structures are

1. Compression or tension
2. Buckling or shear
3. Shear or tension
4. All of the above

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239. The principal stresses at a point are 100, 100 and -200 kgf/cm², the octahedral shear stress at the point is:

1. 100 √2 kg/cm²
2. 200 √2 kg/cm²
3. 300 √2 kg/cm²
4. 400 √2 kg/cm²

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240. The product of either force of couple with the arm of the couple is called

1. Resultant couple
2. Moment of the forces
3. Resulting couple
4. Moment of the couple

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