Strength of Materials

261. The section modulus of a rectangular section is proportional to

1. Area of the section
2. Square of the area of the section
3. Product of the area and depth
4. Product of the area and width

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262. The shape of the bending moment diagram over the length of a beam, carrying a uniformly distributed load is always

1. Linear
2. Parabolic
3. Cubical
4. Circular

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263. The shape of the bending moment diagram over the length of a beam, carrying a uniformly increasing load, is always

1. Linear
2. Parabolic
3. Cubical
4. Circular

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264. The shape of the bending moment diagram over the length of a beam, having no external load, is always

1. Linear
2. Parabolic
3. Cubical
4. Circular

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265. The shear force on a simply supported beam is proportional to

1. Displacement of the neutral axis
2. Sum of the forces
3. Sum of the transverse forces
4. Algebraic sum of the transverse forces of the section

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266. The shear stress at any section of a shaft is maximum

1. At the centre of the section
2. At a distance r/2 from the centre
3. At the top of the surface
4. At a distance 3/4 r from the centre

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267. The slenderness ratio of a vertical column of a square cross-section of 2.5 cm sides and 300 cm length, is

1. 200
2. 240
3. 360
4. 416

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268. The slenderness ratio of a vertical column of square cross- section of 10 cm side and 500 cm long, is

1. 117.2
2. 17.3
3. 173.2
4. 137.2

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269. The stiffness factor for a prismatic beam of length L and moment of inertia I, is

1. IE/L
2. 2EI/L
3. 3EI/L
4. 4EI/L

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270. The stress at which extension of a material takes place more quickly as compared to the increase in load, is called

1. Elastic point
2. Plastic point
3. Breaking point
4. Yielding point

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