Strength of Materials

281. The units of moment of inertia of mass are

1. kg m²
2. m⁴
3. kg/m²
4. kg/m

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282. The value of Poisson's ratio always remains

1. Greater than one
2. Less than one
3. Equal to one
4. None of these

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283. The weakest section of a diamond riveting, is the section which passes through

1. First row
2. Second row
3. Central row
4. One rivet hole of end row

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284. The weight of a body is due to

1. Centripetal force of earth
2. Gravitational pull exerted by the earth
3. Forces experienced by body in atmosphere
4. Gravitational force of attraction towards the centre of the earth

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285. The width b and depth d of a beam cut from a wooden cylindrical log of 100 cm diameter for maximum strength are:

1. b = 57.73 cm d = 81.65 cm
2. b = 81.65 cm d = 57.73 cm
3. b = 50.00 cm d = 50.00 cm
4. b = 40.00 cm d = 80.00 cm

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286. The width of a beam of uniform strength having a constant depth d length L, simply supported at the ends with a central load W is

1. 2WL/3fd²
2. 3WL/2fd²
3. 2fL/3Wd⁴
4. 3fL²/2Wd

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287. Ties are load carrying members of a frame, which are subjected to

1. Transverse loads
2. Axial tension loads
3. Axial compressive loads
4. Torsional loads

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288. To ascertain the maximum permissible eccentricity of loads on circular columns, the rule generally followed, is

1. Middle half rule of columns
2. Middle third rule of columns
3. Middle fourth rule of columns
4. None of these

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289. Two coplanar couples having equal and opposite moments

1. Balance each other
2. Produce a couple and an unbalanced force
3. Are equivalent
4. Produce a moment of couple

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290. Two non-collinear parallel equal forces acting in opposite direction

1. Balance each other
2. Constitute a moment
3. Constitute a couple
4. Constitute a moment of couple

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