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Re: JNTU Kakinada Previous years question papers
Here I am giving you question paper for B tech mechanical engineering entrance examination organized by Jawaharlal Nehru Technological University, Kakinada 1. a) What is the procedure of finding the thermal stresses in a composite bar? b) The extension in a rectangular steel bar of length 1000mm and thickness of 20mm is found to be 0.21mm. The bar tappers uniformly in width from 80mm to 40mm. If E of the bar is 2x105N/mm2 determine the axial tensile load of the bar. 2. a) What are the different types of beams? Differentiate between a cantilever and simply supported beam? b) A simply supported beam of length 8m rests on its supports 8m apart, the right hand end is over hanging at 3m.the beam carries a uniform distributed load of 1600 N/m over the entire length. Draw S.F and B.M diagrams and find the point of contra flexure, if any. 3. a) What do you mean by simple bending or pure bending? What are the assumptions made in the theory of simple bending? b) A timber beam of rectangular section is to support a load of 25kN over a span of 5m. If the depth of the section is to be twice the breadth, and the stress in the timber is not to exceed 75N/mm2, find the dimensions of the cross section. How would you modify the cross section of the beam if it were a concentrated load placed at the centre with the same ratio of breadth to depth? 4. Sketch the distribution of shear stress across the depth of the beams of the following cross sections: i) T-section and ii) Square section with diagonal vertical. Jawaharlal Nehru Technological University, Kakinada B tech ME paper |
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