Technical Interview: Mechanical Engineering: Important Questions

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Mechanical Engineering

211) What are elements of kinematics pairs?

212) What are classifications of kinematics?

213) What are the types of kinematics constraints?

214) Explain kinematic pair. What are the types of relative motors?

215) What is kinematic chain?

216) What is Giblers equation?

217) What is mechanism?

218) What type of inversion of kinematic chains?

219) What are methods of heating sustamous center of mechanism?

220) State the ages to determine the performance of mechanism with N links and J joints?

221) What is Grashof՚s criterion of movability?

222) Mohr՚s normal and shear stress at a point in desiring Mohr՚s?

223) What is principal stress?

224) What is St. Venant principal of stress?

225) Draw stress-strain curve of low carbon steel or CI?

226) What is design process of machine elements?

227) Write torsion equation of solid shafts?

228) What are stress concentration machine elements?

229) Write equation of torsions showing stress in springs?

230) What is belt drive?

231) How does band brake operate?

232) How is weld strength estimated in shear?

233) What is design consideration of gears?

234) What is ASTM, ASME?

235) Differentiate between normal and shear stress?

236) How many stresses are to be defined at a point?

237) Difference between true stress and engineering stress?

238) How is thermal stress induced into a member?

239) Differentiate between the bulk modulus and modulus of rigidity?

240) What is poison՚s ratio?

241) What are stress relations for a given radius of curvature for pure bending of the member

242) Can you draw shear and bending moment diagram for uniformly loaded cantilever beam?

243) Draw Mohr՚s circle indicating the stress at a point?

244) Explain the maximum normal stress theory of failure and which type of material is it suitable?

245) Explain the shear stress theory of failure and which type of material is it suitable?

246) Explain the maximum normal stress theory of failure and which type of material is it suitable?

247) Explain the maximum strain energy theory of failure and which type of material is it suitable?

248) Explain the maximum distortion energy theory of failure and which type of material is it suitable?

249) Can you explain the principle of entropy increase?

250) What is the role of Maxwell equation suitable for second law of thermodynamics?

251) What is the change in internal energy when P-V, V-T, T-P are considered as independent variables?

252) What is the relationship for Tds when P-V, V-T, T-P are considered as independent variables?

253) What is Helmholtz and Gibbs function՚s role in the thermodynamics?

254) Draw the different phases of pure substance for Temperature-Heat relationship?

255) Draw the useful phase diagrams of cyclic process for pure substance of steam for P-V, T-S, h-S, P-h plots?

256) What is the mechanism to define straight line motion?

257) What are mechanisms for copying a straight-line motion?

258) Can you differentiate between Davis, Ackerman automobile steering mechanisms?

259) Explain the role of friction in the inclined plane, wedge friction, screw friction, clutch friction, collar, and pivot friction?

260) Write the power transmission in the case open belt drive?

261) What is tension ratio of open belt drive?

262) Differentiate between Band and block brake system?

263) Differentiate between absorption and transmission dynamometer?

264) State the difference between Watt, Porter, Proell, Hartnell, Wilson-Hartnel, Pickering governors?

265) What are the characteristics of a governor?

266) What is effort of the governor?

267) What are different types of cams used in machines?

268) What are different types of follower motions obtained from cams in machines?

269) State the difference between static and dynamic balancing of machines?

270) Explain how balancing principles applied to machines?

271) What is law of gearing?

272) What is pressure angle of a gear?

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