A cone clutch with cone angle 20° is to transmit 7.5 kW at 750 r.p.m. The normal intensity of pressure between the contact faces is not to exceed 0.12 N/mm². The coefficient of friction is 0.2. If face width is ½th of mean diameter, find : 1. the main dimensions of the clutch, and 2. axial force required while running. [Ans. R = 117 mm ; b = 46.8 mm ; r₁ = 125 mm ; r₂ = 109 mm; 1395 N]

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Work and Heat Transfer

It is generally related to thermal engineering which tells about the use, creation, conversion and transfer of heat energy between the systems. It is also considered that to transfer heat from one source to another, transfer of masses is also required. There are various mechanisms by which, transfer of heat takes place i.e. thermal conduction, convection, radiation or by change of phase. All these mechanisms have their own specific features which sometimes occur simultaneously within the same system.