Engineering Thermodynamics The index of compression ‘n’ tends to reach ratio of specific heats ‘y’ when Process is isentropic Process is isothermal Flow is uniform and steady Process is isentropic and specific heat does not change with temperature Process is isentropic Process is isothermal Flow is uniform and steady Process is isentropic and specific heat does not change with temperature ANSWER DOWNLOAD EXAMIANS APP
Engineering Thermodynamics The condition for the reversibility of a cycle is All of these The pressure and temperature of the working substance must not differ, appreciably, from those of the surroundings at any stage in the process The working parts of the engine must be friction free All the processes, taking place in the cycle of operation, must be extremely slow All of these The pressure and temperature of the working substance must not differ, appreciably, from those of the surroundings at any stage in the process The working parts of the engine must be friction free All the processes, taking place in the cycle of operation, must be extremely slow ANSWER DOWNLOAD EXAMIANS APP
Engineering Thermodynamics The compression ratio for Diesel engines is 5 to 8 3 to 6 20 to 30 15 to 20 5 to 8 3 to 6 20 to 30 15 to 20 ANSWER DOWNLOAD EXAMIANS APP
Engineering Thermodynamics If value of n is infinitely large in a polytropic process pVn = C, then the process is known as constant Volume Enthalpy Pressure Temperature Volume Enthalpy Pressure Temperature ANSWER DOWNLOAD EXAMIANS APP
Engineering Thermodynamics Relation between cp and cv is given by (where cp = Specific heat at constant pressure, cv = Specific heat at constant volume, γ = cp/cv, known as adiabatic index, and R = Gas constant) cv/ cp =R cv = R/ γ-1 Both (B) and (C) cp - cv = R cv/ cp =R cv = R/ γ-1 Both (B) and (C) cp - cv = R ANSWER DOWNLOAD EXAMIANS APP
Engineering Thermodynamics Petrol is distilled at 345° to 470°C 220° to 345°C 470° to 550°C 65° to 220°C 345° to 470°C 220° to 345°C 470° to 550°C 65° to 220°C ANSWER DOWNLOAD EXAMIANS APP
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