Engineering Thermodynamics Which of the following is the correct statement of the second law of thermodynamics? All of these There is a definite amount of mechanical energy, which can be obtained from a given quantity of heat energy It is impossible to transfer heat from a body at a lower temperature to a higher temperature, without the aid of an external source It is impossible to construct an engine working on a cyclic process, whose sole purpose is to convert heat energy into work All of these There is a definite amount of mechanical energy, which can be obtained from a given quantity of heat energy It is impossible to transfer heat from a body at a lower temperature to a higher temperature, without the aid of an external source It is impossible to construct an engine working on a cyclic process, whose sole purpose is to convert heat energy into work ANSWER DOWNLOAD EXAMIANS APP
Engineering Thermodynamics The air standard efficiency of an Otto cycle is given by (where r = Compression ratio, and γ = Ratio of specific heats) 1 - (1/ rγ - 1) 1 + (1/ rγ - 1) 1 + rγ - 1 1 - rγ - 1 1 - (1/ rγ - 1) 1 + (1/ rγ - 1) 1 + rγ - 1 1 - rγ - 1 ANSWER DOWNLOAD EXAMIANS APP
Engineering Thermodynamics The efficiency and work ratio of a simple gas turbine cycle are High Low Very high Very low High Low Very high Very low ANSWER DOWNLOAD EXAMIANS APP
Engineering Thermodynamics 1 kgf/cm² is equal to 1 mm Hg 760 mm Hg 735.6 mm Hg Zero mm Hg 1 mm Hg 760 mm Hg 735.6 mm Hg Zero mm Hg ANSWER DOWNLOAD EXAMIANS APP
Engineering Thermodynamics Work-done during adiabatic expansion is given by (where p1 v1, T1 = Pressure, volume and temperature for the initial condition of gas, p2, v2, T2 = Corresponding values for the final condition of gas, R = Gas constant, and γ = Ratio of specific heats) (p1 v1 - p2, v2)/(γ - 1) [m R T1/(γ - 1)][1 - (p2, v2 /p1 v1)] [m R (T1 - T2)] /(γ - 1) All of these (p1 v1 - p2, v2)/(γ - 1) [m R T1/(γ - 1)][1 - (p2, v2 /p1 v1)] [m R (T1 - T2)] /(γ - 1) All of these ANSWER DOWNLOAD EXAMIANS APP
Engineering Thermodynamics A process of heating crude oil to a high temperature under a very high pressure to increase the yield of lighter distillates, is known as Cracking Full distillation Carbonization Fractional distillation Cracking Full distillation Carbonization Fractional distillation ANSWER DOWNLOAD EXAMIANS APP
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