Engineering Thermodynamics Which of the following is the correct statement of the second law of thermodynamics? It is impossible to transfer heat from a body at a lower temperature to a higher temperature, without the aid of an external source 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 construct an engine working on a cyclic process, whose sole purpose is to convert heat energy into work It is impossible to transfer heat from a body at a lower temperature to a higher temperature, without the aid of an external source 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 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 efficiency of the Carnot cycle may be increased by Decreasing the highest temperature Increasing the highest temperature Keeping the lowest temperature constant Increasing the lowest temperature Decreasing the highest temperature Increasing the highest temperature Keeping the lowest temperature constant Increasing the lowest temperature ANSWER DOWNLOAD EXAMIANS APP
Engineering Thermodynamics Energy can neither be created nor destroyed, but it can be transformed from one form to another. This statement is known as Second law of thermodynamics Zeroth law of thermodynamics First law of thermodynamics Kinetic theory of gases Second law of thermodynamics Zeroth law of thermodynamics First law of thermodynamics Kinetic theory of gases ANSWER DOWNLOAD EXAMIANS APP
Engineering Thermodynamics The thermodynamic difference between a Rankine cycle working with saturated steam and the Carnot cycle is that Heat is supplied to water at temperature below the maximum temperature of the cycle A Rankine cycle receives heat at two places Carnot cycle can't work with saturated steam Rankine cycle is hypothetical Heat is supplied to water at temperature below the maximum temperature of the cycle A Rankine cycle receives heat at two places Carnot cycle can't work with saturated steam Rankine cycle is hypothetical ANSWER DOWNLOAD EXAMIANS APP
Engineering Thermodynamics The ideal efficiency of a Brayton cycle with regeneration, with increase in pressure ratio will Decrease Remain unchanged Increase Increase/decrease depending on application Decrease Remain unchanged Increase Increase/decrease depending on application ANSWER DOWNLOAD EXAMIANS APP
Engineering Thermodynamics The same volume of all gases would represent their Gas characteristic constants Molecular weights Densities Specific weights Gas characteristic constants Molecular weights Densities Specific weights ANSWER DOWNLOAD EXAMIANS APP
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