Engineering Thermodynamics The polytropic index (n) is given by log [(p1v1)/(p2v2)] log (p1p2)/log (v1v2) log (p2/ p1)/log (v1/ v2) log (v1/ v2)/ log (p1/p2) log [(p1v1)/(p2v2)] log (p1p2)/log (v1v2) log (p2/ p1)/log (v1/ v2) log (v1/ v2)/ log (p1/p2) ANSWER DOWNLOAD EXAMIANS APP
Engineering Thermodynamics In order that a cycle be reversible, following must be satisfied When heat is being absorbed, temperature of hot source and working substance should be same Free expansion or friction resisted expansion/compression process should not be encountered All of these When beat is being rejected, temperature of cold source and working substance should be same When heat is being absorbed, temperature of hot source and working substance should be same Free expansion or friction resisted expansion/compression process should not be encountered All of these When beat is being rejected, temperature of cold source and working substance should be same ANSWER DOWNLOAD EXAMIANS APP
Engineering Thermodynamics Which of the following is the correct statement? All the reversible engines have the same efficiency. All the reversible and irreversible engines have the same efficiency. All engines are designed as reversible in order to obtain maximum efficiency. Irreversible engines have maximum efficiency. All the reversible engines have the same efficiency. All the reversible and irreversible engines have the same efficiency. All engines are designed as reversible in order to obtain maximum efficiency. Irreversible engines have maximum efficiency. ANSWER DOWNLOAD EXAMIANS APP
Engineering Thermodynamics Zeroth law of thermodynamics Deals with conversion of mass and energy Deals with heat engines Deals with reversibility and irreversibility of process States that if two systems are both in equilibrium with a third system, they are in thermal equilibrium with each other Deals with conversion of mass and energy Deals with heat engines Deals with reversibility and irreversibility of process States that if two systems are both in equilibrium with a third system, they are in thermal equilibrium with each other ANSWER DOWNLOAD EXAMIANS APP
Engineering Thermodynamics Carnot cycle efficiency depends upon Properties of the medium/substance used Condition of engine Temperature range of operation Working condition Properties of the medium/substance used Condition of engine Temperature range of operation Working condition ANSWER DOWNLOAD EXAMIANS APP
Engineering Thermodynamics Change in internal energy in a closed system is equal to heat transferred if the reversible process takes place at constant Internal energy Volume Temperature Pressure Internal energy Volume Temperature Pressure ANSWER DOWNLOAD EXAMIANS APP
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