Engineering Thermodynamics According to First law of thermodynamics, Total energy of a system remains constant Total internal energy of a system during a process remains constant Internal energy, enthalpy and entropy during a process remain constant Work-done by a system is equal to the heat transferred by the system Total energy of a system remains constant Total internal energy of a system during a process remains constant Internal energy, enthalpy and entropy during a process remain constant Work-done by a system is equal to the heat transferred by the system ANSWER DOWNLOAD EXAMIANS APP
Engineering Thermodynamics The absolute zero pressure can be attained at a temperature of -273°C None of these 0°C 273 K -273°C None of these 0°C 273 K 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 + rγ - 1 1 + (1/ rγ - 1) 1 - rγ - 1 1 - (1/ rγ - 1) 1 + rγ - 1 1 + (1/ rγ - 1) 1 - rγ - 1 ANSWER DOWNLOAD EXAMIANS APP
Engineering Thermodynamics The main cause for the irreversibility is Unrestricted expansion Mechanical and fluid friction All of these Heat transfer with a finite temperature difference Unrestricted expansion Mechanical and fluid friction All of these Heat transfer with a finite temperature difference ANSWER DOWNLOAD EXAMIANS APP
Engineering Thermodynamics An open system is one in which Mass does not cross boundaries of the system, though energy may do so Both energy and mass cross the boundaries of the system Neither mass nor energy crosses the boundaries of the system Mass crosses the boundary but not the energy Mass does not cross boundaries of the system, though energy may do so Both energy and mass cross the boundaries of the system Neither mass nor energy crosses the boundaries of the system Mass crosses the boundary but not the energy ANSWER DOWNLOAD EXAMIANS APP
Engineering Thermodynamics If a gas is heated against a pressure, keeping the volume constant, then work done will be equal to Zero +ve Anywhere between zero and infinity -ve Zero +ve Anywhere between zero and infinity -ve ANSWER DOWNLOAD EXAMIANS APP
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