Engineering Thermodynamics For a perfect gas, according to Boyle’s law (where P = Absolute pressure, V = Volume and T = Absolute temperature) T/P = constant, if v is kept constant P/T = constant, if v is kept constant P v = constant, if T is kept constant V/T = constant, if p is kept constant T/P = constant, if v is kept constant P/T = constant, if v is kept constant P v = constant, if T is kept constant V/T = constant, if p is kept constant ANSWER DOWNLOAD EXAMIANS APP
Engineering Thermodynamics Which of the following can be regarded as gas so that gas laws could be applicable, within the commonly encountered temperature limits? O₂, N₂, steam, CO₂ O₂, N₂, H₂, air SO₂, NH₃, CO₂, moisture O₂, N₂, water vapour O₂, N₂, steam, CO₂ O₂, N₂, H₂, air SO₂, NH₃, CO₂, moisture O₂, N₂, water vapour ANSWER DOWNLOAD EXAMIANS APP
Engineering Thermodynamics The condition for the reversibility of a cycle is The pressure and temperature of the working substance must not differ, appreciably, from those of the surroundings at any stage in the process All of these All the processes, taking place in the cycle of operation, must be extremely slow The working parts of the engine must be friction free The pressure and temperature of the working substance must not differ, appreciably, from those of the surroundings at any stage in the process All of these All the processes, taking place in the cycle of operation, must be extremely slow The working parts of the engine must be friction free ANSWER DOWNLOAD EXAMIANS APP
Engineering Thermodynamics The value of n = 1 in the polytropic process indicates it to be Irreversible process Reversible process Adiabatic process Isothermal process Irreversible process Reversible process Adiabatic process Isothermal process ANSWER DOWNLOAD EXAMIANS APP
Engineering Thermodynamics When the gas is heated at constant volume, the heat supplied Increases the internal energy of the gas and increases the temperature of the gas Both (A) and (B) Does some external work during expansion None of these Increases the internal energy of the gas and increases the temperature of the gas Both (A) and (B) Does some external work during expansion None of these 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) Both (B) and (C) cp - cv = R cv = R/ γ-1 cv/ cp =R Both (B) and (C) cp - cv = R cv = R/ γ-1 cv/ cp =R ANSWER DOWNLOAD EXAMIANS APP
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