Engineering Thermodynamics Compressed air coming out from a punctured football Remains at the same temperature Becomes hotter May become hotter or cooler depending upon the humidity of the surrounding air Becomes cooler Remains at the same temperature Becomes hotter May become hotter or cooler depending upon the humidity of the surrounding air Becomes cooler 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)] All of these [m R (T1 - T2)] /(γ - 1) (p1 v1 - p2, v2)/(γ - 1) [m R T1/(γ - 1)][1 - (p2, v2 /p1 v1)] All of these [m R (T1 - T2)] /(γ - 1) ANSWER DOWNLOAD EXAMIANS APP
Engineering Thermodynamics Which of the following process can be made reversible with the help of a regenerator? Constant volume process Constant pressure process Constant pvn process All of these Constant volume process Constant pressure process Constant pvn process All of these ANSWER DOWNLOAD EXAMIANS APP
Engineering Thermodynamics An open system is one in which Both energy and mass cross the boundaries of the system Mass crosses the boundary but not the energy Neither mass nor energy crosses the boundaries of the system Mass does not cross boundaries of the system, though energy may do so Both energy and mass cross the boundaries of the system Mass crosses the boundary but not the energy Neither mass nor energy crosses the boundaries of the system Mass does not cross boundaries of the system, though energy may do so ANSWER DOWNLOAD EXAMIANS APP
Engineering Thermodynamics The standard value of atmospheric pressure taken at sea level is 1.013 bar All of these 760 mm of Hg 1013 × 102 N/m2 1.013 bar All of these 760 mm of Hg 1013 × 102 N/m2 ANSWER DOWNLOAD EXAMIANS APP
Engineering Thermodynamics First law of thermodynamics Does not enable to determine change in entropy All of these Enables to determine change in internal energy of the system Provides relationship between heat, work and internal energy Does not enable to determine change in entropy All of these Enables to determine change in internal energy of the system Provides relationship between heat, work and internal energy ANSWER DOWNLOAD EXAMIANS APP
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