Engineering Thermodynamics The expansion ratio (r) is the ratio of (where v1 = Volume at the beginning of expansion, and v2 = Volume at the end of expansion) v1/v2 v2/v1 (v1 + v2)/v1 (v1 + v2)/v2 v1/v2 v2/v1 (v1 + v2)/v1 (v1 + v2)/v2 ANSWER DOWNLOAD EXAMIANS APP
Engineering Thermodynamics When the gas is cooled at constant pressure, Both temperature and volume decreases Its volume increases but temperature decreases Its temperature increases but volume decreases Both temperature and volume increases Both temperature and volume decreases Its volume increases but temperature decreases Its temperature increases but volume decreases Both temperature and volume increases ANSWER DOWNLOAD EXAMIANS APP
Engineering Thermodynamics For a thermodynamic process to be reversible, the temperature difference between hot body and working substance should be Maximum Infinity Zero Minimum Maximum Infinity Zero Minimum ANSWER DOWNLOAD EXAMIANS APP
Engineering Thermodynamics The value of cp/cv for air is 1 1.45 1.4 2.3 1 1.45 1.4 2.3 ANSWER DOWNLOAD EXAMIANS APP
Engineering Thermodynamics The kinetic energy per kg molecule of any gas at absolute temperature T is equal to (where Ru = Universal gas constant) 1.5 Ru × T Ru × T 3 Ru × T 2 Ru × T 1.5 Ru × T Ru × T 3 Ru × T 2 Ru × T ANSWER DOWNLOAD EXAMIANS APP
Engineering Thermodynamics If value of n is infinitely large in a polytropic process pVn = C, then the process is known as constant Enthalpy Pressure Temperature Volume Enthalpy Pressure Temperature Volume ANSWER DOWNLOAD EXAMIANS APP
EXAMIANS