Q.14 Which one of the following represents open thermodynamic system? (a) Manual ice cream freezer (b) Centrifugal pump (c) Pressure cooker (d) Bomb calorimeter [IES-2011] Q.15 A thermodynamic system is considered to be an isolated one if (a) mass transfer and entropy change are zero (b) entropy change and energy transfer are zero (c) energy transfer and mass transfer are zero (d) mass transfer and volume change are zero [IES-2011] Q.16 A control volume is (a) an isolated system (b) a closed system but heat and work can cross the boundary (c) a specific amount of mass in space (d) a fixed region in space where mass, heat and work can cross the boundary of that region [IES-2010]