Engineering Thermodynamics
In a steady flow process, the ratio of

Heat transfer is constant
Work transfer is constant
All of these
Mass flow at inlet and outlet is same

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Engineering Thermodynamics
A closed system is one in which

Mass does not cross boundaries of the system, though energy may do so
Mass crosses the boundary but not the energy
Neither mass nor energy crosses the boundaries of the system
Both energy and mass cross the boundaries of the system

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