Engineering Thermodynamics
A manufacturer claims to have a heat engine capable of developing 20 h.p. by receiving heat input of 400 kcal/mt and working between the temperature limits of 227° C and 27° C. His claim is

Cost will be very high
Theoretically possible
Not possible
May be possible with lot of sophistications

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Engineering Thermodynamics
A closed system is one in which

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

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