Engineering Thermodynamics
A process, in which the temperature of the working substance remains constant during its expansion or compression, is called

Polytropic process
Hyperbolic process
Isothermal process
Adiabatic process

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Engineering Thermodynamics
According to Kelvin-Planck’s statement of second law of thermodynamics,

It is possible to construct an engine working on a cyclic process, whose sole purpose is to convert heat energy into work
It is impossible to construct a device which operates in a cyclic process and produces no effect other than the transfer of heat from a cold body to a hot body
None of these
It is impossible to construct an engine working on a cyclic process, whose sole purpose is to convert heat energy into work

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