Engineering Thermodynamics
The ideal efficiency of a Brayton cycle with regeneration, with increase in pressure ratio will

Increase
Decrease
Remain unchanged
Increase/decrease depending on application

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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
None of these
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
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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