Engineering Thermodynamics
Otto cycle efficiency is higher than Diesel cycle efficiency for the same compression ratio and heat input because in Otto cycle

Maximum temperature is higher
Heat rejection is lower
Expansion and compression are isentropic
Combustion is at constant volume

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Engineering Thermodynamics
The distillation carried out in such a way that the liquid with the lowest boiling point is first evaporated and re-condensed, then the liquid with the next higher boiling point is then evaporated and re-condensed, and so on until all the available liquid fuels are separately recovered in the sequence of their boiling points. Such a process is called

Full distillation
Cracking
Fractional distillation
Carbonisation

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Engineering Thermodynamics
Stirling cycle consists of

One constant volume, one constant pressure and two isentropic processes
Two constant volume and two isentropic processes
Two constant volume and two isothermal processes
Two constant pressure and two isothermal processes

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