Engineering Thermodynamics
Coke is produced

From the finely ground coal by moulding under pressure with or without a binding material
By heating wood with a limited supply of air to a temperature not less than 280°C
When coal is first dried and then crushed to a fine powder by pulverizing machine
When coal is strongly heated continuously for 42 to 48 hours in the absence of air in a closed vessel

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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 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

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Engineering Thermodynamics
The thermodynamic difference between a Rankine cycle working with saturated steam and the Carnot cycle is that

Heat is supplied to water at temperature below the maximum temperature of the cycle
Rankine cycle is hypothetical
Carnot cycle can't work with saturated steam
A Rankine cycle receives heat at two places

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