Engineering Thermodynamics
Carbonization of coal consists of

None of these
Drying and crushing the coal to a fine powder
Moulding the finely ground coal under pressure with or without a binding material
Heating the wood with a limited supply of air to temperature not less than 280°C

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Engineering Thermodynamics
Producer gas is obtained by

Passing air and a large amount of steam over waste coal at about 650°C
Carbonization of bituminous coal
Partial combustion of coal, coke, anthracite coal or charcoal in a mixed air steam blast
Passing steam over incandescent coke

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

It is impossible to construct an engine working on a cyclic process, whose sole purpose is to convert heat energy into work
None of these
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

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