Engineering Thermodynamics
Producer gas is obtained by

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

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Engineering Thermodynamics
Select the wrong statement

A Joule cycle consists of two constant volume and two isentropic processes.
All of these
An Ericsson cycle consists of two constant pressure and two isothermal processes.
An Otto cycle consists of two constant volume and two isentropic processes.

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