Engineering Thermodynamics
If in the equation pvn = C, the value of n = ∝, then the process is called

Isothermal process
Adiabatic process
Constant pressure process
Constant volume process

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Engineering Thermodynamics
Producer gas is obtained by

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

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