Engineering Thermodynamics
Producer gas is obtained by

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

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Engineering Thermodynamics
Which is the incorrect statement about Carnot cycle?

All the heat engines are based on Carnot cycle
It is used as the alternate standard of comparison of all heat engines
All of these
It provides concept of maximising work output between the two temperature limits

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